熔盐处理MnO_2及其超级电容性能研究

doi:10.61558/2993-074X.1861

电化学（中英文） ›› 2008, Vol. 14 ›› Issue (1): 46-50. doi: 10.61558/2993-074X.1861

熔盐处理MnO_2及其超级电容性能研究

陈野;张尊波;张巍;刘良;刘智敏;

哈尔滨工程大学材料科学与化学工程学院,哈尔滨工程大学材料科学与化学工程学院,哈尔滨工程大学材料科学与化学工程学院,哈尔滨工程大学材料科学与化学工程学院,哈尔滨工程大学材料科学与化学工程学院黑龙江哈尔滨150001,黑龙江哈尔滨150001,黑龙江哈尔滨150001,黑龙江哈尔滨150001,黑龙江哈尔滨150001

收稿日期:2008-02-28 修回日期:2008-02-28 出版日期:2008-02-28 发布日期:2008-02-28

Molten Salt Treatment of MnO_2 and Investigation on Supercapacitor Properties

CHEN Ye,ZHANG Zun-bo,ZHANG Wei,LIU Liang,LIU Zhi-min

(College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China

Received:2008-02-28 Revised:2008-02-28 Published:2008-02-28 Online:2008-02-28

摘要/Abstract

摘要： 以KCl-NaCl-LiCl熔盐体系处理由固相法制备的MnO2,经XRD、循环伏安、恒流充放电和交流阻抗测试表明,合成的MnO2样品含α-MnO2与γ-MnO2混合晶相,熔盐处理后其结晶程度增加,而且超级电容性能明显提高,放电比容量(129.07 F.g-1)比处理前的(100.94 F.g-1)提高了27.88%.熔盐处理后的样品循环性能良好,充放电效率接近100%,等效串联电阻(RESR)和电极电阻(RE)分别为0.28Ω和0.54Ω.

关键词: 超级电容器, 熔盐, MnO2, 循环伏安, 恒流充放电, 交流阻抗

Abstract: The MnO2 prepared by solid phase method is treated by KCl-NaCl-LiCl molten salt system.The XRD patterns indicated that the crystal structures of MnO2 sample have had the α-MnO2 and γ-MnO2 phase,the crystallinity of sample is increased after treated by molten salt.The electrochemical properties were tested by cyclic voltammetry,constant current charge/discharge and AC impedance.The result shows that the supercapacitor performance of the treated material has improved.The specific discharge capacitance of the treated sample are 129.07 F·g-1,increased by 27.88% compared to 100.94 F·g-1 of untreated sample.Long cycle life and high coulombic efficiency were also demonstrated after charge/discharge 100 cycles.The value of RESR and RE are 0.28 Ω and 0.54 Ω respectively after treated.

Key words: supercapacitor, molten salt, MnO2, cyclic voltammograms, constant current charge/discharge, AC impedance

中图分类号:

TM53

陈野, 张尊波, 张巍, 刘良, 刘智敏, . 熔盐处理MnO_2及其超级电容性能研究[J]. 电化学（中英文）, 2008, 14(1): 46-50.

CHEN Ye, ZHANG Zun-bo, ZHANG Wei, LIU Liang, LIU Zhi-min. Molten Salt Treatment of MnO_2 and Investigation on Supercapacitor Properties[J]. Journal of Electrochemistry, 2008, 14(1): 46-50.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.1861

https://electrochem.xmu.edu.cn/CN/Y2008/V14/I1/46

参考文献

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熔盐处理MnO_2及其超级电容性能研究

Molten Salt Treatment of MnO_2 and Investigation on Supercapacitor Properties

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