Details

Autor(en) / Beteiligte

• Zhang, Weili
• Xu, Chuan
• Ma, Chaoqun
• Li, Guoxian
• Wang, Yuzuo
• Zhang, Kaiyu
• Li, Feng
• Liu, Chang
• Cheng, Hui‐Ming
• Du, Youwei
• Tang, Nujiang
• Ren, Wencai

Titel

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

Ist Teil von

• Advanced materials (Weinheim), 2017-09, Vol.29 (36), p.n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2017

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• 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. A N‐superdoped 3D graphene network structure is synthesized to achieve a highly conductive interconnected 3D porous structure and high N‐doping level simultaneously. The supercapacitors based on this material show a remarkably high capacity, good rate capability, and excellent cycling stability.