MnO2纳米空心球的制备及其电化学性能

doi:10.11949/j.issn.0438-1157.20141446

化工学报 ›› 2015, Vol. 66 ›› Issue (3): 1201-1207.DOI: 10.11949/j.issn.0438-1157.20141446

• 材料化学工程与纳米技术 • 上一篇下一篇

MnO₂纳米空心球的制备及其电化学性能

汪晓莉, 郑玉婴, 刘先斌

福州大学材料科学与工程学院, 福建福州 350116

收稿日期:2014-09-24 修回日期:2014-10-30 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 郑玉婴
基金资助:
福建省高校产学合作科技重大项目(2012H6008);福州市科技计划项目(2013-G-92)。

Synthesis and electrochemical properties of MnO₂ hollow nanospheres

WANG Xiaoli, ZHENG Yuying, LIU Xianbin

School of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, Fujian, China

Received:2014-09-24 Revised:2014-10-30 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the Industry-University Cooperation Key Project of Science and Technology of Fujian Province(2012H6008) and the Fuzhou Science and Technology Plan Project(2013-G-92).

摘要/Abstract

摘要：

采用水热法通过添加Ce离子制备了MnO₂纳米空心球电极材料。Ce离子对MnO₂的形貌和结晶程度有很大的影响,添加Ce离子后生成由纳米棒组成的中空球,中空球比表面积(BET)达到315.2 m²·g^-1。MnO₂电极电化学测试结果表明:当铈锰摩尔比为0.2时电极材料具有较好的电化学性能,其比电容达到178.6 F·g^-1,与未加Ce离子相比其比电容提高了2.6倍,而且经过1000次循环稳定性测试后比电容仍保留了90.5%。这些结果表明添加Ce离子有利于形成中空结构,并提高了MnO₂电极的比电容。

关键词: 二氧化锰, 纳米结构, 水热, 电化学, 超级电容器

Abstract:

Electrode material of MnO₂ hollow nanosphere was synthesized via a simple hydrothermal process in the presence of Ce ion. Ce ion played a crucial role in controlling the morphology and crystalline structure of MnO₂. The hollow nanosphere consisted of nanorods, and Brunauer-Emmet-Teller (BET) specific surface area of the hollow nanosphere was 315.2 m²·g^-1. Electrochemical behavior of MnO₂ electrode material was measured by cyclic voltammetry and galvanostatic charge-discharge. Better electrochemical properties of MnO₂electrode could be obtained when mole ratio of Ce to Mn was 0.2, and specific capacitance of as-prepared MnO₂electrode was 178.6 F·g^-1, 2.6 times higher than MnO₂electrode without Ce ions. Moreover, MnO₂electrode exhibited remarkable cyclability, and specific capacitance retained 90.5% even after 1000 cycles. Ce ion was favorable for forming a hollow structure, and improved specific capacitance of MnO₂electrode.

Key words: manganese dioxide, nanostructure, hydrothermal, electrochemistry, supercapacitor

中图分类号:

TQ15

汪晓莉, 郑玉婴, 刘先斌. MnO₂纳米空心球的制备及其电化学性能[J]. 化工学报, 2015, 66(3): 1201-1207.

WANG Xiaoli, ZHENG Yuying, LIU Xianbin. Synthesis and electrochemical properties of MnO₂ hollow nanospheres[J]. CIESC Journal, 2015, 66(3): 1201-1207.

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MnO₂纳米空心球的制备及其电化学性能

Synthesis and electrochemical properties of MnO₂ hollow nanospheres

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