| 原位合成的介孔TiO2-B/锐钛微粒:改善的锂离子电池阳极材料（英文） |
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| 作者姓名： | 庄伟 吕玲红 李伟 安蓉 冯新 邬新兵 朱育丹 陆小华 |
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| 作者单位： | 1.State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;2.National Engineering Technique Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China |
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| 基金项目： | Supported by the Program for Changjiang Scholars and Innovative Research Team in University(PCSIRT 0732);the National Natural Science Foundation of China(21136004,20736002,21176113,20876073);NSFC-RGC(20731160614);China Postdoctoral Science Foundation(20110491407);the National Basic Research Program of China(2009CB623407,2009CB219902 and 2009CB226103) |
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| 摘 要： | Mesoporous TiO2-B/anatase microparticles have been in-situ synthesized from K2Ti2O5 without template. The TiO2-B phase around the particle surface accelerates the diffusion of charges through the interface, while the anatase phase in the core maintains the capacity stability. The heterojunction interface between the main polymorph of anatase and the trace of TiO2-B exhibits promising lithium ion battery performance. This trace of 5%(by mass) TiO2-B determined by Raman spectra brings the first discharge capacity of this material to 247 mA·h·g?1, giving 20%improvement com-pared to the anatase counterpart. Stability testing at 1 C reveals that the capacity maintains at 171 mA·h·g?1, which is better than 162 mA·h·g?1 for single phase anatase or 159 mA·h·g?1 for TiO2-B. The mesoporous TiO2-B/anatase microparticles also show superior rate performance with 100 mA·h·g?1 at 40 C, increased by nearly 25%as compared to pure anatase. This opens a possibility of a general design route, which can be applied to other metal oxide electrode materials for rechargeable batteries and supercapacitors.
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| 关 键 词： | Titania Lithium ion battery Microparticles Mesoporous TiO2-B |
| 收稿时间： | 2013-06-25 |
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