期刊
ELECTROCHIMICA ACTA
卷 271, 期 -, 页码 49-57出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.03.129
关键词
N/P co-doping; Hierarchical porous carbon; Large surface area; Supercapacitors
资金
- National Natural Science Foundation of China [51641208, 21606151]
- Shanghai Association for Science and Technology Achievements Transformation Alliance Program [LM201680, LM201559]
- Shanghai Excellent Technology Leaders Program [17XD1424900]
- Shanghai Leading Talent Program [017]
- Science and Technology Commission of Shanghai Municipality Project [14520503200, ZX2016-7]
The N/P co-doped hierarchical porous carbon materials are synthesized by SiO2-template approach following potassium phosphate activation. Polyvinylidene fluoride is used as the carbon source, melamine as the nitrogen source and potassium phosphate as the phosphorus source and activator. The obtained porous carbon materials exhibit a hierarchical pore structure (similar to 0.6 and similar to 4 nm), a large specific surface area (1431 m(2) g(-1)) and a high nitrogen and phosphorus content. These predominant characteristics enable the CNP-5-800 sample to exhibit a superior specific capacitance of 337 F g(-1) at 0.5 A g(-1) and outstanding cycling stability of 97.8% retention after 10000 cycles in a three-electrode system. Even in the two-electrode system (an all-solid-state symmetric capacitor), this kind of materials still can deliver an energy density of 23.1 Wh kg(-1) to 12.4 W h kg(-1) at power densities of 720.4 W kg(-1) to 13950 W kg(-1), respectively, and a cycling property of 98.7% maintenance after 5000 cycles. Therefore, the practicable synthetic method and excellent electrochemical performance make CNP-x-y materials a potential candidate in supercapacitor application. (C) 2018 Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据