Designing N-doped graphene/ReSe_(2)/Ti_(3)C_(2) MXene heterostructure frameworks as promising anodes for high-rate potassium-ion batteries

查看全文 作　　者：Zhou [1,2]Xia;Xiwen [1]Chen;Haina [2]Cia;Zhaodi [1]Fan;Yuyang [1]Yi;Wanjian [1,2]Yin;Nan [1,2]Wei;Jingsheng [1]Cai;Yanfeng [2,3]Zhang;Jingyu [1,2]Sun

机构地区：[1]College of Energy,Soochow Institute for Energy and Materials Innovations(SIEMIS),Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province,Soochow University,Suzhou 215006,Jiangsu,China;[2]Beijing Graphene Institute(BG1),Beijing 100095,China;[3]Center for Nanochemistry(CNC),Academy for Advanced Interdisciplinary Studies.Department of Materials Science and Engineering,College of Engineering,Peking University,Beijing 100871,China

出　　处：《Journal of Energy Chemistry》索引2021年第30卷第2期,共9页

基　　金：supported by the National Natural Science Foundation of China (51702225);the National Key Research and Development Program (2016YFA0200103);the Natural Science Foundation of Jiangsu Province (BK20170336);the support from Suzhou Key Laboratory for Advanced Carbon Materials;Wearable Energy Technologies, Suzhou, China。 摘　　要：Developing high-performance anodes for potassium ion batteries(KIBs) is of paramount significance but remains challenging.In the normal sense,electrode materials are prepared by ubiquitous wet chemical routes,which otherwise might not be versatile enough to create desired heterostructures and/or form clean interfacial areas for fast transport of K-ions and electrons.Along this line,rate capability/cycling stability of resulting KIBs are greatly handicapped.Herein we present an all-chemical vapor deposition approach to harness the direct synthesis of nitrogen-doped graphene(NG)/rhenium diselenide(ReSe_2)hybrids over three-dimensional MXene supports as superior heterostructure anode material for KIBs.In such an innovative design,1 T'-ReSe2 nanoparticles are sandwiched in between the NG coatings and MXene frameworks via strong interfacial interactions,thereby affording facile K~+ diffusion,enhancing overall conductivity,boosting high-power performance and reinforcing structural stability of electrodes.Thus-constructed anode delivers an excellent rate performance of 138 mAh g^(-1) at 10.0 A g^(-1) and a high reversible capacity of 90 mAh g^(-1) at 5 A g^(-1) after 300 cycles.Furthermore,the potassium storage mechanism has been systematically probed by advanced in situlex situ characterization techniques in combination with first principles computations. 关键词：K-ion batteries High-rate ReSe_(2) N-doped graphene HETEROSTRUCTURE

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Designing N-doped graphene/ReSe_(2)/Ti_(3)C_(2) MXene heterostructure frameworks as promising anodes for high-rate potassium-ion batteries

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