Mechanisms of the decrease in low-temperature electrochemical performance of Li₄Ti₅O₁₂-based anode materials.

ABSTRACT: The electrochemical performances of Li₄Ti₅O₁₂ (LTO) and Li₄Ti₅O₁₂-rutile TiO₂ (LTO-RTO) composite electrodes at low temperatures were evaluated. The electrochemical performance of both electrodes decreased at low temperatures; regardless, the LTO-RTO electrode performed better than the LTO electrode. First, high viscosity and low ion conductivity of liquid electrolytes at low temperatures significantly reduce electrochemical performance. Second, cycling at low temperatures changes the crystal structure of LTO-based electrodes, impeding lithium ion diffusion and even causing the diffusion path to change from easy to difficult. However, changes in the crystal structure of the LTO-RTO electrode were not sufficient to

SUBMITTER: Huang Q 

PROVIDER: S-EPMC5681549 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature