Nitrogen‐Superdoped 3D Graphene Networks for High‐Performance Supercapacitors

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 · 发表于：Advanced Materials · 年份：2017 · DOI：10.1002/adma.201701677 · 被引用次数：313 · 研究领域：Supercapacitor Materials and Fabrication、Advancements in Battery Materials、Conducting polymers and applications

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 m2 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.