Lithium storage in Li4Ti5O12 spinel: the full static picture from electron microscopy.

Lu, Xia; Zhao, Liang; He, Xiaoqing; Xiao, Ruijuan; Gu, Lin; Hu, Yong-Sheng; Li, Hong; Wang, Zhaoxiang et al. · Adv Mater · 2012

basic_science · Level V

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Abstract

The full static picture of Li storage in Li(4)Ti(5)O(12) is derived using the latest spherical aberration-corrected scanning transmission electron microscopy and first-principles calculations. The accommodation of the additional Li(+) is directly visualized and the distribution of electrons introduced by lithium insertion deduced. Moreover, Li(4)Ti(5)O(12) is found to transform into Li(7)Ti(5)O(12) on lithiation by developing a dislocation-free coherent hetero-interface.

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