Spacing graphene and Ni-Co layered double hydroxides with polypyrrole for high-performance supercapacitors  

作　　者：Jing Liang Cuili Xiang Yongjin Zou Xuebu Hu Hailiang Chu Shujun Qiu Fen Xu Lixian Sun 

机构地区：[1]Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China [2]Chongqing University of Technology,College of Chemistry&Chemical Engineering,Chongqing 400054,China

出　　处：《Journal of Materials Science & Technology》2020年第20期190-197,共8页材料科学技术（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51861005 and 51861004);the Innovation Project of Guangxi Graduate Education(No.YCSW2019149);Guangxi Natural Science Foundation(No.2017AD23029)。

摘　　要：The urgent need of high-performance of energy storage devices triggers us to design newly class of materials.Generally,the materials feature with high conductivity,abundant pore s and excellent stability.Here,a sandwiched hybrid composite containing reduced graphene oxide,polypyrrole and Ni-Co layered double hydroxides(RGO/PPy/NiCo-LDH) was prepared in a facile way.The polypyrrole was incorporated in the two dimensional(2D) nanosheets,which not only serve as the spacer to increase the surface area,but also enhance the conductivity of the nanocomposite.The obtained architecture was employed as an advanced electrode in a supercapacitor.The electrode shows an ultrahigh specific capacitance(2534 F g^-1 at 1 A g^-1) and good cycling efficiency(78 % after 5000 cycles).Moreover,an asymmetric cell based RGO/PPy/NiCo-LDH composite demonstrates excellent electrochemical properties and good prospect of practical use.

关 键 词：GRAPHENE Ni-Co layered double hydroxides POLYPYRROLE SUPERCAPACITOR Porous carbon 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]