Hydrothermal method preparing lithium ion battery cathode material Li₄Ti₅O₁₂ using metatitanic acid

ABSTRACT

Using metatitanic acid and lithium hydroxide as raw material, lithium ion battery cathode material Li₄Ti₅O₁₂ was prepared by one step hydrothermal ion exchange synthesis method. The effects of molar ratio of Li and Ti, reaction temperature and reaction time were investigated respectively. The prepared lithium titanate was characterized by XRD and SEM for the structure and morphology and tested the battery performance through assembling the CR2016 lithium ion button battery. Experimental results showed that pure spinel type lithium titanate can be obtained when molar ratio of Li and Ti was 0.85, reaction temperature was 170°C࿵ E; 200°C after 24 h reaction, of which the diffraction peaks were one to one corresponding to diffraction peaks in the standard card (PDF#26-1198). The products were of good electrical properties, when the rate was 0.1C, the first charge/discharge capacity reached 165.2 mAh/g, the capacity retention rate was 97% after 30 charge/discharge cycles.

KEYWORDS:

• Metatitanic acid
• one step hydrothermal method
• lithium titanate

CLC number:

• TB331

Document code:

• A

Funding

This work was sponsored by the Applied basic project of Sichuan Province (item No.: 2015JY0130).