SCI和EI收录∣中国化工学会会刊

›› 2015, Vol. 23 ›› Issue (3): 583-589.DOI: 10.1016/j.cjche.2014.11.020

• Energy, Resources and Environmental Technology • Previous Articles     Next Articles

In-situ synthesized mesoporous TiO2-B/anatase microparticles: Improved anodes for lithium ion batteries

Wei Zhuang1,2, Linghong Lu1, Wei Li1, Rong An1, Xin Feng1, Xinbing Wu1, Yudan Zhu1, Xiaohua Lu1   

  1. 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
  • Received:2013-06-25 Revised:2014-01-21 Online:2015-04-03 Published:2015-03-28
  • Supported by:
    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) and the National Basic Research Program of China (2009CB623407, 2009CB219902 and 2009CB226103).

In-situ synthesized mesoporous TiO2-B/anatase microparticles: Improved anodes for lithium ion batteries

Wei Zhuang1,2, Linghong Lu1, Wei Li1, Rong An1, Xin Feng1, Xinbing Wu1, Yudan Zhu1, Xiaohua Lu1   

  1. 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
  • 通讯作者: Linghong Lu, Xiaohua Lu
  • 基金资助:
    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) and the National Basic Research Program of China (2009CB623407, 2009CB219902 and 2009CB226103).

Abstract: 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 coremaintains the capacity stability. The heterojunction interface between themain polymorph of anatase and the trace of TiO2-B exhibits promising lithiumion battery performance. This trace of 5% (by mass) TiO2-B determined by Raman spectra brings the first discharge capacity of thismaterial to 247mA·h·g-1, giving 20% improvement compared to the anatase counterpart. Stability testing at 1 C reveals that the capacitymaintains at 171mA·h·g-1, which is better than 162mA·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.

Key words: Titania, Lithium ion battery, Microparticles, Mesoporous, TiO2-B

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 coremaintains the capacity stability. The heterojunction interface between themain polymorph of anatase and the trace of TiO2-B exhibits promising lithiumion battery performance. This trace of 5% (by mass) TiO2-B determined by Raman spectra brings the first discharge capacity of thismaterial to 247mA·h·g-1, giving 20% improvement compared to the anatase counterpart. Stability testing at 1 C reveals that the capacitymaintains at 171mA·h·g-1, which is better than 162mA·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.

关键词: Titania, Lithium ion battery, Microparticles, Mesoporous, TiO2-B