Mesoporous polyaniline or polypyrrole/anatase TiO2 nanocomposite as anode materials for lithium-ion batteries |
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Authors: | C Lai |
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Affiliation: | Institute of New Energy Material Chemistry, Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China |
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Abstract: | A functional composite as anode materials for lithium-ion batteries, which contains highly dispersed TiO2 nanocrystals in polyaniline matrix and well-defined mesopores, is fabricated by employing a novel one-step approach. The as-prepared mesoporous polyaniline/anatase TiO2 nanocomposite has a high specific surface area of 224 m2 g−1 and a predominant pore size of 3.6 nm. The electrochemical performance of the as-prepared composite as anode material is investigated by cyclic voltammograms and galvanostatic method. The results demonstrate that the polyaniline/anatase nanocomposite provides larger initial discharge capacity of 233 mAh g−1 and good cycle stability at the high current density of 2000 mA g−1. After 70th cycles, the discharge capacity is maintained at 140 mAh g−1. The excellent electrochemical performance of the polyaniline/TiO2 nanocomposite is mainly attributed to its special structure. Furthermore, it is accessible to extend the novel strategy to other polymer/TiO2 composites, and the mesoporous polypyrrole/anatase TiO2 is also successfully fabricated. |
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Keywords: | Polyaniline TiO2 Mesoporous Nanocomposite Lithium-ion batteries |
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