Spacing graphene and Ni-Co layered double hydroxides with polypyrrole for high-performance supercapacitors
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第20期
论文作者：Jing Liang Cuili Xiang Yongjin Zou Xuebu Hu Hailiang Chu Shujun Qiu Fen Xu Lixian Sun
文章页码：190 - 197
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（2 D） 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.
Jing Liang1，Cuili Xiang1，Yongjin Zou1，Xuebu Hu2，Hailiang Chu1，Shujun Qiu1，Fen Xu1，Lixian Sun1
1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology2. Chongqing University of Technology, College of Chemistry & Chemical Engineering
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（2 D） 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.
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