| 热处理对超级电容器MnO2电极电化学性能的影响 |
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| 引用本文： | 叶志国,黄广斌,刘华英,董应虎,周贤良,华小珍,袁学滔.热处理对超级电容器MnO2电极电化学性能的影响[J].材料热处理学报,2012,33(9):13-16. |
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| 作者姓名： | 叶志国 黄广斌 刘华英 董应虎 周贤良 华小珍 袁学滔 |
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| 作者单位： | 1. 南昌航空大学材料科学与工程学院,江西南昌,330063
2. 北京有色金属研究总院,北京,100088 |
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| 基金项目： | 国家自然科学基金，航空基金，江西省自然科学基金 |
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| 摘 要： | 采用阳极电沉积法制备MnO2粉末,并在不同温度(200～450℃)下对MnO2热处理,通过XRD分析热处理温度对MnO2粉末物相结构的影响,采用循环伏安法、恒流充放电法测试热处理温度对MnO2电极电化学性能的影响。结果表明:随着温度的升高,MnO2由原始的γ-MnO2逐渐变为β-MnO2,MnO2电极的比容量先增加后减小;当温度为300℃时,MnO2电极的比容量达到最高,在0.5 mol/L Na2SO4溶液中循环伏安扫描速度为10 mV.s-1条件下,电极比容量为156 F.g-1,且此时电极的稳定性良好,在10000个循环充放电内MnO2电极比容量几乎无衰减。
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| 关 键 词： | 超级电容器 二氧化锰电极 热处理温度 电化学性能 |
Effect of heat treatment on electrochemical properties of manganese dioxide for supercapacitor |
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| YE Zhi-guo,HUANG Guang-bin,LIU Hua-ying,DONG Ying-hu,ZHOU Xian-liang,HUA Xiao-zhen,YUAN Xue-tao.Effect of heat treatment on electrochemical properties of manganese dioxide for supercapacitor[J].Transactions of Materials and Heat Treatment,2012,33(9):13-16. |
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| Authors: | YE Zhi-guo HUANG Guang-bin LIU Hua-ying DONG Ying-hu ZHOU Xian-liang HUA Xiao-zhen YUAN Xue-tao |
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| Affiliation: | 1.School of Materials Science and Engineering,Nanchang Hankong University,Nanchang 330063,China; 2.Beijing General Research Institute for Nonferrous Metal,Beijing 100088,China) |
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| Abstract: | Manganese dioxide powder were prepared by anodic deposition and heat treatment at 200-450 ℃.The phases of the powders were characterized by X-ray diffraction(XRD) and the electrochemical properties of the powder electrodes were clarified by cyclic voltammetry,galvanostatic charge/discharge.The results show that the original γ-MnO2 is converted to β-MnO2 progressively at higher temperatures.With the increasing of temperatures the specific capacitance is raised to a maximum value and then decreases.The highest specific capacitance(156 F·g-1) is obtained when treated at 300 ℃ with a CV scan rate of 10 mV·s-1 in 0.5 mol/L Na2SO4 solution,and it exhibits a high electrochemical stability(no deterioration) after 10000 charge/discharge cycles. |
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| Keywords: | supercapacitor MnO2 electrode heat treatment temperature electrochemical property |
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