Integrated Synthesis of Nitrogen-Doped Mesoporous Carbon from Melamine Resins with Superior Performance in Supercapacitors

被引:168
作者
Li, Meng [1 ]
Xue, Junmin [1 ]
机构
[1] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117573, Singapore
关键词
ACTIVATED CARBONS; ELECTROCHEMICAL PERFORMANCE; GRAPHENE NANOSHEETS; POLYPYRROLE; OXIDE; CAPACITANCE; ELECTRODES;
D O I
10.1021/jp410198r
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
An integrated and reproducible chemical process was developed to fabricate the N-doped mesoporous carbon by using melamine resin as nitrogen source. A two-dimensional carbon framework of graphene sheets was also used as a conductive substrate in order to boost the performance of such nitrogen-doped carbon materials. Compared with the pure mesoporous carbon, the as-made nitrogen-doped carbon/graphene electrode materials exhibited suitable pore size distribution, ordered meso-structure, and uniformly dispersed N atoms with tunable doping amount. These unique properties make them promising electrodes for supercapacitors with superior performance. In particular, N-doped carbon and decorated graphene electrodes could deliver the specific capacitance of 238 and 289 F/g at the current density of 0.2 A/g in a three-electrode system. The results from symmetrical two-electrode revealed that the highly N-doped carbon electrodes offered excellent rate capability (ca. 78% retention as the current density increased from 0.1 to 20 A/g) and superior cycling performance (ca. 91% retention after 1000 cycles).
引用
收藏
页码:2507 / 2517
页数:11
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