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An overview of grid-forming technology and its application in new-type power system
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作者 Zehong Liu Yu Sun Chao Ma 《Global Energy Interconnection》 EI CSCD 2024年第5期541-552,共12页
To address the global climate crisis,achieving energy transitions is imperative.Establishing a new-type power system is a key measure to achieve CO_(2) emissions peaking and carbon neutrality.The core goal is to trans... To address the global climate crisis,achieving energy transitions is imperative.Establishing a new-type power system is a key measure to achieve CO_(2) emissions peaking and carbon neutrality.The core goal is to transform renewable energy resources into primary power sources.The large-scale integration of high proportions of renewable energy sources and power electronic devices will dramatically change the operational mechanisms and control strategies of power systems.Existing wind and solar converters mostly adopt the grid-following control mode,which leads to significant challenges in system security and stability as it is insufficient to support the frequency and voltage of the grid.On the other hand,grid-forming control technology(GFM)can provide voltage and frequency support for the system,and thus becomes an effective measure to improve the inertia and damping characteristics of power systems.This paper illustrates the principles,control strategies,equipment types,application scenarios,and project implementation of grid-forming technology.The simulation and analysis based on a renewable-dominated real new-type power system show that GFM can significantly enhance the frequency and voltage support capacity of the power system,improve renewable energy accommodation capacity and grid transmission capacity under weak grid conditions,and play an important role in enhancing the stability and power supply reliability of renewable-dominated new-type power systems. 展开更多
关键词 new-type power system Renewable energy resources Grid-Forming(GFM) Control strategy
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Production of Partial New-typed Brassica Napus by Introgression of Genomic Components from B. rapa and B. carinata 被引量:1
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作者 栗茂腾 刘建民 +2 位作者 王艳婷 余龙江 孟金陵 《Journal of Genetics and Genomics》 SCIE CAS CSCD 北大核心 2007年第5期460-468,共9页
A breeding strategy for widening the germplasm of Brassica napus was proposed by introgression of the A^r subgenome of B. rapa (A^rA^r) and C^c of B. carinata (B^cB^cC^cC^c) into natural B. napus (AnAncncn). The... A breeding strategy for widening the germplasm of Brassica napus was proposed by introgression of the A^r subgenome of B. rapa (A^rA^r) and C^c of B. carinata (B^cB^cC^cC^c) into natural B. napus (AnAncncn). The progenies with 38 chromosomes that were derived from the self-pollinated seeds of pentaploid hybrids (A^rA^nB^cC^cC^n) were used for further research. Some of the partial new-typed B. napus showed normal meiotic behavior, high portion of germinated pollen and normal embryological development. This indicates that the selected new-typed B. napus had a balanced genetic base. Molecular analysis showed that about 50% of the genome in the new-typed B. napus was replaced by A^r and C^c subgenome from B. rapa and B. carinata. Considering the genetic diversity among different lines of new-typed B. napus, it was deduced that the introgression of the genomic components from B, rapa and B. carinata could widen the genetic diversity of rapeseed. 展开更多
关键词 new-typed B. napus pollen germination embryo sac development genome introgression genetic distance
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Spatiotemporal Characteristics of Rural Labor Migration in China: Evidence from the Migration Stability under New-type Urbanization 被引量:7
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作者 DENG Wei ZHANG Shaoyao +3 位作者 ZHOU Peng PENG Li LIU Ying WAN Jiangjun 《Chinese Geographical Science》 SCIE CSCD 2020年第5期749-764,共16页
Although the factors affecting rural-to-urban migration have been discussed and analyzed in detail, few studies have examined the spatiotemporal dynamic characteristics of rural migrants’ employment and working-citie... Although the factors affecting rural-to-urban migration have been discussed and analyzed in detail, few studies have examined the spatiotemporal dynamic characteristics of rural migrants’ employment and working-cities in the post-immigrate era, which is essential for the citizenization and social integration of new-type urbanization in China. This study uses survey data from rural migration laborers across the eastern, central, and western China to construct a comprehensive labor migration stability index, and compares the determinants of the migration stability of rural labor among cities and industries using Geodetector. The results are as follows: 1) Compared with the midwestern cities, eastern cities have attracted younger and more skilled rural labor, and industries with higher technical content have higher migration stability among rural laborers. 2) Rural laborers more often adapt to changes by changing employment instead of changing working-cities. 3) The individual experiences of rural laborers and urban characteristics have significant impacts on the stability of migration, and family and societal guanxi(Chinese interpersonal relationships) enhance migration stability. 4) A unified labor market and convenient transportation have somewhat slowed industrial transfers and labor backflow. This study enhances our understanding of the roles of industrial transfer and new-type urbanization in shaping the labor geography landscape and provides policy implications for the promotion of people-oriented urbanization. 展开更多
关键词 migration stability rural labor Geodetector spatiotemporal characteristics new-type urbanization
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Paleoenvironments Recorded in a New-Type Ferromanganese Crust fromthe East Philippine Sea 被引量:1
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作者 徐兆凯 李安春 +1 位作者 蒋富清 李铁刚 《Journal of China University of Geosciences》 SCIE CSCD 2006年第1期34-42,共9页
We attempt to recover the paleocnvironments recorded in the accretion of a typical newtype hydrogenetic ferromanganese crust from the deep water areas of the East Philippine Sea. From detailed geochemical and U-series... We attempt to recover the paleocnvironments recorded in the accretion of a typical newtype hydrogenetic ferromanganese crust from the deep water areas of the East Philippine Sea. From detailed geochemical and U-series chronological studies, analysis of major and minor elements performed by X-ray fluorescence spectrometry (XRF) and inductively coupled plasma-mass spectrometer (ICPMS), three major accretion periods and corresponding paleocnvironments can be ascertained. The first period is a faster accretion period in the terminal Late Miocene to the Early Pliocene with looser structure and higher volcanic detritus content, corresponding to the active Antarctic bottom waters and depressed temperature from the intermediate Middle Miocene to the Early Pliocene. The second period is a pulse of pelagic clay deposition at the Early to Middle Pliocene, reflecting the shrinkage of the Antarctic bottom waters and the global temperature elevation of this period. The third period is a slower accretion period from the Middle Pliocene, which indicates the more violent activity of Antarctic bottom waters once again and more depressed temperature than the first period, facilitating the accretion of a more compact and pure ferromanganese zone. The paleoceanographic histories of these studied areas had not been made clear in previous research. 展开更多
关键词 new-type ferromanganese crust PALEOENVIRONMENT GEOCHEMISTRY East Philippine Sea
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Cultivating New-type Farmers Based on the Theory of Human Resources Development 被引量:3
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作者 ZHANG Li 《Asian Agricultural Research》 2010年第7期14-18,共5页
Under the direction of theory of human resources development,this thesis analyzes the impact of rural human resources development oncultivating new-type farmers.Firstly,it increases the input of rural basic education;... Under the direction of theory of human resources development,this thesis analyzes the impact of rural human resources development oncultivating new-type farmers.Firstly,it increases the input of rural basic education;secondly,it reinforces the vocational education and technologytraining;thirdly,it promotes the rural medical and public health services;fourthly,it quickens the rural labor transfer.The status quo of China's ruralhuman resources has been analyzed as follows:in terms of the quantity of rural human resources,the status quo is large and quick-developed baseof rural human resources,high labor participatory rate,and constitution of low age;in terms of the quality of rural human resources,the status quois the ubiquitous low quality of rural human resources,low technological level of rural human resources,and overall low physical quality of farmers;in terms of the structure of rural human resources,the status quo is the irrational industrial structure distribution and imbalanced regional structuredistribution.The thesis also discusses the edification of theory of human resources development in cultivating new-type farmers.First,in terms ofthe control over quantity of rural human resources,it is to keep the stability of family planning policy,and expedite the transfer of rural surplus la-bor;second,in terms of promoting the quality of rural human resources,it is to bolster the development of reserve rural labor force resources,toconstruct the adult educational training system with Chinese characteristics,and to build rural primary health care system;third,in terms of adjus-ting the structure of rural human resources,it is to perfect rural human resources market,and adjust rural economical structure and talents struc-ture. 展开更多
关键词 Development of human resources new-type farmers Educational training Rural surplus labor force China
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BUILDING A MODERATELY PROSPEROUS SOCIETY IN ALL RESPECTS——New-Type Industrialization 被引量:3
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作者 Zhang Qizi 《China Economist》 2020年第1期48-71,共24页
After announcing the goal of building a moderately prosperous society in all respects by 2020, the Chinese leadership also called for a new path of industrialization, putting a premium on quality and new development c... After announcing the goal of building a moderately prosperous society in all respects by 2020, the Chinese leadership also called for a new path of industrialization, putting a premium on quality and new development concepts. Unlike traditional industrialization in the broad or narrow sense, new-type industrialization features synergy between primary, secondary, and tertiary industries, integration between traditional economy and the new economy, environmental protection, technology progress, and innovation. It represents an inclusive approach to industrial development. At the fundamental level, the success of China’s new-type industrialization can be attributed to China’s inclusive learning and innovations. 展开更多
关键词 building a moderately prosperous society new-type industrialization inclusive learning and innovation
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Resistance characteristics of the ball packed-bed regenerator of the new-type swirl flow hot blast stove 被引量:1
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作者 Hongzhi Guo, Xiaohu Cheng, and Shuchen ZhangDepartment of Thermal Engineering, University of Science and Technology Beijing, Beijing 100083, China 《Journal of University of Science and Technology Beijing》 CSCD 2003年第1期21-24,共4页
A renovation project of miniaturization and high efficiency is provided for the hot blast stove .The experimental data tested feasibility of the new-type swirl flow hot blast stove. The normal and hot state experiment... A renovation project of miniaturization and high efficiency is provided for the hot blast stove .The experimental data tested feasibility of the new-type swirl flow hot blast stove. The normal and hot state experiments have been done through changing the angle of gas entering into the regenerator. Factors influencing pressure drop have been studied and analyzed. The experimental results can be formulated in the form of the Ergun equation. The regression equation is obtained. And two modified coefficients are offered to the regenerator pressure drop of the new-type swirl flow hot blast stove. 展开更多
关键词 the new-type swirl flow hot blast stove REGENERATOR regression equation resistance drop
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Characteristic Town: The Effective Path of New-type Urbanization with Chinese Characteristics Based on the Investigation of Intemet Town Wuzheng, Aficion Chocolate Town Jiashan, Photovoltaic Town Xiuzhou in Zhejiang 被引量:1
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作者 WU Zhen-ping 《Journal of Literature and Art Studies》 2018年第3期412-416,共5页
The characteristic town is a dynamic and vivid case of experience of Zhejiang. With the internet town Wuzheng, Aficion chocolate town Jiashan, photovoltaic town Xiuzhou in Zhejiang as the research perspective, the con... The characteristic town is a dynamic and vivid case of experience of Zhejiang. With the internet town Wuzheng, Aficion chocolate town Jiashan, photovoltaic town Xiuzhou in Zhejiang as the research perspective, the concept of development that the production, life and ecology merge together and the development direction and value of New-type urbanization is consistent, and it is the effective path of New-type urbanization development. At the same time, these towns provide a model for the development of the country small town 展开更多
关键词 haracteristic town new-type urbanization the production life and ecology merge together
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Dynamic changes and driving factors of land use under new-type urbanization: A case of Guiyang 被引量:1
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作者 ZENG Fang WEI Yuan 《Ecological Economy》 2015年第3期236-242,共7页
With the continuous progress of new-type urbanization in Karst mountain area, how to correctly deal with the relationship between urban economy and land use are attracting much attention. Based on the land-use change ... With the continuous progress of new-type urbanization in Karst mountain area, how to correctly deal with the relationship between urban economy and land use are attracting much attention. Based on the land-use change data, this paper analyzes the characteristics of land use change and its driving factors in Guiyang with the method of land-use dynamic analysis, land utilization and factor correlation analysis. We get the following results:(1) the change of land use was obvious during 2004 and 2012. The area of arable land and other land were decreased, the rate of decrease are 3.89% and 8.24%. In the meantime, a series of construction land and forest area increased a lot, the rate of increase are 3.89% and 8.24%.(2) The integrated land use dynamic degree of two research stages(2004-2009 and 2009-2012) were decreased from 2.12% to 0.34%, this suggests dynamic changes of land tend to be stable.(3) Four kinds of Land use class have a great contribution to the index of land use degree respectively. The composite index of land use degree rose from 229.58 to 247.19 during 2004 and 2012; the land use is still in the development stage.(4) Economy, population, transportation and policy guidance are the main drivers of land use change. 展开更多
关键词 new-type URBANIZATION LAND USE driving FACTORS GUI
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Design of multifunctional polymeric binders in silicon anodes for lithium‐ion batteries 被引量:3
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作者 Masytha Nuzula Ramdhiny Ju‐Won Jeon 《Carbon Energy》 SCIE EI CAS CSCD 2024年第4期140-163,共24页
Silicon(Si)is a promising anode material for lithium‐ion batteries(LIBs)owing to its tremendously high theoretical storage capacity(4200 mAh g−1),which has the potential to elevate the energy of LIBs.However,Si anode... Silicon(Si)is a promising anode material for lithium‐ion batteries(LIBs)owing to its tremendously high theoretical storage capacity(4200 mAh g−1),which has the potential to elevate the energy of LIBs.However,Si anodes exhibit severe volume change during lithiation/delithiation processes,resulting in anode pulverization and delamination with detrimental growth of solid electrolyte interface layers.As a result,the cycling stability of Si anodes is insufficient for commercialization in LIBs.Polymeric binders can play critical roles in Si anodes by affecting their cycling stability,although they occupy a small portion of the electrodes.This review introduces crucial factors influencing polymeric binders'properties and the electrochemical performance of Si anodes.In particular,we emphasize the structure–property relationships of binders in the context of molecular design strategy,functional groups,types of interactions,and functionalities of binders.Furthermore,binders with additional functionalities,such as electrical conductivity and self‐healability,are extensively discussed,with an emphasis on the binder design principle. 展开更多
关键词 CONDUCTIVITY lithium‐ion batteries molecular interactions polymeric binders self‐healability Si anodes
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产前超声诊断Binder综合征
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作者 牛可雄 李天刚 +3 位作者 杨琼宇 苏晓荣 吴温瑞 张文栋 《中国介入影像与治疗学》 北大核心 2024年第1期60-62,共3页
Binder综合征是罕见的先天性面中部发育畸形[1],发病率约1/18000[2]。三维超声具有立体成像、动态可视化等优点,能实时、动态观察胎儿颜面部结构,已广泛应用于临床。本研究观察产前超声诊断Binder综合征的价值。1资料与方法1.1研究对象... Binder综合征是罕见的先天性面中部发育畸形[1],发病率约1/18000[2]。三维超声具有立体成像、动态可视化等优点,能实时、动态观察胎儿颜面部结构,已广泛应用于临床。本研究观察产前超声诊断Binder综合征的价值。1资料与方法1.1研究对象收集2019年10月—2022年10月于甘肃省妇幼保健院经产前超声诊断为Binder综合征的7胎胎儿,均为单胎,孕周22~24周、平均(22.9±0.7)周;孕妇年龄26~36岁、平均(30.0±3.3)岁,其中1名孕期有环境毒害物(甲醛)接触史,1名有孕早期服药史(布洛芬),1名孕期从事美甲工作并频繁接触甲醇、乙醛等化学溶剂。本研究经院伦理委员会批准[(2021)GSFY伦审[47]号];孕妇及其家属均知情同意。 展开更多
关键词 胎儿 先天畸形 超声检查 产前 上颌骨发育不良 binder
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Numerical calculation of flow and heat transfer process in the new-type external combustion swirl-flowing hot stove
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作者 ShuchenZhang HongzhiGuo +3 位作者 XiangjunLiu ZhangpingCai XianchengGao SidongXu 《Journal of University of Science and Technology Beijing》 CSCD 2003年第5期31-34,共4页
It is clarified that the important method to improve the blast temperature ofthe small and the middle blast furnaces whose production is about two-thirds of total sum of Chinafrom 1000℃ to 1250-1300℃ is to preheat b... It is clarified that the important method to improve the blast temperature ofthe small and the middle blast furnaces whose production is about two-thirds of total sum of Chinafrom 1000℃ to 1250-1300℃ is to preheat both their combustion-supporting air and coal gas. The airtemperature of blast furnaces can be reached to 1250-1300℃ by burning single blast furnace coal gasif high speed burner is applied to blast furnaces and new-type external combustion swirl-flowinghot stove is used to preheat their combustion-supporting air. The computational results of the flowand heat transfer processions in the hot stove prove that the surface of the bed of the thermalstorage balls there have not eccentric flow and the flow field and temperature field distribution iseven. The computational results of the blast temperature distribution are similar to thosedetermination experiment data. The numerical results also provide references for developing anddesigning the new-type external combustion swirl-flowing hot stoves. 展开更多
关键词 new-type external combustion swirl-flowing hot stove flow field temperaturefield numerical calculation
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New-type Agent for Fabrics Aftertreatment
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作者 Li Bin 《China's Foreign Trade》 1994年第9期55-55,共1页
A new type of TS series agent for the treatment of fabrics is being made by the Beijing Junsheng Fine Chemical Industry Co., Ltd. with the assistance of the Chemistry Research Institute of the Chinese Academy of Scien... A new type of TS series agent for the treatment of fabrics is being made by the Beijing Junsheng Fine Chemical Industry Co., Ltd. with the assistance of the Chemistry Research Institute of the Chinese Academy of Sciences. The product is a highly-effective treatment containing organic silicon 展开更多
关键词 TYPE new-type Agent for Fabrics Aftertreatment
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New-Type Inhalation For Bronchial Asthma
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《China's Foreign Trade》 1994年第5期19-19,共1页
Aiqun Brand Bronchial Astnma Inhalation (Kechuan Biwen’an) developed by the Hunan Xiangheng Pharmaceutical Factory is prepared and produced with the elements necessary to the body, and many kinds of traditional Chine... Aiqun Brand Bronchial Astnma Inhalation (Kechuan Biwen’an) developed by the Hunan Xiangheng Pharmaceutical Factory is prepared and produced with the elements necessary to the body, and many kinds of traditional Chinese medicinal herbs, according to a scientific prescription. It is used to treat acute and chronic bronchitis, bronchial asthma, pulmonary emphysema, allergic rhinitis, and chronic pharyngitis 展开更多
关键词 BODY new-type Inhalation For Bronchial Asthma
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Empirical Study on Driving Factors and Countermeasures of New-type Urbanization in China
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作者 Hui ZHONG 《International Journal of Technology Management》 2013年第9期138-141,共4页
The ultimate goal of new-type urbanization is to integrate urban and rural areas, which is influenced by various factors such as urban and rural populations, technology, capital, resources, etc. Accordingly, the need ... The ultimate goal of new-type urbanization is to integrate urban and rural areas, which is influenced by various factors such as urban and rural populations, technology, capital, resources, etc. Accordingly, the need and importance of economic, social, cultural, and ecological factors ought to be analyzed to promote new-type urbanization. In this paper, we first describe the driving factors of new-type urbanization, and then we conduct an empirical study on the driving factors of new-type urbanization and analyze the data with Logit model. Finally, it is put forward that more effort should be made to accelerate new-type urbanization in such aspects as top-down design, government support, social interaction, etc. 展开更多
关键词 driving factors new-type urbanization empirical study
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An Analysis of the Degree of Coupling and Coordination of Agricultural Modernization and New-Type Urbanization in the Chengdu-Chongqing Economic Circle
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作者 Wu Xiaoxuan Liu Hang 《Contemporary Social Sciences》 2022年第3期1-19,共19页
Based on the panel data(2005-2019)of cities(prefectures)in the Chengdu-Chongqing Economic Circle,we have developed an evaluation system for agricultural modernization and new-type urbanization that measures the develo... Based on the panel data(2005-2019)of cities(prefectures)in the Chengdu-Chongqing Economic Circle,we have developed an evaluation system for agricultural modernization and new-type urbanization that measures the development level of each city and applies the coupling and coordination model to calculate their coupling and combination levels.The results indicate that the level of comprehensive order parameters of agricultural modernization in various cities(prefectures)in the Chengdu-Chongqing Economic Circle generally displays an upward trend.The areas with high-degree agricultural modernization were mainly distributed in Chengdu from 2005 to 2010,and the center of agricultural modernization was shifted to western areas after 2010,with a stable upward trend in the level of comprehensive order parameters of new-type urbanization.In terms of coupling degree,there was an overall upward trend.Except for Nanchong and Dazhou,other cities(prefectures)progressed from“Undeveloped Coordination”to“Intermediate Coordination.”The imbalanced development of agricultural modernization and new-type urbanization continually improved,with the combination level increasing from“Low-Low”to“Medium-Medium.” 展开更多
关键词 Chengdu-Chongqing agricultural modernization new-type urbanization coupling and coordination
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Speech by Mr. Chen Zongxing at the 2012 Understanding and Cooperation Dialogue Part II: New-type Community and Harmonious Society
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作者 Liu Wanyun 《International Understanding》 2012年第2期43-45,共3页
正Distinguished guests, ladies and gentlemen, dear friends: Today we meet here in picturesque Hangzhou for the 2012 Understanding and Cooperation Dialogue Part II: New-type Community and Harmonious Society. On behalf ... 正Distinguished guests, ladies and gentlemen, dear friends: Today we meet here in picturesque Hangzhou for the 2012 Understanding and Cooperation Dialogue Part II: New-type Community and Harmonious Society. On behalf of the National Committee 展开更多
关键词 type Chen Zongxing at the 2012 Understanding and Cooperation Dialogue Part II new-type Community and Harmonious Society Speech by Mr II
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Enhancing Li-S battery performance via functional polymer binders for polysulfide inhibition
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作者 Jinpeng Jian Qian Chen +6 位作者 Hao Sun Rui Li Yaolin Hou Yulong Liu Jia Liu Haiming Xie Jiefang Zhu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第10期228-236,I0005,共10页
The commercialization of lithium-sulfur(Li-S)batteries faces several challenges,including poor conductivity,unexpected volume expansion,and continuous sulfur loss from the cathode due to redox shuttling.In this study,... The commercialization of lithium-sulfur(Li-S)batteries faces several challenges,including poor conductivity,unexpected volume expansion,and continuous sulfur loss from the cathode due to redox shuttling.In this study,we introduce a novel polymer via a simple cross-linking between poly(ether-thioureas)(PETU)and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)as a bifunctio nal binder for Li-S batteries(devotes as"PPTU").Compared to polyvinylidene fluoride(PVDF),as-prepared PPTU exhibits significantly higher electrical conductivity,facilitating electrochemical reactions.Additionally,PPTU demonstrates effective adsorption of lithium polysulfides,leading to improved cycling stability by suppressing the shuttling effect.We investigate this behavior by monitoring morphological changes at the cell interface using synchrotron X-ray tomography.Cells with PPTU binders exhibit remarkable rate performance,desired reversibility,and excellent cycling stability even under stringent bending and twisting conditions.Our work represents promising progress in functional polymer binder development for Li-S batteries. 展开更多
关键词 Li-S batteries Bifunctional binders Electrode conductivity Shuttle effect
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Recycling arsenic-containing bio-leaching residue after thermal treatment in cemented paste backfill:Structure modification,binder properties and environmental assessment
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作者 Dengfeng Zhao Shiyu Zhang Yingliang Zhao 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第10期2136-2147,共12页
The substantial arsenic(As)content present in arsenic-containing bio-leaching residue(ABR)presents noteworthy environ-mental challenges attributable to its inherent instability and susceptibility to leaching.Given its... The substantial arsenic(As)content present in arsenic-containing bio-leaching residue(ABR)presents noteworthy environ-mental challenges attributable to its inherent instability and susceptibility to leaching.Given its elevated calcium sulfate content,ABR exhibits considerable promise for industrial applications.This study delved into the feasibility of utilizing ABR as a source of sulfates for producing super sulfated cement(SSC),offering an innovative binder for cemented paste backfill(CPB).Thermal treatment at varying temperatures of 150,350,600,and 800℃ was employed to modify ABR’s performance.The investigation encompassed the examination of phase transformations and alterations in the chemical composition of As within ABR.Subsequently,the hydration characteristics of SSC utilizing ABR,with or without thermal treatment,were studied,encompassing reaction kinetics,setting time,strength development,and microstructure.The findings revealed that thermal treatment changed the calcium sulfate structure in ABR,consequently impacting the resultant sample performance.Notably,calcination at 600℃ demonstrated optimal modification effects on both early and long-term strength attributes.This enhanced performance can be attributed to the augmented formation of reaction products and a densified micro-structure.Furthermore,the thermal treatment elicited modifications in the chemical As fractions within ABR,with limited impact on the As immobilization capacity of the prepared binders. 展开更多
关键词 cemented paste backfill bio-leaching residue arsenic immobilization binder hydration CALCINATION
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Constructing high-toughness polyimide binder with robust polarity and ion-conductive mechanisms ensuring long-term operational stability of silicon-based anodes
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作者 Yongjun Kang Nanxi Dong +5 位作者 Fangzhou Liu Daolei Lin Bingxue Liu Guofeng Tian Shengli Qi Dezhen Wu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第6期580-591,I0014,共13页
Silicon-based materials have demonstrated remarkable potential in high-energy-density batteries owing to their high theoretical capacity.However,the significant volume expansion of silicon seriously hinders its utiliz... Silicon-based materials have demonstrated remarkable potential in high-energy-density batteries owing to their high theoretical capacity.However,the significant volume expansion of silicon seriously hinders its utilization as a lithium-ion anode.Herein,a functionalized high-toughness polyimide(PDMI) is synthesized by copolymerizing the 4,4'-Oxydiphthalic anhydride(ODPA) with 4,4'-oxydianiline(ODA),2,3-diaminobenzoic acid(DABA),and 1,3-bis(3-aminopropyl)-tetramethyl disiloxane(DMS).The combination of rigid benzene rings and flexible oxygen groups(-O-) in the PDMI molecular chain via a rigidness/softness coupling mechanism contributes to high toughness.The plentiful polar carboxyl(-COOH) groups establish robust bonding strength.Rapid ionic transport is achieved by incorporating the flexible siloxane segment(Si-O-Si),which imparts high molecular chain motility and augments free volume holes to facilitate lithium-ion transport(9.8 × 10^(-10) cm^(2) s^(-1) vs.16 × 10^(-10) cm^(2) s~(-1)).As expected,the SiO_x@PDMI-1.5 electrode delivers brilliant long-term cycle performance with a remarkable capacity retention of 85% over 500 cycles at 1.3 A g^(-1).The well-designed functionalized polyimide also significantly enhances the electrochemical properties of Si nanoparticles electrode.Meanwhile,the assembled SiO_x@PDMI-1.5/NCM811 full cell delivers a high retention of 80% after 100 cycles.The perspective of the binder design strategy based on polyimide modification delivers a novel path toward high-capacity electrodes for high-energy-density batteries. 展开更多
关键词 Polyimide binder High toughness Robust ionic transport Silicon-based anodes Lithium-ion batteries
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