用于高性能超级电容器的具有银耳状核壳结构的ZIF衍生硫化物。

ZIF-derived sulfides with tremella-like core-shell structure for high performance supercapacitors.

作者信息

Cui Yuhan, Sun Jing, Zhao Lijie, Wang Yining, Wang Jiawei, Wu Yunpeng, Zhang Wenxi, Tang Yuzhe, Fan Zengyuan, Su Zhongmin

机构信息

School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Jilin Provincial International Joint Research Center of Photo-functional Materials and Chemistry, Changchun 130022, China.

出版信息

J Colloid Interface Sci. 2024 Apr 15;660:1010-1020. doi: 10.1016/j.jcis.2024.01.102. Epub 2024 Jan 18.

DOI:10.1016/j.jcis.2024.01.102

PMID:38290324

Abstract

Metal-organic frameworks (MOFs) have emerged as promising active electrode materials in supercapacitors for its controllable porous structure and excellent physio-chemical properties. However, the poor conductivities keep it from achieving its full capacitance potential, which greatly limits its practical application. Here, a facile pathway is reported to fabricate the GO/NiZnS@NiCoS composite with large specific surface area and favorable electrical conductivity. Thanks to the novel tremella-like core-shell structure and high-efficient synergistic effects among multi-components, the designed GO/NiZnS@NiCoS electrode shows a high specific capacitance of 2284 F/g at 1 A/g. Furthermore, the asymmetric supercapacitor fabricated by coupling GO/NiZnS@NiCoS positive electrode with biological carbon negative electrode achieves a remarkable energy density of 120 Wh kg at a power density of 750 W kg.

摘要

金属有机框架材料（MOFs）因其可控的多孔结构和优异的物理化学性质，已成为超级电容器中颇具前景的活性电极材料。然而，其导电性较差，阻碍了其充分发挥电容潜力，这极大地限制了其实际应用。在此，报道了一种简便的方法来制备具有大比表面积和良好导电性的GO/NiZnS@NiCoS复合材料。得益于新颖的银耳状核壳结构以及多组分之间的高效协同效应，所设计的GO/NiZnS@NiCoS电极在1 A/g电流密度下展现出2284 F/g的高比电容。此外，将GO/NiZnS@NiCoS正极与生物碳负极耦合制备的不对称超级电容器，在功率密度为750 W/kg时实现了120 Wh/kg的显著能量密度。