Cost-effective Li4Ti5O12/C–S prepared by industrial H2TiO3 under a carbon reducing atmosphere as a superior anode for Li-ion batteries. Issue 1 (1st January 2023)

• Record Type: Journal Article
• Authors: Jiang, Xinyu; Ma, Guangqiang; Ke, Yuqiu; Deng, Lin; Chen, Qiyuan
• Is Part Of: Ceramics international. Volume 49:Issue 1(2023)
• Page Start: 625
• Page End: 634
• Publication Date: 2023-01-01
• Subjects: H2TiO3 -- SO42− -- Carbon reducing atmosphere -- Li4Ti5O12 anode material -- Li-ion batteries; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.09.031
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Spinel-type Li4 Ti5 O12 (LTO) is known as a "zero-strain" material due to its negligible structural change during the charge/discharge process. However, high production cost and poor electrical conductivity limit the wide application of spinel-type LTO. Herein, a novel preparation process was developed to prepare a Li4 Ti5 O12 /C–S composite using industrial H2 TiO3 as the titanium source. In the calcination process under a carbon reducing atmosphere, SO4 2− adsorbed on industrial H2 TiO3 not only promotes the carbonization of glucose on the surface of LTO but also introduces S heteroatoms into the carbon coating layer in the form of C–S bonds through a series of reactions with glucose, which significantly improves the overall conductivity and the Li + diffusion coefficient of the material. Therefore, the synthesized Li4 Ti5 O12 /C–S composite exhibits excellent rate performance and cycling stability, with a specific capacity of 135.88 mAh g −1 even at 10C and a capacity decay rate of only 0.011% per cycle after 1000 cycles at 5C. This study delivers a novel method for the industrial production of LTO with both cost and performance advantages.