Liquid-phase Exfoliated WS2-Graphene Composite Anodes for Potassium-ion Batteries  

作　　者：WANG Wei BAO Jing-Ze SUN Chuan-Fu 王维;包敬泽;孙传福(CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [2]University of Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Journal of Structural Chemistry》2020年第3期493-499,378,共8页结构化学（英文）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21771180,51702318);Natural Science Foundation of Fujian Province(No.2018J01031)。

摘　　要：Tungsten disulfide(WS2) has been recognized as a promising anode material for rechargeable potassium-ion batteries(PIBs). However, its K-ion intercalation capacity is limited to ~60 mAh·g^(-1). Here, we report a WS2-graphene composite anode which is fabricated through simple filtration of liquid-phase exfoliated WS2 and graphene nanosheet delivers a significantly improved specific capacity of 137 mAh·g^(-1) at a current density of 10 mA·g^(-1). The composite anodes also exhibit remarkable rate capability and long-term cyclability over 500 cycles. These results highlight the WS2-graphene composite structure as a promising anode material for long lifespan rechargeable potassium-ion batteries.

关 键 词：tungsten DISULFIDE LIQUID-PHASE EXFOLIATION K-ion battery GRAPHEME 

分 类 号：TB33[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]