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Article Navigation >  Green Energy&Environment  > 2018  >  3(3): 277-285
Lingfei Zhao, Tong Tang, Weihua Chen, Xiangming Feng, Liwei Mi. Carbon coated ultrasmall anatase TiO2 nanocrystal anchored on N,S-RGO as high-performance anode for sodium ion batteries. Green Energy&Environment, 2018, 3(3): 277-285. doi: 10.1016/j.gee.2018.01.004
Citation: Lingfei Zhao, Tong Tang, Weihua Chen, Xiangming Feng, Liwei Mi. Carbon coated ultrasmall anatase TiO2 nanocrystal anchored on N,S-RGO as high-performance anode for sodium ion batteries. Green Energy&Environment, 2018, 3(3): 277-285. doi: 10.1016/j.gee.2018.01.004
shu

Carbon coated ultrasmall anatase TiO2 nanocrystal anchored on N,S-RGO as high-performance anode for sodium ion batteries

doi: 10.1016/j.gee.2018.01.004
  • a.

    College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

  • b.

    Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou, 450007 China

More Information
  • Corresponding author: E-mail address: chenweih@zzu.edu.cn (Weihua Chen); E-mail address: mlwzzu@163.com (Liwei Mi)
  • Received date 02 November 2017, Accepted date 24 January 2018, RevRecd date 23 January 2018, Available online 03 February 2018, Publish date 31 July 2018,
    Abstract
  • Anatase TiO2 has been investigated as one of the most promising anode materials for sodium ion batteries (SIBs) with low cost and high theoretical capacity. Herein, a composite material of TiO2/N,S-RGO@C with carbon coated ultrasmall anatase TiO2 anchored on nitrogen and sulfur co-doped RGO matrix was successfully prepared by a rational designed process. The composite structure exhibited ultrasmall crystal size, rich porous structure, homogeneous heteroatoms doping and thin carbon coating, which synergistically resulted in elevated electron and ion transfer. The anode exhibited high rate capacities with good reversibility under high rate cycling. The carbon coating was investigated to be effective to prevent active material falling and lead to long term cycling performance with a high capacity retention of 181 mAh g−1 after 2000 cycles at 2 C. Kinetic studies were carried out and the results revealed that the superior performance of the composite material were derived from the decreased charge transfer resistance and elevated ion diffusion. Results suggested that the TiO2/N,S-RGO@C composite is a promising anode material for sodium ion batteries.

     

    • • A rational designed composite to anchor ultrasmall carbon coated TiO2 on N,S co-doped RGO matrix was prepared. • The composite exhibited elevated electronic and ionic conductivity and superior rate capability in sodium ion batteries. • The anode material delivered superior long cycling performance with a capacity retention of 181 mA h g−1 after 2000 cycles.
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