TiO2(B) nanosheets modified Li4Ti5O12microsphere anode for high-rate lithium-ion batteries

Suyang Lu; Yunfan Shang; Wei Zheng; Yushuo Huang; Rui Wang; Wenwen Zeng; Haoran Zhan; Ye Yang; Jun Mei

doi:10.1088/1361-6528/ac5bba

TiO₂(B) nanosheets modified Li₄Ti₅O₁₂microsphere anode for high-rate lithium-ion batteries

Nanotechnology. 2022 Mar 25;33(24). doi: 10.1088/1361-6528/ac5bba.

Authors

Suyang Lu¹, Yunfan Shang¹, Wei Zheng², Yushuo Huang¹, Rui Wang², Wenwen Zeng¹, Haoran Zhan¹, Ye Yang¹, Jun Mei¹

Affiliations

¹ Development Center of Science and Technology, China Academy of Engineering Physics, Chengdu 610200, People's Republic of China.
² Sichuan Global Creatives Corporation Battery Material CO., LTD, Meishan 620000, People's Republic of China.

PMID: 35259740
DOI: 10.1088/1361-6528/ac5bba

Abstract

With the increasing applications of Lithium-ion batteries in heavy equipment and engineering machinery, the requirements of rate capability are continuously growing. The high-rate performance of Li₄Ti₅O₁₂(LTO) needs to be further improved. In this paper, we synthesized LTO microsphere-TiO₂(B) nanosheets (LTO-TOB) composite by using a solvothermal method and subsequent calcination. LTO-TOB composite combines the merits of TiO₂(B) and LTO, resulting in excellent high-rate capability (144.8, 139.3 and 124.4 mAh g^-1at 20 C, 30 C and 50 C) and superior cycling stability (98.9% capability retention after 500 cycles at 5 C). Its excellent electrochemical properties root in the large surface area, high grain-boundary density and pseudocapacitive effect of LTO-TOB. This work reveals that LTO-TOB composite can be a potential anode for high power and energy density lithium-ion batteries.

Keywords: Li4Ti5O12; charge transfer; electrochemistry; lithium-ion batteries; surface modification.