二氧化锰含量对活性炭电极电化学性能的影响

doi:10.13208/j.electrochem.150721

电化学（中英文） ›› 2015, Vol. 21 ›› Issue (6): 577-582. doi: 10.13208/j.electrochem.150721

二氧化锰含量对活性炭电极电化学性能的影响

申昆*，周贤良，段祺舜

南昌航空大学材料科学与工程学院，江西南昌 330063

出版日期:2015-12-23 发布日期:2015-12-23
通讯作者: 申昆 E-mail:1353278219@qq.com
基金资助:
国家自然科学基金（No. 21103085）及江西省教育厅科技落地计划项目（No. DB201101397）资助

Effect of MnO₂ Content on Electrochemical Capacitance Behavior of Active Carbon Electrode

SHEN Kun*, ZHOU Xian-liang, DUAN Qi-shun

School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China

Published:2015-12-23 Online:2015-12-23
Contact: SHEN Kun E-mail:1353278219@qq.com

摘要/Abstract

摘要：

本文采用液相法、热分解MnCO₃法以及电解沉积法制备不同二氧化锰粉末，并将其与活性炭复合，应用于水系超级电容器. 使用X射线衍射（XRD）、扫描电子显微镜（SEM）技术对材料形貌进行表征. 使用循环伏安法以及恒流充放电法对其电化学性能进行测试. 实验数据表明，α-MnO₂（质量分数70%）掺杂活性炭电极的最大比容量为151 F•g^-1，β-MnO₂（质量分数60%）掺杂活性炭电极的最大比容量为172 F•g^-1，γ-MnO₂（质量分数50%）掺杂活性炭电极的最大比容量为141 F•g^-1，但二氧化锰粉末对电极内阻的影响呈无规律性.

关键词: 水系非对称超级电容器, 二氧化锰, 活性炭电极

Abstract:

In this work, the manganese dioxide (MnO₂) materials were prepared by solution approach at low temperature, thermal decomposition and electrochemical deposition. The actived carbon (AC) and MnO₂ composite electrodes were used for aqueous supercapacitors. The morphologies and structures of the prepared materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the electrochemical behaviors were tested by cyclic voltammetry (CV) and galanostatic charge-discharge tests. Electrochemical test data show that the maximum specific capacitances of 151, 172 and 141 F•g^-1 were obtained with the contents of MnO₂ being 70, 60 and 70% in the composites, respectively. However, the influence of MnO₂powder on the electrode impedance was not straightforward.

Key words: aqueous asymmetic super capacitor, manganese oxide, activated carbon electrode

中图分类号:

O646

申昆, 周贤良, 段祺舜. 二氧化锰含量对活性炭电极电化学性能的影响[J]. 电化学（中英文）, 2015, 21(6): 577-582.

SHEN Kun, ZHOU Xian-liang, DUAN Qi-shun. Effect of MnO₂ Content on Electrochemical Capacitance Behavior of Active Carbon Electrode[J]. Journal of Electrochemistry, 2015, 21(6): 577-582.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.150721

https://electrochem.xmu.edu.cn/CN/Y2015/V21/I6/577

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二氧化锰含量对活性炭电极电化学性能的影响

Effect of MnO₂ Content on Electrochemical Capacitance Behavior of Active Carbon Electrode

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