Enhanced Anode Performances of Polyaniline鈥揟iO2鈥揜educed Graphene Oxide Nanocomposites for Lithium Ion Batteries

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• 作者：Fan Zhang ; Huaqiang Cao ; Dongmei Yue ; Jingxian Zhang ; Meizhen Qu
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：September 3, 2012
• 年：2012
• 卷：51
• 期：17
• 页码：9544-9551
• 全文大小：405K
• 年卷期：v.51,no.17(September 3, 2012)
• ISSN：1520-510X

文摘

Here, we report a three-layer-structured hybrid nanostructure consisting of transition metal oxide TiO₂ nanoparticles sandwiched between carbonaceous polymer polyaniline (PANI) and graphene nanosheets (termed as PTG), which, by simultaneously hindering the agglomeration of TiO₂ nanoparticles and enhancing the conductivity of PTG electrode, enables fast discharge and charge. It was demonstrated that the PTG exhibited improved electrochemical performance compared to pure TiO₂. As a result, PTG nanocomposite is a promising anode material for highly efficient lithium ion batteries (LIBs) with fast charge/discharge rate and high enhanced cycling performance [discharge capacity of 149.8 mAh/g accompanying Coulombic efficiency of 99.19% at a current density of 5C (1000 mA/g) after 100 cycles] compared to pure TiO₂. We can conclude that the concept of applying three-layer-structured graphene-based nanocomposite to electrode in LIBs may open a new area of research for the development of practical transition-metal oxide graphene-based electrodes which will be important to the progress of the LIBs science and technology.