典型文献
Pyrrole derivatives as interlayer modifier of Li-S batteries:Modulation of electrochemical performance by molecular perturbation
文献摘要：
The electrochemical performance of lithium-sulfur(Li-S)batteries is strongly hampered by the shuttle effect and slow redox kinetics of lithium polysulfides(LiPSs).Surface modified interlayer of a separator of Li-S batteries is demonstrated to be an effective strategy to overcome this problem.Herein,cobalt nanoparticles confined in nitrogen co-doped porous carbon framework(Co-CN)were developed from pyrolysis of ZIF-67 and used as interlayer of PP separator for Li-S batteries,and were functionalized by four pyrrole derivatives,1-phenylpyrrole,1-methyl pyrrole,1-(p-toluenesulfonyl)pyrrole,and 1-pyrrole,respectively,which were screened in terms of the electron-withdrawing/donating ability of the substituent groups on the pyrrolic nitrogen.The impact of the molecular structure of pyrrole deriva-tives on the interaction with LiPSs and the electrochemical performance of Li-S batteries were explored by nuclear magnetic resonance and theoretical calculation.It is uncovered that 1-phenylpyrrole shows the highest enhancement of redox kinetics of LiPSs,attributing to the optimal interaction with Co nanoparticles and LiPSs.Therefore,1-phenylpyrrole modified Co-CN interlayer enables the best electro-chemical performance for the Li-S batteries,delivering a specific capacity of 562 mAh g-1 at 5 C and a capacity of 538,526,and 449 mAh g-1 after 500 cycles at 1,2,and 3 C,respectively.At a high sulfur load-ing of 5.5 mg cm-2,it achieves a capacity of 440 mAh g-1 after 500 cycles at 1 C.This work reveals the interaction mechanism among LiPSs,Co nanoparticles and the molecular modifiers in improving the elec-trochemical performance of Li-S batteries.
文献关键词：
中图分类号：
作者姓名：
Jiajv Lin;Yuan Zhou;Jingbo Wen;Weijie Si;Hongcheng Gao;Gongming Wang;Xiongwu Kang
作者机构：
New Energy Research Institute,School of Environment and Energy,South China University of Technology,Guangzhou 510006,Guangdong,China;Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui,Provincial Education Department,College of Resources and Environment,Anqing Normal University,Anqing 246011,Anhui,China;Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry,University of Science&Technology of China,Hefei 230026,Anhui,China
文献出处：
引用格式：
[1]Jiajv Lin;Yuan Zhou;Jingbo Wen;Weijie Si;Hongcheng Gao;Gongming Wang;Xiongwu Kang-.Pyrrole derivatives as interlayer modifier of Li-S batteries:Modulation of electrochemical performance by molecular perturbation)[J].能源化学,2022(12):164-172
A类：
Pyrrole,phenylpyrrole,toluenesulfonyl
B类：
derivatives,as,interlayer,batteries,Modulation,electrochemical,performance,by,molecular,perturbation,lithium,sulfur,strongly,hampered,shuttle,slow,redox,kinetics,polysulfides,LiPSs,Surface,modified,separator,demonstrated,effective,strategy,overcome,this,problem,Herein,cobalt,nanoparticles,confined,nitrogen,doped,porous,carbon,framework,Co,CN,were,developed,from,pyrolysis,ZIF,used,PP,functionalized,four,methyl,respectively,which,screened,terms,electron,withdrawing,donating,ability,substituent,groups,pyrrolic,impact,structure,interaction,explored,nuclear,magnetic,resonance,theoretical,calculation,It,uncovered,that,shows,highest,enhancement,attributing,optimal,Therefore,enables,best,delivering,specific,capacity,mAh,after,cycles,At,load,achieves,This,reveals,mechanism,among,modifiers,improving
AB值：
0.44924
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