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American Chemical Society, Chemistry of Materials, 17(23), p. 3953-3960, 2011

DOI: 10.1021/cm201452q

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Structural Origin of Overcharge-Induced Thermal Instability of Ni-Containing Layered-Cathodes for High-Energy-Density Lithium Batteries

Journal article published in 2011 by Lijun Wu, 郑金成, Kyung-Wan Nam ORCID, Xiaojian Wang, Yongning Zhou, Jin-Cheng Zheng, Xiao-Qing Yang, Yimei Zhu
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

Using a combination of time-resolved X-ray diffraction (XRD), in situ transmission electron microscopy (TEM), and first principles calculations, we explore the structural origin of the overcharge induced thermal instability of two cathode materials, LiNi(0.8)Co(0.15)Al(0.05)O(2) and LiNi(1/3)Co(1/3)Mn(1/3)O(2), which exhibit significant difference in thermal stabilities. Detailed TEM analysis reveals, for the first time, a complex core shell-surface structure of the particles in both materials that was not previously detected by XRD. Structural comparison indicates that the overcharged Li(x)Ni(0.8)Co(0.15)Al(0.05)O(2) (x