INORGANICCHEMICALSINDUSTRY ›› 2013, Vol. 45 ›› Issue (11): 61-.
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Li Jie1,Long Yunfei1,Su Jing1,Lü Xiaoyan2,Wen Yanxuan1
Online:
Published:
Abstract: In order to optimize the process of preparing spinel Li4Ti5O12,isothermal kinetics for the solid?鄄state reaction between Li2CO3 and TiO2 was investigated by the means of TG,XRD,and SEM etc..Results of the isothermal kinetics revealed that the formation of Li4Ti5O12 at 400 ℃ was controlled by the diffusion process,and that at 450 ℃ was controlled by the interface chemical reaction.However,the formation of Li4Ti5O12 at 500~600 ℃ was controlled by the random nucleation and growth model,and Avrami equation G(α)=[-ln(1-α)]2 could be used to describe the synthesis kinetics of Li4Ti5O12,and the apparent activation energy was 191.35 kJ/mol.Based on the kinetic results,the synthesis process was optimized.The Li4Ti5O12 sample prepared at 850 ℃ for 8 h delivered a discharge capacity of 167 mA·h/g with less capacity loss after 25 cycles.
Key words: lithium-ion battery, anode materials, Li4Ti5O12
CLC Number:
TQ131.11
LI Jie, LONG Yun-Fei, SU Jing, 吕Xiao-Yan , WEN Yan-Xuan. Synthesis optimization of Li4Ti5O12 from Li2CO3 and TiO2[J]. INORGANICCHEMICALSINDUSTRY, 2013, 45(11): 61-.
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