Templated synthesis of hierarchically porous manganese oxide with a crystalline nanorod framework and its high electrochemical performance

被引：77

作者：

Chen, Hangrong ^{[1
]}

Dong, Xiaoping ^{[1
]}

Shi, Jianlin ^{[1
]}

Zhao, Jinjin ^{[1
]}

Hua, Zile ^{[1
]}

Gao, Jianhua ^{[1
]}

Ruan, Meiling ^{[1
]}

Yan, Dongsheng ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2007年 / 17卷 / 09期

关键词：

D O I：

10.1039/b615972a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A simple approach has been developed to synthesize hierarchically porous MnO2 with a crystalline nanorod framework using mesoporous silica SBA-15 as a template, combined with in situ ion-exchange and surfactant-extraction processes without calcination. XRD, nitrogen adsorption analysis, FE-SEM, TEM, XPS and FT-IR techniques are used for the structural characterization. Such MnO2 materials show a macro-mesoporous hierarchical nanostructure containing large pores of several hundreds of nanometres and mesopores of 3.76 nm with a high surface area of 142 m(2) g(-1). The mesoporous framework of this material is composed of aligned single crystalline MnO2 nanorods of ca. 5-6 nm in diameter and ca. 20-25 nm in length. The electrochemical properties of the prepared MnO2 material were studied using cyclic voltammetry in a mild aqueous electrolyte, which shows that such a MnO2 nanostructure has a very high specific capacitance of 258 F g-1 and a good reversibility due to its favorable phase and hierarchically porous structure as well as high surface area.

引用

页码：855 / 860

页数：6

共 23 条

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