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A medium-entropy transition metal oxide cathode for high-capacity lithium metal batteries
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Pei, Yi, Chen, Qing, Wang, Meiyu, Zhang, Pengjun, Ren, Qingyong, Qin, Jingkai, Xiao, Penghao, Song, Li, Chen, Yu, Yin, Wen, Tong, Xin, Zhen, Liang, Wang, Peng and Xu, Cheng-Yan (2022) A medium-entropy transition metal oxide cathode for high-capacity lithium metal batteries. Nature Communications, 13 (1). 6158. doi:10.1038/s41467-022-33927-0 ISSN 2041-1723.
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WRAP-A-medium-entropy-transition-metal-oxide-cathode-for-high-capacity-lithium-metal-batteries-Wang-2022.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (3713Kb) | Preview |
Official URL: https://doi.org/10.1038/s41467-022-33927-0
Abstract
The limited capacity of the positive electrode active material in non-aqueous rechargeable lithium-based batteries acts as a stumbling block for developing high-energy storage devices. Although lithium transition metal oxides are high-capacity electrochemical active materials, the structural instability at high cell voltages (e.g., >4.3 V) detrimentally affects the battery performance. Here, to circumvent this issue, we propose a Li1.46Ni0.32Mn1.2O4-x (0 < x < 4) material capable of forming a medium-entropy state spinel phase with partial cation disordering after initial delithiation. Via physicochemical measurements and theoretical calculations, we demonstrate the structural disorder in delithiated Li1.46Ni0.32Mn1.2O4-x, the direct shuttling of Li ions from octahedral sites to the spinel structure and the charge-compensation Mn3+/Mn4+ cationic redox mechanism after the initial delithiation. When tested in a coin cell configuration in combination with a Li metal anode and a LiPF6-based non-aqueous electrolyte, the Li1.46Ni0.32Mn1.2O4-x-based positive electrode enables a discharge capacity of 314.1 mA h g−1 at 100 mA g−1 with an average cell discharge voltage of about 3.2 V at 25 ± 5 °C, which results in a calculated initial specific energy of 999.3 Wh kg−1 (based on mass of positive electrode’s active material).
Item Type: | Journal Article | |||||||||||||||||||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||
SWORD Depositor: | Library Publications Router | |||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Lithium cells, Lithium ion batteries, Transition metal oxides -- Electric properties | |||||||||||||||||||||
Journal or Publication Title: | Nature Communications | |||||||||||||||||||||
Publisher: | Nature Publishing Group | |||||||||||||||||||||
ISSN: | 2041-1723 | |||||||||||||||||||||
Official Date: | 18 October 2022 | |||||||||||||||||||||
Dates: |
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Volume: | 13 | |||||||||||||||||||||
Number: | 1 | |||||||||||||||||||||
Number of Pages: | 13 | |||||||||||||||||||||
Article Number: | 6158 | |||||||||||||||||||||
DOI: | 10.1038/s41467-022-33927-0 | |||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||
Date of first compliant deposit: | 21 November 2022 | |||||||||||||||||||||
Date of first compliant Open Access: | 21 November 2022 | |||||||||||||||||||||
RIOXX Funder/Project Grant: |
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