材料科学
超级电容器
石墨烯
电解质
电容
氧化物
润湿
电化学
电导率
水平扫描速率
化学工程
内阻
纳米技术
电极
复合材料
循环伏安法
功率(物理)
物理
工程类
量子力学
物理化学
化学
冶金
电池(电)
作者
Weili Zhang,Chuan Xu,Chaoqun Ma,Guoxian Li,Yuzuo Wang,Kaiyu Zhang,Feng Li,Chang Liu,Hui‐Ming Cheng,Youwei Du,Nujiang Tang,Wencai Ren
标识
DOI:10.1002/adma.201701677
摘要
An N‐superdoped 3D graphene network structure with an N‐doping level up to 15.8 at% for high‐performance supercapacitor is designed and synthesized, in which the graphene foam with high conductivity acts as skeleton and nested with N‐superdoped reduced graphene oxide arogels. This material shows a highly conductive interconnected 3D porous structure (3.33 S cm −1 ), large surface area (583 m 2 g −1 ), low internal resistance (0.4 Ω), good wettability, and a great number of active sites. Because of the multiple synergistic effects of these features, the supercapacitors based on this material show a remarkably excellent electrochemical behavior with a high specific capacitance (of up to 380, 332, and 245 F g −1 in alkaline, acidic, and neutral electrolytes measured in three‐electrode configuration, respectively, 297 F g −1 in alkaline electrolytes measured in two‐electrode configuration), good rate capability, excellent cycling stability (93.5% retention after 4600 cycles), and low internal resistance (0.4 Ω), resulting in high power density with proper high energy density.
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