Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/11044
Title: Optimizing the structure of layered cathode material for higher electrochemical performance by elucidating structural evolution during heat processing
Authors: Huang, ZY
Chu, MH
Wang, R
Zhu, WM
Zhao, WG
Wang, CQ
Zhang, YJ
He, LH
Chen, J
Deng, SH
Mei, LW
Kan, WH
Avdeev, M
Pan, F
Xiao, YG
Keywords: Neutron diffraction
Phase transformations
Cathodes
Lithium
Nickel
Lithium ion batteries
Issue Date: 1-Dec-2020
Publisher: Elsevier
Citation: Huang, Z., Chu, M., Wang, R., Zhu, W., Zhao, W., Wang, C., Zhang, Y., He, L., Chen, J., Deng, S., Mei, L., Kan, W. H., Avdeev, M., Pan, F., & Xiao, Y. (2020). Optimizing the structure of layered cathode material for higher electrochemical performance by elucidating structural evolution during heat processing. Nano Energy, 78, 105194. doi:10.1016/j.nanoen.2020.105194
Abstract: Improving electrochemical performance of cathode materials for lithium-ion batteries requires comprehensive understanding of their structural properties which could facilitate or impede the diffusion of lithium during charge-discharge. In order to optimize the structure and improve the electrochemical performance of layered cathode material, the detailed structural evolution as a function of heat treatment temperature in LiNi0.8Co0.1Mn0.1O2 was investigated by in-situ and ex-situ neutron powder diffraction methods. We show that both cycling stability and rate performance of LiNi0.8Co0.1Mn0.1O2 can be improved by performing heat treatment at 400 °C, which is attributed to the optimization of surface structure and the enlargement of c/a ratio. Heat treatment of LiNi0.8Co0.1Mn0.1O2 at higher temperature induces a layered-to-rock-salt structure phase transition accompanied with the precipitation of lithium oxide. A 3D phase diagram, which correlates the high temperature phases and room temperature phases, is constructed. The presentation of comprehensive phase diagrams up to 1000 °C could provide the basis for further research on not only synthesis strategy but also thermal stability in Ni-rich layered cathode materials. © 2020 Elsevier Ltd.
URI: https://doi.org/10.1016/j.nanoen.2020.105194
https://apo.ansto.gov.au/dspace/handle/10238/11044
ISSN: 2211-2855
Appears in Collections:Journal Articles

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