Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (1): 349-355.doi: 10.3866/PKU.WHXB201512073

• ARTICLE • Previous Articles     Next Articles

In-situ Preparation of Na2Ti3O7 Nanosheets as High-Performance Anodes for Sodium Ion Batteries

Cheng-Cheng CHEN1,Ning ZHANG1,Yong-Chang LIU1,Yi-Jing WANG1,Jun CHEN1,2,*()   

  1. 1 Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, P. R. China
    2 Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, P. R. China
  • Received:2015-11-06 Published:2016-01-13
  • Contact: Jun CHEN E-mail:chenabc@nankai.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51231003, 21231005);Ministry of Education(B12015, 113016A, ACET-13-0296)

Abstract:

We report on the in-situ preparation of Na2Ti3O7 nanosheets and their application as high-performance anode material for sodium ion batteries. Nanosheets with interconnected micro-nano architectures are prepared by simply engraving commercial titanium foils. Furthermore, the foils can be used directly as electrodes without redundant conductive additives or binders. The electrode material exhibits excellent electrochemical performance with reversible capacity of 175 mAh·g–1 at 50 mA·g–1 and 120 mAh·g–1 at 2000 mA·g–1 after 3000 cycles (capacity retention of 96.5%). The superior electrochemical performance of Na2Ti3O7 nanosheets results from the short ion/electron diffusion pathway of the two-dimensional architecture and the good conductive capability of the binder-free structure. The anode of the binder-free Na2Ti3O7 nanosheets effectively overcomes poor ion/electron conductivity, the main drawback of Na2Ti3O7 electrodes, and is promising for rechargeable sodium ion batteries.

Key words: Na2Ti3O7, Nanosheet, Binder-free, Anode material, Sodium ion battery

MSC2000: 

  • O646