超级电容器
纳米棒
电容
化学
电极
钴
电流密度
电化学
功率密度
金属
金属有机骨架
化学工程
纳米技术
无机化学
材料科学
物理化学
有机化学
功率(物理)
吸附
工程类
物理
量子力学
作者
Danni Shao,Li Wang,Bin Lü,Jianyu Guo,Siyong Zhang,Yan Lü
标识
DOI:10.1016/j.jelechem.2019.113188
摘要
A high N content supercapacitor electrode material, cobalt-based metal organic framework (named as Co-MOF) with a structure of nanorod, is prepared by solvothermal method. The synthesis temperature and feed ratio are optimized (140 °C, 1:2 M ratio of Co to the ligand) to achieve 414.5 F g−1 specific capacitance at a current density of 0.5 A g−1 in 3 M KOH. The prepared electrode in two-electrode test also delivers a specific capacitance of 334.4 F g−1 at 0.5 A g−1 with an energy density 12.0 Wh kg−1 at the power density of 258.1 W kg−1. More significantly, the capacitance retention rate is up to 113% after 20,000 cycles at a current density of 10 A g−1, which can be attributed to the electrochemical activation process.
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