典型文献
A flexible design strategy to modify Ti3C2Tx MXene surface terminations via nucleophilic substitution for long-life Li-S batteries
文献摘要：
MXene-based materials have gained considerable attention for lithium-sulfur(Li-S)batteries cathode materials due to their superior electric conductivity and high affinitive to polysulfides.However,there are still challenges in modifying the surface functional groups of MXene to further improve the electro-chemical performance and increase the structure variety for MXene-based sulfur host.Herein,we report an efficient and flexible nucleophilic substitution(SN)strategy to modify the Ti3C2Tx surface terminations and purposefully designed Magnolol-modified Ti3C2Tx(M-Ti3C2Tx)as powerful cathode host materials.Benefiting from more C-Ti-0 bonds forming and diallyl groups terminations reducing after the dehalo-genation and nucleophilic addition reactions,the given M-T13C2Tx electrode could effectively suppress the lithium polysulfides shuttling via chemisorption and C—S covalent bond formation.Besides,the Magnolol-modified Ti3C2Tx significantly accelerates polysulfide redox reaction and reduces the activation energy of Li2S decomposition.As a result,the as-prepared M-Ti3C2Tx electrode displays an excellent rate capability and a high reversible capacity of 7.68 mAh cm-2 even under 7.2 mg cm-2 S-loaded with a low decay rate of 0.07％(from 2nd cycle).This flexible surface-modified strategy for MXene terminations is expected to be extended to other diverse MXene applications.
文献关键词：
中图分类号：
作者姓名：
Tianpeng Zhang;Wenlong Shao;Siyang Liu;Zihui Song;Runyue Mao;Xin Jin;Xigao Jian;Fangyuan Hu
作者机构：
School of Materials Science and Engineering,State Key Laboratory of Fine Chemicals,Key Laboratory of Energy Materials and Devices(Liaoning Province),Dalian University of Technology,Dalian 116024,Liaoning,China;State Key Laboratory of Fine Chemicals,Department of Polymer Science&Materials,Liaoning Province Engineering Research Centre of High Performances Resins,Dalian University of Technology,Dalian 116024,Liaoning,China
文献出处：
引用格式：
[1]Tianpeng Zhang;Wenlong Shao;Siyang Liu;Zihui Song;Runyue Mao;Xin Jin;Xigao Jian;Fangyuan Hu-.A flexible design strategy to modify Ti3C2Tx MXene surface terminations via nucleophilic substitution for long-life Li-S batteries)[J].能源化学,2022(11):349-358
A类：
affinitive,Magnolol,dehalo,T13C2Tx
B类：
flexible,strategy,Ti3C2Tx,MXene,surface,terminations,via,nucleophilic,substitution,long,life,batteries,materials,have,gained,considerable,attention,lithium,sulfur,cathode,due,their,superior,electric,conductivity,high,polysulfides,However,there,still,challenges,modifying,functional,groups,further,improve,chemical,performance,increase,structure,variety,host,Herein,report,efficient,SN,purposefully,designed,modified,powerful,Benefiting,from,more,bonds,forming,diallyl,reducing,after,genation,addition,reactions,given,electrode,could,effectively,suppress,shuttling,chemisorption,covalent,formation,Besides,significantly,accelerates,redox,reduces,activation,energy,Li2S,decomposition,result,prepared,displays,excellent,capability,reversible,capacity,mAh,even,under,loaded,low,decay,2nd,cycle,This,expected,be,extended,other,diverse,applications
AB值：
0.536417
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