期刊
NEW JOURNAL OF CHEMISTRY
卷 42, 期 21, 页码 17389-17395出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nj02775g
关键词
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资金
- National Natural Science Foundation of China [21776028]
- Doctoral Scientific Research Foundation of Liaoning Province [20170520263]
- Fundamental Research Funds for the Central Universities [DUT18RC(4)059]
Nitrogen-doped hollow carbon materials have been facilely fabricated via the simple carbonization process by using ZIF-8 polyhedrons coated with polydopamine (PDA). ZIF-8 polyhedrons can be used as sacrificial templates for the hollow structures and both ZIF-8 polyhedrons and PDA can be used as carbon and nitrogen sources. Due to the synergistic effect of the hierarchical pore structure and high level N doping, the nitrogen-doped hollow carbon materials can serve as ideal electrode materials for supercapacitors, exhibiting an enhanced specific capacitance of 253 F g(-1) at a current density of 0.2 A g(-1) and excellent rate capability with a capacitance retention of 70% at a high current density of 20 A g(-1). Moreover, ZIF-8@PDA-C also shows excellent electrochemical stability with 93% capacitance retention over 10000 cycles. This will also provide a new strategy for configuring nitrogen-doped hollow carbon electrode materials for supercapacitors and other carbon-based energy storage devices.
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