Densely Packed Graphene Nanomesh-Carbon Nanotube Hybrid Film for Ultra-High Volumetric Performance Supercapacitors
We report a novel strategy to prepare densely packed graphene nanomesh-carbon nanotube hybrid film(GNCN)through a simple graphene etching process and subsequent vacuum-assisted filtration method.The ion diffusion ability of the GNCN film is greatly enhanced due to the contribution of cross-plane diffusion from graphene nanomesh and in-plane diffusion from CNT-graphene sandwiched structure.In addition,carbon nanotubes can also efficiently improve the overall electrical and mechanical prop-erties of the hybrid film.Based on its high surface area,fast ion diffusion and high film density,the GNCN film electrode exhibits a specific capacitance of 294 F·g-1 at 5 mV·s-1,higher than the RGO film(185 F·g-1),as well as excellent rate capability.It is worth noting that the GNCN film electrode shows ultra-high volumetric capacitance of 331 F·cm-3.The strategy provides a facile and effective method to achieve high volumetric performance electrode materials for supercapacitor.
Dense graphene film Fast ion diffusion Supercapacitors Volumetric capacitance
Lili Jiang Lizhi Sheng Zhuangjun Fan
Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China
国内会议
长沙
英文
1-6
2015-11-05（万方平台首次上网日期，不代表论文的发表时间）