Ce掺杂Mn3O4及其电化学电容行为

doi:10.3866/PKU.WHXB20110709

物理化学学报 >> 2011, Vol. 27 >> Issue (07): 1673-1678.doi: 10.3866/PKU.WHXB20110709

Ce掺杂Mn₃O₄及其电化学电容行为

张子瑜, 胡中爱, 杨玉英, 王欢文, 常艳琴, 陈艳丽, 雷自强

西北师范大学化学化工学院, 甘肃省高分子材料重点实验室, 生态环境相关高分子材料教育部重点实验室, 兰州 730070

收稿日期:2011-01-14 修回日期:2011-04-08 发布日期:2011-06-28
通讯作者: 胡中爱 E-mail:zhongai@nwnu.edu.cn
基金资助:
国家自然科学基金(20963009), 甘肃省自然科学基金(0803RJ2A005)和甘肃省教育厅研究生导师计划项目资助

Ce-Doped Mn₃O₄ and Its Electrochemical Capacitive Behavior

ZHANG Zi-Yu, HU Zhong-Ai, YANG Yu-Ying, WANG Huan-Wen, CHANG Yan-Qin, CHEN Yan-Li, LEI Zi-Qiang

Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China

Received:2011-01-14 Revised:2011-04-08 Published:2011-06-28
Contact: HU Zhong-Ai E-mail:zhongai@nwnu.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (20963009), Natural Science Foundation of Gansu Province, China (0803RJA005) and Postgraduate Advisor Program of Education Department of Gansu Province, China.

摘要/Abstract

摘要：

用溶胶-凝胶方法合成了Mn₃O₄和Ce掺杂Mn₃O₄. 采用X射线衍射(XRD)、傅里叶变换红外(FT-IR)光谱、场发射扫描电镜(FESEM)和透射电子显微镜(TEM)对其结构和形貌进行了表征. 采用循环伏安、电化学交流阻抗和恒流充放电技术对其电化学性能进行了测试. 研究结果表明, Ce掺杂对Mn₃O₄的形貌和电化学性能均有显著影响. 当Ce离子占金属离子总量的3%时, 掺杂Mn₃O₄的单电极比电容高达477 F·g^-1, 比未掺杂的提高了43.7%, 并且表现出更好的循环稳定性.

关键词: 溶胶-凝胶, Mn₃O₄, Ce, 掺杂, 电化学电容

Abstract:

Mn₃O₄ and Ce doped Mn₃O₄ were synthesized via a sol-gel route using metal nitrates as raw materials and citric acid as the chelating agent. The gel precursors were calcined at 300 ℃ for 12 h in a muffle furnace. Their morphology and structure were characterized using powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Their electrochemical performance as a supercapacitor electrode material was investigated comparatively by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge. The experimental results indicated that Ce- doping did not change the structure of Mn₃O₄ but greatly affected the morphology and considerably enhanced the electrochemical performance of Mn₃O₄. A specific capacitance of 477 F·g^-1 was obtained when the mole ratio of Ce ion to total metal ions was 3%, which was 43.7% higher than that of the undoped material. Moreover, Ce-doping significantly improved the capacitance retention ability.

Key words: Sol-gel, Mn₃O₄, Ce, Dope, Electrochemical capacitance

张子瑜, 胡中爱, 杨玉英, 王欢文, 常艳琴, 陈艳丽, 雷自强. Ce掺杂Mn₃O₄及其电化学电容行为[J]. 物理化学学报, 2011, 27(07): 1673-1678.

ZHANG Zi-Yu, HU Zhong-Ai, YANG Yu-Ying, WANG Huan-Wen, CHANG Yan-Qin, CHEN Yan-Li, LEI Zi-Qiang. Ce-Doped Mn₃O₄ and Its Electrochemical Capacitive Behavior[J]. Acta Phys. -Chim. Sin., 2011, 27(07): 1673-1678.

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB20110709

https://www.whxb.pku.edu.cn/CN/Y2011/V27/I07/1673

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Ce掺杂Mn₃O₄及其电化学电容行为

Ce-Doped Mn₃O₄ and Its Electrochemical Capacitive Behavior

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