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论文类型：期刊论文

发表时间：2018-11-07

发表刊物：New Journal of Chemistry

收录刊物：SCIE

卷号：42

期号：21

页面范围：17389-17395

ISSN号：1144-0546

摘要：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.