J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (9): 1977-1981.DOI: 10.1016/j.jmst.2019.04.021

• Orginal Article • Previous Articles     Next Articles

Facile synthesis of rutile TiO2/carbon nanosheet composite from MAX phase for lithium storage

Zhaoruxin Guan, Xiaoxue Wang, Tingting Li, Qizhen Zhu, Mengqiu Jia, Bin Xu*()   

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2019-01-19 Revised:2019-03-14 Accepted:2019-04-25 Online:2019-09-20 Published:2019-07-26
  • Contact: Xu Bin
  • About author:

    1 These authors contributed equally to this work.

Abstract:

Titanium oxide (TiO2), with excellent cycling stability and low volume expansion, is a promising anode material for lithium-ion battery (LIB), which suffers from low electrical conductivity and poor rate capability. Combining nano-sized TiO2 with conductive materials is proved an efficient method to improve its electrochemical properties. Here, rutile TiO2/carbon nanosheet was obtained by calcinating MAX (Ti3AlC2) and Na2CO3 together and water-bathing with HCl. The lamellar carbon atoms in MAX are converted to 2D carbon nanosheets with urchin-like rutile TiO2 anchored on. The unique architecture can offer plentiful active sites, shorten the ion diffusion distance and improve the conductivity. The composite exhibits a high reversible capacity of 247 mA h g-1, excellent rate performance (38 mA h g-1 at 50 C) and stable cycling performance (0.014% decay per cycle during 2000 cycles) for lithium storage.

Key words: TiO2/C, Composite, Anode, Lithium ion battery, MAX