纳米复合材料
电容器
分子筛
材料科学
电化学
化学工程
纳米技术
化学
有机化学
电极
催化作用
电压
电气工程
物理化学
工程类
作者
Ling‐Bin Kong,Jian-Jun Cai,Linlin Sun,Jing Zhang,Yong‐Chun Luo,Long Kang
标识
DOI:10.1016/j.matchemphys.2010.03.007
摘要
Abstract A nano-flake network cobalt hydroxide and well-ordered hexagonal mesoporous silica SBA-15 molecular sieves nanocomposite materials (designated as Co(OH) 2 /SBA-15) for electrochemical capacitor electrode have been prepared using a liquid-precipitated method. The electrochemical capacitance characterization of the Co(OH) 2 /SBA-15 materials was performed using cyclic voltammetry, chronopotentiometry, and impedance spectroscopy, respectively. These nano-flakes cobalt hydroxide maintain high utilization at high rates of discharge. A maximum specific capacitance of 467.5 F g −1 can be achieved in 2 M aqueous KOH with the potential range from −0.2 to 0.4 V (vs. SCE) in a three-electrode glass cell at room temperature for the Co(OH) 2 /SBA-15 electrode, suggesting its potential application in electrochemical capacitors. Furthermore, the effect of annealing temperatures on the electrochemical capacitance characteristics has also been explored.
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