Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, Key Lab of Eco-Environments Related Polymer Materials of MOE, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China.
Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, Key Lab of Eco-Environments Related Polymer Materials of MOE, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China.
J Colloid Interface Sci. 2019 Mar 15;539:370-378. doi: 10.1016/j.jcis.2018.12.079. Epub 2018 Dec 23.
This paper is the first study of the application of non-metallic element modified metal-organic frameworks in supercapacitors. Three-dimensional metal-organic frameworks modified by non-metallic element have a novel flower cluster structure, which effectively improve the structural stability and the electrochemical performance of the supercapacitors. The electrochemical performances of the materials modified by the vulcanizing agent are particularly significant with a high specific capacitance of 1453.5F g at a current density of 1 A g and excellent cycle stability (retention rate of 89.23% after 5000 cycles). In addition, the assembled asymmetric supercapacitor S@Ni-MOF//AC also shows a high energy density of 56.85 Wh kg at power density of 480 W kg and good cycle stability with a capacitance retention of 86.67% after 20,000 cycles at current density 5 A g. As a result, metal-organic frameworks materials modified by the non-metallic element make up for the crystal defects, which can be used as promising electrode materials for practical applications.
本文首次研究了非金属元素修饰的金属有机骨架在超级电容器中的应用。非金属元素修饰的三维金属有机骨架具有新颖的花簇结构，有效提高了超级电容器的结构稳定性和电化学性能。硫化剂修饰后的材料具有特别显著的电化学性能，在电流密度为 1 A/g 时具有 1453.5F/g 的高比电容和出色的循环稳定性（5000 次循环后保持率为 89.23%）。此外，组装的非对称超级电容器 S@Ni-MOF//AC 也在 480 W/kg 的功率密度下表现出 56.85 Wh/kg 的高能量密度和良好的循环稳定性，在 5 A/g 的电流密度下 20000 次循环后电容保持率为 86.67%。因此，非金属元素修饰的金属有机骨架材料弥补了晶体缺陷，可以作为有前途的实际应用电极材料。
