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Title: Monitoring the phase evolution in LiCoO2 electrodes during battery cycles using in-situ neutron diffraction technique
Authors: Jena, A
Lee, PH
Pang, WK
Hsiao, KC
Peterson, VK
Darwish, TA
Yepuri, NR
Wu, SH
Chang, H
Liu, RS
Keywords: Phase transformations
Electric batteries
Lithium ions
Neutron diffraction
Issue Date: 3-Dec-2019
Publisher: John Wiley & Sons, Inc
Citation: Jena, A., Lee, P.-H., Pang, W. K., Hsiao, K.-C., Peterson, V. K., Darwish, T., Yepuri, N., Wu, S.-H., Chang, H, & Liu, R.-S. (2020). Monitoring the phase evolution in LiCoO2 electrodes during battery cycles using in‐situ neutron diffraction technique. Journal of the Chinese Chemical Society, 67(3), 344-352. doi:10.1002/jccs.201900448
Abstract: LiCoO2 (LCO) with average particle distribution of 8 μm (LCO-A) and 11 μm (LCO-B) exhibit substantial differences in cycle performance. The half-cells have similar first-cycle discharge capacities of 173 and 175 mAh/g at 0.25 C, but after 100 cycles, the discharge capacities are substantially different, that is, 114 and 141 mAh/g for LCO-A and LCO-B, respectively. Operando neutron powder diffraction of full LCO||Li4Ti5O12 batteries show differences in the LCO reaction mechanism underpinning the electrochemical behavior. LCO-A follows a purely solid solution reaction during cycling compared to the solid solution and two-phase reaction mechanism in LCO-B. The absence of the two-phase reaction in LCO-A is consistent with a homogeneous distribution of Li throughout the particle. The two-phase reaction in LCO-B reflects two distinguishable distributions of Li within the particles. The faster capacity decay in LCO-A is correlated to an increase in electrode cracking during battery cycles. © 2019 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co.
Description: This special issue of the Journal of the Chinese Chemical Society is dedicated to Prof. Chien-Hong Cheng on the occasion of his 70th birthday. 12 articles/reviews representing cutting-edge research carried out by many of Prof. Cheng's friends, colleagues, former students and coworkers are collected in this issue.
ISSN: 2192-6549
Appears in Collections:Journal Articles

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