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On Translation of Children’s Literature Based on Reception Aesthetics:A Case Study of The Secret Garden
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作者 HOU Wen-lan LI Ju-yuan 《Journal of Literature and Art Studies》 2024年第3期194-200,共7页
Grounded in reader-centered theories,Reception Aesthetics prioritizes the active engagement and acceptance of target readers.This study examines the translation of children’s literature through the lens of Reception ... Grounded in reader-centered theories,Reception Aesthetics prioritizes the active engagement and acceptance of target readers.This study examines the translation of children’s literature through the lens of Reception Aesthetics,using Li Wenjun’s rendition of The Secret Garden as a case study.The objective is to scrutinize various aspects of the translation-including vocabulary,syntax,rhetorical devices,and cultural nuances-and to discern how the adaptation and application of diverse translation strategies cater to the aesthetic expectations. 展开更多
关键词 Reception Aesthetics translation of children’s literature The secret garden
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Quantum Spin Exchange Interactions to Accelerate the Redox Kinetics in Li–S Batteries
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作者 Yu Du Weijie Chen +4 位作者 Yu Wang Yue Yu Kai Guo Gan Qu Jianan Zhang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第5期370-383,共14页
Spin-engineering with electrocatalysts have been exploited to suppress the“shuttle effect”in Li–S batteries.Spin selec-tion,spin-dependent electron mobility and spin potentials in activation barriers can be optimiz... Spin-engineering with electrocatalysts have been exploited to suppress the“shuttle effect”in Li–S batteries.Spin selec-tion,spin-dependent electron mobility and spin potentials in activation barriers can be optimized as quantum spin exchange interactions lead-ing to a significant reduction of the electronic repulsions in the orbitals of catalysts.Herein,we anchor the MgPc molecules on fluorinated carbon nanotubes(MgPc@FCNT),which exhibits the single active Mg sites with axial displacement.According to the density functional theory calculations,the electronic spin polarization in MgPc@FCNT not only increases the adsorption energy toward LiPSs intermediates but also facilitates the tunneling process of electron in Li–S batter-ies.As a result,the MgPc@FCNT provides an initial capacity of 6.1 mAh cm^(-2) even when the high sulfur loading is 4.5 mg cm^(-2),and still maintains 5.1 mAh cm^(-2) after 100 cycles.This work provides a new perspective to extend the main group single-atom catalysts enabling high-performance Li–S batteries. 展开更多
关键词 Metal phthalocyanines spin polarization ELECTROCATALYsIs lis batteries
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Li_(2)S掺杂对富锂锰基材料首次库仑效率的提升效果研究
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作者 陈垒 王皓 +3 位作者 张文慧 洪灿灿 王点点 赵金安 《化工新型材料》 CAS CSCD 北大核心 2023年第4期175-178,190,共5页
富锂锰基材料(LRM)由于电压平台高、比容量高,在锂电池材料研究中受到广泛关注。针对富锂锰基材料首次充放电库仑效率较低的问题,采用Li_(2)S对富锂锰基材料(LRM)进行掺杂改性制备得到LRM-S材料。结果表明:LRM和LRM-S的晶体结构相近,具... 富锂锰基材料(LRM)由于电压平台高、比容量高,在锂电池材料研究中受到广泛关注。针对富锂锰基材料首次充放电库仑效率较低的问题,采用Li_(2)S对富锂锰基材料(LRM)进行掺杂改性制备得到LRM-S材料。结果表明:LRM和LRM-S的晶体结构相近,具有层状晶体结构。扫描电镜分析表明,LRM-S材料由10~20nm的一次颗粒团聚而成。元素分析表明LRM-S材料中含有均匀分散的S元素。电化学分析表明,LRM的首次充电比容量为291.80mAh/g,首次放电比容量为188.63mAh/g,首次库仑效率为64.64%。Li_(2)S掺杂改性材料LRM-S的首次充电比容量为387.04mAh/g,首次放电比容量为272.64mAh/g,首次库仑效率为70.44%,在首次充放电比容量和效率方面均有显著提升。 展开更多
关键词 富锂锰基 li_(2)s 掺杂改性 首次库仑效率 电化学性能测试
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All-Solid-State Thin-Film Lithium-Sulfur Batteries 被引量:6
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作者 Renming Deng Bingyuan Ke +5 位作者 Yonghui Xie Shoulin Cheng Congcong Zhang Hong Zhang Bingan Lu Xinghui Wang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第5期326-338,共13页
Lithium-sulfur(Li-S)system coupled with thin-film solid electrolyte as a novel high-energy micro-battery has enormous potential for complementing embedded energy harvesters to enable the autonomy of the Internet of Th... Lithium-sulfur(Li-S)system coupled with thin-film solid electrolyte as a novel high-energy micro-battery has enormous potential for complementing embedded energy harvesters to enable the autonomy of the Internet of Things microdevice.However,the volatility in high vacuum and intrinsic sluggish kinetics of S hinder researchers from empirically integrating it into allsolid-state thin-film batteries,leading to inexperience in fabricating all-solid-state thin-film Li-S batteries(TFLSBs).Herein,for the first time,TFLSBs have been successfully constructed by stacking vertical graphene nanosheets-Li2S(VGsLi2S)composite thin-film cathode,lithium-phosphorous-oxynitride(LiPON)thin-film solid electrolyte,and Li metal anode.Fundamentally eliminating Lipolysulfide shuttle effect and maintaining a stable VGs-Li2S/LiPON interface upon prolonged cycles have been well identified by employing the solid-state Li-S system with an“unlimited Li”reservoir,which exhibits excellent longterm cycling stability with a capacity retention of 81%for 3,000 cycles,and an exceptional high temperature tolerance up to 60℃.More impressively,VGs-Li2S-based TFLSBs with evaporated-Li thin-film anode also demonstrate outstanding cycling performance over 500 cycles with a high Coulombic efficiency of 99.71%.Collectively,this study presents a new development strategy for secure and high-performance rechargeable all-solid-state thin-film batteries. 展开更多
关键词 All-solid-state thin-film batteries li-s batteries Vertical graphene nanosheets lithium phosphorous oxynitride li2s
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Dual-Functional Organotelluride Additive for Highly Efficient Sulfur Redox Kinetics and Lithium Regulation in Lithium–Sulfur Batteries 被引量:2
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作者 Wei Zhang Fenfen Ma +5 位作者 Qiang Wu Ziqi Zeng Wei Zhong Shijie Cheng Xin Chen Jia Xie 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第3期126-133,共8页
High energy density and low cost made lithium–sulfur(Li–S)batteries appealing for the next-generation energy storage devices.However,their commercial viability is seriously challenged by serious polysulfide shuttle ... High energy density and low cost made lithium–sulfur(Li–S)batteries appealing for the next-generation energy storage devices.However,their commercial viability is seriously challenged by serious polysulfide shuttle effect,sluggish sulfur kinetics,and uncontrollable dendritic Li growth.Herein,a dual-functional electrolyte additive,diphenyl ditelluride(DPDTe)is reported for Li–S battery.For sulfur cathodes,DPDTe works as a redox mediator to accelerate redox kinetics of sulfur,in which Te radical-mediated catalytic cycle at the solid–liquid interface contributes significantly to the whole process.For lithium anodes,DPDTe can react with lithium metal to form a smooth and stable organic–inorganic hybrid solid-electrolyte interphase(SEI),enabling homogeneous lithium deposition for suppressing dendrite growth.Consequently,the Li–S battery with DPDTe exhibits remarkable cycling stability and superb rate capability,with a high capacity up to 1227.3 mAh g^(-1)and stable cycling over 300 cycles.Moreover,a Li–S pouch cell with DPDTe is evaluated as the proof of concept.This work demonstrates that organotelluride compounds can be used as functional electrolyte additives and offers new insights and opportunities for practical Li–S batteries. 展开更多
关键词 electrolyte additive li anode li2 s deposition lis battery sulfur kinetics
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Boosting Lean Electrolyte Lithium-Sulfur Battery Performance with Transition Metals: A Comprehensive Review 被引量:3
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作者 Hui Pan Zhibin Cheng +8 位作者 Zhenyu Zhou Sijie Xie Wei Zhang Ning Han Wei Guo Jan Fransaer Jiangshui Luo Andreu Cabot Michael Wübbenhorst 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第10期53-100,共48页
Lithium–sulfur(Li–S) batteries have received widespread attention, and lean electrolyte Li–S batteries have attracted additional interest because of their higher energy densities. This review systematically analyze... Lithium–sulfur(Li–S) batteries have received widespread attention, and lean electrolyte Li–S batteries have attracted additional interest because of their higher energy densities. This review systematically analyzes the effect of the electrolyte-to-sulfur(E/S) ratios on battery energy density and the challenges for sulfur reduction reactions(SRR) under lean electrolyte conditions. Accordingly, we review the use of various polar transition metal sulfur hosts as corresponding solutions to facilitate SRR kinetics at low E/S ratios(< 10 μL mg~(-1)), and the strengths and limitations of different transition metal compounds are presented and discussed from a fundamental perspective. Subsequently, three promising strategies for sulfur hosts that act as anchors and catalysts are proposed to boost lean electrolyte Li–S battery performance. Finally, an outlook is provided to guide future research on high energy density Li–S batteries. 展开更多
关键词 Transition metals Lean electrolyte sulfur reduction reactions lis batteries
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双金属MOFs碳化材料的结构对锂硫电池正极性能的影响 被引量:1
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作者 曹翔宇 张秀玲 +2 位作者 杜依洋 马成乡 闫娟枝 《化工新型材料》 CAS CSCD 北大核心 2024年第1期150-155,160,共7页
利用硝酸钴和铁氰化钾在水溶液中沉淀反应以及ZIF-8在水溶液中的部分分解,分别制备了2种组成相近但结构不同的双金属有机框架前驱体Co-Fe precursor和ZCF precursor。经过多巴胺包覆,对2种产品在氩气气氛下退火获得碳化产物。将碳化产... 利用硝酸钴和铁氰化钾在水溶液中沉淀反应以及ZIF-8在水溶液中的部分分解,分别制备了2种组成相近但结构不同的双金属有机框架前驱体Co-Fe precursor和ZCF precursor。经过多巴胺包覆,对2种产品在氩气气氛下退火获得碳化产物。将碳化产物与纳米硫粉混合得到的碳/硫复合材料(E-CoFeCN@C/S、E-ZCF@C/S)分别作为正极,组装扣式锂硫电池并测试电化学性能。利用X射线衍射仪、扫描电子显微镜、透射电子显微镜、热重分析仪进行形貌和结构分析。在组成相似的情况下,核壳结构碳载体(E-CoFeCN@C)与发散式结构碳载体(E-ZCF@C)对锂硫电池性能的影响呈现出“此消彼长”的特点:E-ZCF@C/S在循环伏安测试中表现出更小的极化以及更强的电流响应,在电化学阻抗测试中表现出更低的电荷转移阻抗,表明该材料有利于促进正极电荷传递过程,即加快电极反应动力学。E-ZCF@C/S在0.2C倍率下放电初始比容量为1211.3mAh/g,在2C倍率下放电初始比容量为794mAh/g,均优于E-CoFeCN@C/S。而核壳结构的优势主要体现在容量衰减方面,E-CoFeCN@C/S在0.2C倍率下经过100次循环后平均衰减率为0.074%(E-ZCF@C/S为0.26%),在2C倍率下循环300次后平均衰减率为0.047%(E-ZCF@C/S为0.13%),说明核壳结构对活性物质的锚固作用明显而对电荷转移不利。 展开更多
关键词 双金属MOFs 锂硫电池 材料结构 电化学性能
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Tunable vacancy defect chemistry on free-standing carbon cathode for lithium-sulfur batteries 被引量:2
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作者 Xi Zhang Xiaohong Liu +1 位作者 Wei Zhang Yingze Song 《Green Energy & Environment》 SCIE EI CSCD 2023年第2期354-359,共6页
The defect chemistry is successfully modulated on free-standing and binder-free carbon cathodes for highly efficient Li-S redox reactions.Such rationally regulated defect engineering realizes the synchronization of io... The defect chemistry is successfully modulated on free-standing and binder-free carbon cathodes for highly efficient Li-S redox reactions.Such rationally regulated defect engineering realizes the synchronization of ion/electron-conductive and defect-rich networks on the threedimension carbon cathode,leading to its tunable activity for both relieving the shuttle phenomenon and accelerating the sulfur redox reaction kinetics.As expected,the defective carbon cathode harvests a high rate capacity of 1217.8 mAh g^(-1)at 0.2 C and a superior capacity retention of61.7%at 2 C after 500 cycles.Even under the sulfur mass loading of 11.1 mg cm^(-2),the defective cathode still holds a remarkable areal capacity of 8.5 mAh cm^(-2). 展开更多
关键词 lis chemistry Tunable vacancy defects Free-standing cathode Electrocatalytic activity sulfur redox reaction kinetics
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LiTFSI salt concentration effect to digest lithium polysulfides for high-loading sulfur electrodes 被引量:1
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作者 Jin-Kwang Song Moonsoo Kim +1 位作者 Seongbae Park Young-Jun Kim 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第3期574-581,I0015,共9页
Sulfur utilization improvement and control of dissolved lithium polysulfide(LiPS;Li_(2)S x,2<x≤8)are cru-cial aspects of the development of lithium-sulfur(Li-S)batteries,especially in high-loading sulfur elec-trode... Sulfur utilization improvement and control of dissolved lithium polysulfide(LiPS;Li_(2)S x,2<x≤8)are cru-cial aspects of the development of lithium-sulfur(Li-S)batteries,especially in high-loading sulfur elec-trodes and low electrolyte/sulfur(E/S)ratios.The sluggish reaction in the low E/S ratio induces poor LiPS solubility and unstable Li_(2)S electrodeposition,resulting in limited sulfur utilization,especially under high-loading sulfur electrode.In this study,we report on salt concentration effects that improve sulfur utilization with a high-loading cathode(6 mgs ulfurcm^(-2)),a high sulfur content(80 wt%)and a low E/S ratio(5 m L gs ulfur^(-1)).On the basis of the rapid LiPS dissolving in a low concentration electrolyte,we estab-lished that the quantity of Li_(2)S electrodeposition from a high Li+diffusion coefficient,referring to the reduction of LiPS precipitation,was significantly enhanced by a faster kinetic.These results demonstrate the importance of kinetic factors for the rate capability and cycle life stability of Li-S battery electrolytes through high Li_(2)S deposition under high-loading sulfur electrode. 展开更多
关键词 lithium-sulfur battery Electrolyte concentration li2s deposition High-loading sulfur electrode
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Rational design of Fe/Co-based diatomic catalysts for Li–S batteries by first-principles calculations
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作者 张晓雅 程莹洁 +5 位作者 赵春宇 高敬莞 阚东晓 王义展 齐舵 魏英进 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期402-407,共6页
Fe/Co-based diatomic catalysts decorated on an N-doped graphene substrate are investigated by first-principles calculations to improve the electrochemical properties of Li–S batteries.Our results demonstrate that Fe ... Fe/Co-based diatomic catalysts decorated on an N-doped graphene substrate are investigated by first-principles calculations to improve the electrochemical properties of Li–S batteries.Our results demonstrate that Fe CoN8@Gra not only possesses moderate adsorption energies towards Li2Snspecies,but also exhibits superior catalytic activity for both reduction and oxidation reactions of the sulfur cathode.Moreover,the metallic property of the diatomic catalysts can be well maintained after Li2Snadsorption,which could help the sulfur cathode to maintain high conductivity during the whole charge–discharge process.Given these exceptional properties,it is expected that Fe CoN8@Gra could be a promising diatomic catalyst for Li–S batteries and afford insights for further development of advanced Li–S batteries. 展开更多
关键词 lis battery diatomic catalyst POLYsULFIDEs first-principles calculations
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Taxonomic Diversity and Structure of Gastropods in Stations at Salvia officinalis L. (Lamiaceae) in the Gardens of Tlemcen Park (Tlemcen Mounts, Algeria)
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作者 Amina Damerdji 《American Journal of Plant Sciences》 CAS 2022年第8期1145-1157,共13页
The Tlemcen region is located in north-western Algeria and is characterized by a semi-arid bioclimate. An approach to the diversity of the malacofauna associated with Salvia officinalis was carried out in three statio... The Tlemcen region is located in north-western Algeria and is characterized by a semi-arid bioclimate. An approach to the diversity of the malacofauna associated with Salvia officinalis was carried out in three stations belonging to this area from February to June 2015. The specific richness of the Gastropods is 9 divided into three families: Milacidae, Helicidae and Subulinidae. The second includes two subfamilies including that of Helicinae and that of Helicellinae. Two species are constant, 01 is incidental and the 06 others are very accidental. The relative importance of snails fluctuates according to the stations and according to the months and the seasons. In winter, in the first station the malacological richness is equal to 6. In February, the specific richness is relatively important in the 2nd station with a value equal to 7. Milax nigricans (Milacidae) has a frequency of 10% in station 1 and has a density of 0.1 in this same station. It is absent in the other two stations. Euparypha pisana has a frequency of 60% in station 3 and an abundance of 0.57 in this same station. 展开更多
关键词 salvia officinalis Malacofauna DIVERsITY BIOECOLOGY sEAsONs MONTHs Vertical Distribution garden’s Park of Tlemcen
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利用HVSR方法探测四川理县西山村滑坡速度结构
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作者 孙晓倩 储日升 +2 位作者 曾求 盛敏汉 危自根 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2024年第4期1515-1526,共12页
HVSR(Horizontal-to-Vertical Spectral Ratio)是地震背景噪声水平分量与垂直分量的频谱比,常被用来探测起伏地形较小的浅地表速度结构.然而,高起伏地形下该方法的适用性还需要仔细研究.本文探讨利用HVSR方法探测四川理县西山村滑坡的... HVSR(Horizontal-to-Vertical Spectral Ratio)是地震背景噪声水平分量与垂直分量的频谱比,常被用来探测起伏地形较小的浅地表速度结构.然而,高起伏地形下该方法的适用性还需要仔细研究.本文探讨利用HVSR方法探测四川理县西山村滑坡的速度结构.我们首先将ENZ坐标系下三分量地震数据旋转到垂直于地形自由面的LQT坐标系,分别计算了两个坐标系下2 h地震背景噪声数据的HVSR曲线,对比结果发现,LQT坐标系下三分量数据的HVSR峰值频率更能反映地下结构信息.然后,本文反演了29个台站LQT坐标系的HVSR曲线,获得了滑坡体堆积物及基岩的一维S波速度结构.西山村滑坡体堆积物的S波速度范围为50~1000 m·s^(-1),滑坡厚度23~130 m.滑坡体西侧边缘地下40~120 m处存在10~20 m的低速层,表明该位置抗剪强度相对较弱,是潜在的滑动危险区域.对数据进行坐标系转换后,HVSR方法能够利用较短的观测数据获取可靠的滑坡体速度结构,为滑坡体积估算、脆弱位置识别、灾害评估提供重要信息. 展开更多
关键词 理县西山村滑坡 HVsR s波速度结构 地震背景噪声
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基于B/S模式的医学实验室信息平台(LIS)的设计与实现 被引量:10
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作者 贺建峰 宝媛媛 +3 位作者 张俊 胡杨升 张昊 张明军 《计算机应用与软件》 CSCD 2016年第3期83-86,共4页
随着医疗信息化的发展和对检验要求的提高,医学检验实现信息化管理已成为必然趋势,这也使得LIS在专业细分多、技术要素复杂的医学实验室信息管理中越来越重要。然而,传统的LIS大多基于C/S模式进行开发,这种模式开发的平台安装繁琐,扩展... 随着医疗信息化的发展和对检验要求的提高,医学检验实现信息化管理已成为必然趋势,这也使得LIS在专业细分多、技术要素复杂的医学实验室信息管理中越来越重要。然而,传统的LIS大多基于C/S模式进行开发,这种模式开发的平台安装繁琐,扩展性和分布能力差,实现维护和平台移植困难。针对这些问题,基于B/S模式,运用SSH框架和Ext JS技术对LIS平台进行研究并设计开发了一种医学实验室信息平台。结果表明,该平台有效地解决了传统LIS的许多不足,完成并实现了医学实验室的规范管理与信息融合,提高了工作效率。 展开更多
关键词 检验科 lis C/s B/s模式 ssH框架 ExtJs技术
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Li/S电池凝胶聚合物电解质的研究 被引量:7
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作者 马萍 徐宇虹 +2 位作者 张宝宏 殷金玲 孟祥利 《电池》 CAS CSCD 北大核心 2006年第6期426-428,共3页
通过溶液浇注和电解液吸收的方法,制备了PVDF-PEO类凝胶聚合物电解质膜,该膜有良好的透明性和柔韧性。PVDF-PEO凝胶聚合物电解质[n(PEO):n(PVDF)=0.5]在室温下的电导率最高可达7.03 mS/cm,吸液率达76.1%,电化学稳定窗口达4.1 V。将该电... 通过溶液浇注和电解液吸收的方法,制备了PVDF-PEO类凝胶聚合物电解质膜,该膜有良好的透明性和柔韧性。PVDF-PEO凝胶聚合物电解质[n(PEO):n(PVDF)=0.5]在室温下的电导率最高可达7.03 mS/cm,吸液率达76.1%,电化学稳定窗口达4.1 V。将该电解质[n(PEO)∶n(PVDF)]应用在Li/S电池上,经过15次充放电循环后,电池的放电比容量仍在400 mAh/g以上。 展开更多
关键词 凝胶聚合物电解质 PVDF PEO li/s电池
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软包装Li/S电池的性能研究 被引量:3
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作者 余仲宝 王维坤 +1 位作者 王安邦 杨裕生 《电池》 CAS CSCD 北大核心 2007年第4期247-249,共3页
应用软包装技术,用S-C复合材料作为Li/S电池的正极材料,组装了软包装Li/S电池。性能测试结果表明:120 mA首次放电容量达1700 mAh,比能量达300 Wh/kg;循环50次(100 mA)后的容量保持率约为60%。在0℃和-20℃下的放电容量(100 mA)分别达25... 应用软包装技术,用S-C复合材料作为Li/S电池的正极材料,组装了软包装Li/S电池。性能测试结果表明:120 mA首次放电容量达1700 mAh,比能量达300 Wh/kg;循环50次(100 mA)后的容量保持率约为60%。在0℃和-20℃下的放电容量(100 mA)分别达25℃下放电容量的90%和40%。电池在过充电和短路等滥用条件下,不燃烧、不爆炸。 展开更多
关键词 软包装 li/s电池 性能
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提高Li/S电池性能的研究进展 被引量:2
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作者 张勇 武行兵 +1 位作者 张爱勤 王力臻 《电池》 CAS CSCD 北大核心 2008年第4期257-259,共3页
综述了提高Li/S电池性能的研究进展,包括比容量、循环寿命、高功率性能和高低温性能;对研究方向作了简单的评述。
关键词 li/s电池 电化学性能 研究进展
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B/S结构LIS系统的应用体会 被引量:6
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作者 王会中 张金树 +1 位作者 孙宇 高德禄 《国际检验医学杂志》 CAS 2011年第5期621-622,共2页
当前,现代检验医学已步入了一个以自动化、信息化、网络化为主要特征的新时期。检验水平和检测手段日新月异,临床检验工作日趋自动化、规范化、信息化,因而建立一套功能强大的实验室信息系统(laboratory information system,LIS)... 当前,现代检验医学已步入了一个以自动化、信息化、网络化为主要特征的新时期。检验水平和检测手段日新月异,临床检验工作日趋自动化、规范化、信息化,因而建立一套功能强大的实验室信息系统(laboratory information system,LIS)是现代临床实验室必不可少的。如今的LIS已不仅仅局限于标本管理、数据采集、报告打印等简单的功能,信息技术的发展、医疗体制改革的要求以及各种严格的行业规范,将LIS推向了前所未有的高度。 展开更多
关键词 lis系统 B/s结构 实验室信息系统 临床实验室 应用 医疗体制改革 检验医学 检验工作
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电解质体系对FeS_2/LiSi热电池激活时间的影响研究 被引量:2
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作者 康博 邢永慧 +2 位作者 赵亚旭 曹军记 林海波 《电源技术》 CAS CSCD 北大核心 2015年第10期2153-2154,共2页
采用空载和带载两种放电方式,研究了热电池常用的二元和三元全锂电解质体系对Fe S2/Li Si热电池激活时间的影响。实验结果表明:空载放电时,二元电解质激活时间短;带载放电时,三元全锂电解质激活时间短。
关键词 电解质 FE s2/li si热电池 激活时间
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不同生物炭材料的制备及其在Li-S电池中的应用(英文) 被引量:7
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作者 李君涛 吴娇红 +1 位作者 张涛 黄令 《物理化学学报》 SCIE CAS CSCD 北大核心 2017年第5期968-975,共8页
通过可再生生物质制备的生物炭具有成本低、环保和资源可再生的优势。本研究以分布广泛的稻谷壳、芒草、杉木和柚子皮等生物质为原料,制备了4种不同类型生物炭,然后研究了其作为锂-硫电池硫/碳正极的载体的性能。研究表明由稻谷壳制备的... 通过可再生生物质制备的生物炭具有成本低、环保和资源可再生的优势。本研究以分布广泛的稻谷壳、芒草、杉木和柚子皮等生物质为原料,制备了4种不同类型生物炭,然后研究了其作为锂-硫电池硫/碳正极的载体的性能。研究表明由稻谷壳制备的硫/生物炭正极材料表现出最高的比容量和最优的循环稳定性。为了进一步改善其电性能,以SiO_2溶胶为模板制备了具有高孔隙率的稻谷壳生物炭,其多孔结构可有效抑制多硫化物的溶解。由此得到的硫/生物炭(硫含量为60%(w,质量分数))材料中的硫以无定型态均匀地分散在碳载体中。该材料表现出更优异的电化学性能:在0.2C(1C=1675 m A?g^(-1))倍率下,首周放电容量为1534.1 mAh?g^(-1),循环100周后仍可保持在783.7 mAh?g^(-1);倍率性能测试中,在2.0C倍率下,材料的可逆容量为485.3 mAh?g^(-1)。 展开更多
关键词 锂硫电池 复合物 稻壳 芒草 杉木 柚子皮
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Research on Monitoring and Early-warning Standards of Ancient and Famous Trees Protection in the Humble Administrator's Garden 被引量:1
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作者 魏胜林 茅晓伟 +4 位作者 肖湘东 付哓渝 向华明 陈荣伟 徐梦萤 《Journal of Landscape Research》 2010年第5期39-44,55,共7页
Based on the current situation and symptoms of the trees' growth in the Humble Administrator's Garden,this paper put forward corresponding monitoring and early-warning standards and technical measures of the a... Based on the current situation and symptoms of the trees' growth in the Humble Administrator's Garden,this paper put forward corresponding monitoring and early-warning standards and technical measures of the ancient and famous trees protection in the Humble Administrator's Garden specifically.The aim of doing this is to establish a scientific basis for the protection of the ancient and famous trees in the Humble Administrator's Garden by setting up systematic fundamental data,dynamic protection standard grades and technique measures of protecting the trees.The main symptom of trees in the Humble Administrator's Garden is the erosion and decay of the tree trunks.Fifteen tree trunks need technical protection,which holds 65.22% of the total sum of trees in the Humble Administrator's Garden.Therefore,much more emphasis should be paid in strengthening technical protection procedures of monitoring and early warning of the tree trunks in the future protection of the ancient and famous trees in the garden.Besides,the rejuvenation technique of rooting zone and rooting system,tree pruning technique as well as tree supporting measures according to the specific condition and symptom of the trees should be concerned with in order to protect the ancient and famous trees in the Humble Administrator's Garden in a more scientific and effective way. 展开更多
关键词 The Humble Administrator’s garden Ancient and FAMOUs trees MONITORING Early WARNING PROTECTION techniques
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