Nanocrystal manganese oxide (Mn₃O₄, MnO) anchored on graphite nanosheet with improved electrochemical Li-storage properties

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• 作者：Shuang-Yu Liu ; Jian Xie ; Yun-Xiao Zheng ; Gao-Shao Cao ; Tie-Jun Zhu ; Xin-Bing Zhao ; ^{zhaoxb@zju.edu.cn}
• 关键词：Mn3O4 ; MnO ; Graphene ; Graphite nanosheet ; Electrochemical properties
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：1 April, 2012
• 卷：66
• 期：Complete
• 页码：271-278
• 文件大小：2111 K

摘要

Graphite nanosheet anchored with nanocrystal manganese oxide (Mn₃O₄, MnO) was synthesized by a facile in situ one-pot solvothermal route. It was found that nanosized Mn₃O₄ and MnO particles (30-50 nm) were homogeneously anchored on graphite nanosheet. During the hydrothermal reaction, the reduction of graphite oxide to graphite nanosheet and the formation of manganese oxide occur simultaneously, forming a manganese-oxide/graphite nanosheet sandwich structure. In this sandwich structure, the electrochemical properties of Mn₃O₄ and MnO can be obviously improved because of the buffering, confining and conducting effects of the graphite nanosheet. The good electrochemical performance of manganese-oxide/graphite nanosheet composites makes them potential application as anodes in Li-ion batteries.