Single crystalline lithium titanate nanostructure with enhanced rate performance for lithium ion battery
Single crystalline lithium titanate nanostructure with enhanced rate performance for lithium ion battery
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DOI：
10.1016/j.jpowsour.2011.11.032
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发表时间：
2012-03
影响因子：
9.2
通讯作者：
J. Lu;Caiyun Nan;Q. Peng;Yadong Li
中科院分区：
文献类型：
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作者：
J. Lu;Caiyun Nan;Q. Peng;Yadong Li
本文报道了40 nm近均匀钛酸锂（Li 4 Ti 5 O 12）单晶的合成及其电化学性能。由水热合成的α-Li 2 TiO 3制备的立方NaCl型（Li 0. 4 H 0. 6）2 TiO 3纳米晶在400°C下转变为立方尖晶石型Li 4 Ti 5 O 12纳米晶。由于Li+离子扩散路径的减少，制备的Li 4 Ti 5 O 12纳米晶显示出降低的电荷转移阻抗，并在大电流充电/放电下表现出良好的性能。
Here we report the synthesis and electrochemical performance of 40nm near-uniform lithium titanate (Li4Ti5O12) single crystals. The cubic spinel Li4Ti5O12nanocrystals are transformed without size changes at 400°C from cubic NaCl type (Li0.4H0.6)2TiO3nanocrystals that are prepared from hydrothermal synthesized α-Li2TiO3. The prepared Li4Ti5O12nanocrystals show reduced charge-transfer impedance and exhibit favorable performance under high current charging/discharging due to the reduced Li+ion diffusion path.