Abstract
Li4Ti5O12 is regarded as the ideal anode material for its stable structure, high charge/discharge platform, and safety performance. But low ionic and electronic conductivity of the Li4Ti5O12 anode material under the condition of low temperature greatly limit its application in practical production. In this paper, some modified methods for improving the low-temperature electrochemical performance of Li4Ti5O12 anode material were summarized. Meanwhile, we explored its influence mechanisms at low temperature, one is, with the subtle changes of lattice parameters and oxygen atom fraction coordinates of Li4Ti5O12 at low temperature, the changes of the bond length influence the structural stability of Li4Ti5O12 and the diffusion path of lithium ions; the other reason is that the charge transfer resistance increases obviously and the lithium ion diffusion coefficient reduces under low temperature. Finally, the research directions for improving the low-temperature electrochemical performance were proposed.
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