石墨烯
超级电容器
材料科学
电容
纳米技术
石墨烯泡沫
化学工程
氧化石墨烯纸
电极
化学
工程类
物理化学
作者
Ning-Na Chen,Lu Ni,Jinhua Zhou,Guoyin Zhu,Qi Kang,Yu Zhang,Shanyong Chen,Weixin Zhou,Chunliang Lu,Jing Chen,Xiang Feng,Xizhang Wang,Xuefeng Guo,Luming Peng,Weiping Ding,Wei Hou
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2018-09-24
被引量:14
标识
DOI:10.1021/acsaem.8b00725
摘要
Hierarchically porous holey graphene/PANI/graphene nanohybrid is fabricated by adopting a facile two-step process in which PANI/graphene hybrid was first synthesized hydrothermally and then wrapped with a layer of holey graphene. The resulted sandwich-like structure cannot only promote electronic transmission and ionic diffusion, but also contribute to a prominent rate capability. A symmetric supercapacitor was assembled with the obtained holey graphene/PANI/graphene nanohybrid, exhibiting a maximum specific capacitance of 437 F·g–1 at 1 A·g–1, an energy density of 55 Wh·kg–1 at 900 W·kg–1, an ultrahigh-rate performance (retained 43% capacitance at 100 A·g–1), as well as a long-term life (84% retention after 5000 loops at 10 A·g–1). The present work may provide an insight for designing high-performance symmetric supercapacitor.
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