Facile Synthesis of Carbon-Coated Spinel Li4Ti5O12/Rutile-TiO2 Composites as an Improved Anode Material in Full Lithium-Ion Batteries with LiFePO4@N-Doped Carbon Cathode

Ping Wang; Geng Zhang; Jian Cheng; Ya You; Yong-Ke Li; Cong Ding; Jiang-Jiang Gu; Xin-Sheng Zheng; Chao-Feng Zhang; Fei-Fei Cao

doi:10.1021/acsami.6b15982

Facile Synthesis of Carbon-Coated Spinel Li₄Ti₅O₁₂/Rutile-TiO₂ Composites as an Improved Anode Material in Full Lithium-Ion Batteries with LiFePO₄@N-Doped Carbon Cathode

ACS Appl Mater Interfaces. 2017 Feb 22;9(7):6138-6143. doi: 10.1021/acsami.6b15982. Epub 2017 Feb 8.

Authors

Affiliations

¹ College of Science, Huazhong Agricultural University , Wuhan, Hubei 430070, People's Republic of China.
² Department of Mechanical Engineering, University of Texas at Austin , Austin, Texas 78712, United States.
³ School of Chemistry and Chemical Engineering, Hefei University of Technology , Hefei, Anhui 230009, People's Republic of China.

PMID: 28121120
DOI: 10.1021/acsami.6b15982

Abstract

The spinel Li₄Ti₅O₁₂/rutile-TiO₂@carbon (LTO-RTO@C) composites were fabricated via a hydrothermal method combined with calcination treatment employing glucose as carbon source. The carbon coating layer and the in situ formed rutile-TiO₂ can effectively enhance the electric conductivity and provide quick Li⁺ diffusion pathways for Li₄Ti₅O₁₂. When used as an anode material for lithium-ion batteries, the rate capability and cycling stability of LTO-RTO@C composites were improved in comparison with those of pure Li₄Ti₅O₁₂ or Li₄Ti₅O₁₂/rutile-TiO₂. Moreover, the potential of approximately 1.8 V rechargeable full lithium-ion batteries has been achieved by utilizing an LTO-RTO@C anode and a LiFePO₄@N-doped carbon cathode.

Keywords: Li4Ti5O12; anode; carbon coating; full lithium-ion battery; rutile-TiO2.