Quantum Spin Exchange Interactions to Accelerate the Redox Kinetics in Li–S Batteries

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.

A Survey of English Translation Studies of Lu You’s Poetry Based on the Data Analysis of Domestic Academic Journals (2001-2022)

This article presents a comprehensive analysis of the current state of research on the English translation of Lu You’s poetry, utilizing a data sample comprising research papers published in the CNKI Full-text Database from 2001 to 2022. Employing rigorous longitudinal statistical methods, the study examines the progress achieved over the past two decades. Notably, domestic researchers have displayed considerable interest in the study of Lu You’s English translation works since 2001. The research on the English translation of Lu You’s poetry reveals a diverse range of perspectives, indicating a rich body of scholarship. However, several challenges persist, including insufficient research, limited translation coverage, and a noticeable focus on specific poems such as “Phoenix Hairpin” in the realm of English translation research. Consequently, there is ample room for improvement in the quality of research output on the English translation of Lu You’s poems, as well as its recognition within the academic community. Building on these findings, it is argued that future investigations pertaining to the English translation of Lu You’s poetry should transcend the boundaries of textual analysis and encompass broader theoretical perspectives and research methodologies. By undertaking this shift, scholars will develop a more profound comprehension of Lu You’s poetic works and make substantive contributions to the field of translation studies. Thus, this article aims to bridge the gap between past research endeavors and future possibilities, serving as a guide and inspiration for scholars to embark on a more nuanced and enriching exploration of Lu You’s poetry as well as other Chinese literature classics.

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

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。

All-Solid-State Thin-Film Lithium-Sulfur Batteries

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.

Boosting Lean Electrolyte Lithium-Sulfur Battery Performance with Transition Metals: A Comprehensive Review

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.

Dual-Functional Organotelluride Additive for Highly Efficient Sulfur Redox Kinetics and Lithium Regulation in Lithium–Sulfur Batteries

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.

双金属MOFs碳化材料的结构对锂硫电池正极性能的影响

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。

Rational design of Fe/Co-based diatomic catalysts for Li–S batteries by first-principles calculations

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.

LiTFSI salt concentration effect to digest lithium polysulfides for high-loading sulfur electrodes

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.

Tunable vacancy defect chemistry on free-standing carbon cathode for lithium-sulfur batteries

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).

Rebellious Spirit in Shelley’s Poetry

雪莱的诗歌反映了他争取平等和自由的反叛思想。诗歌中揭示了他对上层阶级的诅咒 。

利用HVSR方法探测四川理县西山村滑坡速度结构

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.

The Influence of Miao Nationality’s Culture in Yuan Xiang Region on the Later Poetry Creation of Qu Yuan

Miao culture is one of the minority cultures in China.It also has a certain impact on the development of Chinese literature and poetry.Chu ci is a new poetic style created by Qu Yuan,an ancient poet in China.It is the first collection of romantic poetry in the history of Chinese literature.Qu Yuan’s poetry creation is related to his life experience.Qu Yuan was exiled to Yuan Xiang region,and he had been in contact with the Miao ancestors in Yuan Xiang area during the exile.Therefore,the Miao land culture in Yuan Xiang area has a profound influence on Qu Yuan’s later poetry creation.This paper,taking Qu Yuan’s later poetry as an example,analyzes the influence of Miao culture on Chu ci in Yuan Xiang area,introduces Qu Yuan’s life and how to contact Miao culture,and probes into the influence of Miao nationality’s religious thought,customs,language and culture,oral folk song and pan song on the later poetry creation of Qu Yuan.

Boundary of Domestication:Christianized Imagery in English Translations of Mao Zedong’s Poetry

The abundant imagery in Mao Zedong’s poetry is of great political and cultural significance and its English translation plays a major role in spreading New China’s influences worldwide.Comparison reveals that,in translations of a particular kind of imagery with supernatural meanings,some translators took a domesticating stance and Christianized some images with supernatural connotations,adding to them strong Western mythological features.It misinterprets the political and cultural connotations of the original,which is harmful to establish a proper political image and cultural confidence,and violates Mao’s translation thoughts and expectations.Christianization and its causes should be critically investigated.New boundaries should be set for foreignization and domestication methods.By viewing the relationships between the translator’s subjectivity and the author’s will,as well as the pursuit of translation effect and the defence of ideological security,new discourse will be explored to tell the Chinese stories with profound political and cultural thoughts in Mao’s poetry in a correct and well-accepted way.

Poetry Translation and Cultural Transmission——the English Version of the Classical Chinese Poem “Bring in the Wine”

This article,based on the English version of Li Bai's Classical Chinese Poem“Bring in the Wine”,explores the important position of cultural transmission in the English translation of the Classical Chinese Poem through the comparison of the cultural translation,and finally draws the rationality and feasibility of the creative translation techniques in the English translation of the Classical Chinese Poems.It points out that the alienation of the Chinese culture's external communication has ignored the reader's cultural acceptance ability and position of the western countries and regions dominated by the foreign countries.It is believed that in a long period of time,Chinese culture needs the translation of Chinese translators to dissimilation,the translation of foreign sinologists,domestication,and alienation,to meet the needs of different types of readers and to promote the Chinese culture to go out.

基于B/S模式的医学实验室信息平台(LIS)的设计与实现

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。

Li/S电池凝胶聚合物电解质的研究

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。

软包装Li/S电池的性能研究

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。

提高Li／S电池性能的研究进展

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。

B/S结构LIS系统的应用体会

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。