| Autor: |
Wang, Zhongbing, Qiang, Hongwen, Zhu, Zihao, Liu, Jinpeng, Chen, Chunnian, Zhang, Dawei |
| Předmět: |
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| Zdroj: |
ChemElectroChem; Aug2018, Vol. 5 Issue 16, p2242-2249, 8p |
| Abstrakt: |
Abstract: We report the facile preparation of nitrogen‐doped mesoporous hollow carbon nanospheres (N‐MHCNS) by directly carbonizing hollow polypyrrole nanospheres that are derived from in situ polymerization. Here, we use a novel soft template (PMMA‐PBMA‐PMAA) as the core. At 700 °C, the obtained N‐MHCNSs (denoted N‐MHCNS700) show superior electrochemical performance. In 1 M HCl electrolyte, N‐MHCNS700 exhibits a capacitance as high as 275.5 F g−1 at a current density of 1 A g−1 and a high rate capability, retaining 54.4 % of the initial capacitance at the current density of 20 A g−1. In addition, the specific capacitance of N‐MHCNS700 is approximately 100 % retained at a current density of 10 A g−1 after 5000 cycles, indicating amazing stable cycling performance. The excellent electrochemical performance can be derived from the amorphous graphitic carbon, hollow nanosphere structure, mesoporous properties, and nitrogen doping effect. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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