Metal-organic framework assisted synthesis of nitrogen-doped hollow carbon materials for enhanced supercapacitor performance
Metal-organic framework assisted synthesis of nitrogen-doped hollow carbon materials for enhanced supercapacitor performance
复制标题
金属有机骨架辅助合成氮掺杂中空碳材料以增强超级电容器性能
DOI：
10.1039/c8nj02775g
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发表时间：
2018
影响因子：
3.3
通讯作者：
Xiao Yonghou
中科院分区：
文献类型：
--
作者：
Zhang Xu;Fan Qiuyu;Yang He;Xiao Hongyan;Xiao Yonghou
采用聚多巴胺（PDA）包覆ZIF-8多面体，通过简单的碳化工艺制备了氮掺杂空心碳材料。ZIF-8多面体可以用作中空结构的牺牲模板，并且ZIF-8多面体和PDA都可以用作碳源和氮源。由于分级孔结构和高水平N掺杂的协同效应，氮掺杂中空碳材料可以作为超级电容器的理想电极材料，在0.2 A g-1的电流密度下表现出253 F g-1的增强的比电容，并且在20 A g-1的高电流密度下表现出70%的电容保持率的优异倍率性能。此外，ZIF-8@PDA-C还显示出优异的电化学稳定性，在10 000次循环中具有93%的电容保持率。 这也将为超级电容器和其他碳基储能装置配置氮掺杂中空碳电极材料提供新的策略。
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 10 000 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.