Vacancy-enhanced oxygen redox and structural stability of spinel Li2Mn3O7- x

Lu Yang; Zepeng Liu; Shuwei Li; Zhiwei Hu; Qingyu Kong; Xi Shen; Qi Liu; He Zhu; Jin-Ming Chen; Shu-Chih Haw; Yurui Gao; Wang Yingying; Dong Su; Xuefeng Wang; Richeng Yu; Zhaoxiang Wang; Liquan Chen

doi:10.1039/d2cc03259g

Vacancy-enhanced oxygen redox and structural stability of spinel Li₂Mn₃O_{7- x}

Chem Commun (Camb). 2022 Oct 18;58(83):11685-11688. doi: 10.1039/d2cc03259g.

Authors

Lu Yang^{1

2}, Zepeng Liu^{1

3}, Shuwei Li^{1

3}, Zhiwei Hu⁴, Qingyu Kong^{5

6}, Xi Shen⁷, Qi Liu⁸, He Zhu⁸, Jin-Ming Chen⁹, Shu-Chih Haw⁹, Yurui Gao¹⁰, Wang Yingying⁷, Dong Su⁷, Xuefeng Wang^{2

7}, Richeng Yu^{3

7}, Zhaoxiang Wang^{1

2

3}, Liquan Chen¹

Affiliations

¹ Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China. zxwang@iphy.ac.cn.
² College of Material Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China. wxf@iphy.ac.cn.
³ School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China. rcyu@iphy.ac.cn.
⁴ Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany.
⁵ Synchrotron Soleil L'Orme des Merisiers St-Aubin Gif-sur-Yvette Cedex, 91192, France.
⁶ School of Physical Science and Information Technology, Liaocheng University, Liaocheng, 252059, China.
⁷ Laboratory for Advanced Materials and Electron Microscopy, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
⁸ Department of Physics, City University of Hong Kong, Hong Kong 999077, China.
⁹ National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.
¹⁰ Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China.

PMID: 36173359
DOI: 10.1039/d2cc03259g

Abstract

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_4/7Mn_2/7□_1/7]_8a[Li_4/7Mn_10/7]_16d[O_4-x']_32e.