期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 17, 期 10, 页码 2651-2660出版社
SPRINGER
DOI: 10.1007/s10008-013-2167-3
关键词
Nitrogen doping; Hierarchical porous carbon; Nano-CaCO3; High capacitance; Supercapacitor
资金
- National Natural Science Foundation of China [20975042, 21175051]
- Fundamental Research Funds for the Central Universities [2010PY009, 2011PY139]
- Natural Science Foundation of Hubei Province Innovation Team [2011CDA115]
Recently, tremendous research efforts have been concentrated on developing high-performance electrode materials to meet the ever-increasing energy and power demands in supercapacitors. Herein, we presented a high-capacity supercapacitor material based on nitrogen-enriched hierarchical porous carbons (NHPCs) synthesized by the carbonization of melamine formaldehyde resins using eco-friendly and inexpensive nano-CaCO3 as template. The effects of carbonization temperature and template content on the porous structure and electrochemical characteristics were compared and discussed in detail. The prepared NHPCs possessed large surface area up to 834 m(2) g(-1) and high nitrogen content up to 20.94 wt %. As electrode material for supercapacitors, NHPCs exhibited superior electrochemical performances with high specific capacitance (190 F g(-1) at 20 A g(-1)), outstanding rate capability (80 %), and excellent cycling stability (over 2,000 cycles at 5 A g(-1)) in 1 M sulfuric acid media. The excellent electrochemical performances are due to the synergic effects of unique hierarchical porous microstructure, abundant nitrogen and oxygen functionalities, as well as high degree of graphitization framework.
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