超级电容器
循环伏安法
电容
材料科学
扫描电子显微镜
傅里叶变换红外光谱
分析化学(期刊)
电极
电化学
碳纤维
活性炭
化学工程
纳米技术
复合材料
化学
色谱法
复合数
有机化学
工程类
物理化学
吸附
作者
Li Bai,Xianyou Wang,Xiaoyan Zhang,Wanmei Long,Hong Wang,Xiaoshuan Li
出处
期刊:Journal of New Materials For Electrochemical Systems
[Journal of New Materials for Electrochemical Systems]
日期:2011-10-13
被引量:1
标识
DOI:10.14447/jnmes.v15i1.83
摘要
Carbon microbeads (CMB) were successfully prepared by glucose hydrothermal route in a stainless steel autoclave. The CMB was treated in concentrated nitric acid in order to gain the highly activated carbon microbeads (ACMB). The structure and surface morphology of as-prepared ACMB were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectrometer (FTIR), respectively. The electrochemical characteristics and capacitive behaviors of the ACMB were studied by cyclic voltammetry, current charge/discharge and cycle life measurements. The results show that the ACMB electrode has good electrochemical performance and the specific capacitance of ACMB is 291.9 F g-1 at a scanning rate of 1 mV s-1. Meanwhile, the specific capacitance of the button supercapacitor was as high as 75 F g-1 at a charge/discharge current density of 0.5 A g-1 and the loss of specific capacitance was nearly neglectable after 5000 cycles.
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