Vacancy-enhanced oxygen redox and structural stability of spinel LiMnO

Vacancies have been proved effective in activating the oxygen redox and stabilizing the structure of the oxide cathode materials for the Na-ion batteries, but their effect on the cathode materials of the Li-ion batteries is unclear. We herein show that they have similar effect on spinel [Li 4/7 Mn 2...

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Published in:Chemical communications (Cambridge, England) England), 2022-10, Vol.58 (83), p.11685-11688
Main Authors: Yang, Lu, Liu, Zepeng, Li, Shuwei, Hu, Zhiwei, Kong, Qingyu, Shen, Xi, Liu, Qi, Zhu, He, Chen, Jin-Ming, Haw, Shu-Chih, Gao, Yurui, Yingying, Wang, Su, Dong, Wang, Xuefeng, Yu, Richeng, Wang, Zhaoxiang, Chen, Liquan
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Summary:Vacancies have been proved effective in activating the oxygen redox and stabilizing the structure of the oxide cathode materials for the Na-ion batteries, but their effect on the cathode materials of the Li-ion batteries is unclear. We herein show that they have similar effect on spinel [Li 4/7 Mn 2/7 1/7 ] 8a [Li 4/7 Mn 10/7 ] 16d [O 4− x ′ ] 32e . Soft-chemistry prepared spinel [Li 4/7 Mn 2/7 1/7 ] 8a [Li 4/7 Mn 10/7 ] 16d [O 4− x ′ ] 32e (Li 2 Mn 3 O 7− x ) with both Li-O- and Li-O-Li configurations exhibits oxygen redox and low-strain features during cycling.
ISSN:1359-7345
1364-548X
DOI:10.1039/d2cc03259g