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Title: Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release

Here, voltage fade is a major problem in battery applications for high-energy Lithium- and Manganese-rich (LMR) layered materials. Because of the complexity in the LMR structure, the voltage fade mechanism is not well understood. Here we conduct in situ and ex situ studies on a typical LMR material (Li 1.2Ni 0.15Co 0.1Mn 0.55O 2) during charge-discharge cycling, using multi-length-scale X-ray spectroscopic and 3D electron microscopic imaging techniques. Through probing from surface to bulk, from individual to the whole ensembles of particles, we show that the average valence states of each type of transition metal cations are continuously reduced, which is attributed to the oxygen release from LMR.
Authors:
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Publication Date:
Report Number(s):
BNL-207813-2018-JAAM
Journal ID: ISSN 2058-7546
Grant/Contract Number:
AC02-06CH11357; SC0012704; 2016YFA0202500; 51421002; NRF-2017M1A2A2044502; AC02-98CH10886
Type:
Accepted Manuscript
Journal Name:
Nature Energy
Additional Journal Information:
Journal Volume: 3; Journal Issue: 8; Journal ID: ISSN 2058-7546
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Chinese Academy of Sciences (CAS); National Key R&D Program of China; National Natural Science Foundation of China (NNSFC); National Research Foundation of Korea (NRF)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; batteries; electrochemistry
OSTI Identifier:
1467843
Alternate Identifier(s):
OSTI ID: 1460715

Hu, Enyuan, Yu, Xiqian, Lin, Ruoqian, Bi, Xuanxuan, Lu, Jun, Bak, Seongmin, Nam, Kyung-Wan, Xin, Huolin L., Jaye, Cherno, Fischer, Daniel A., Amine, Kahlil, and Yang, Xiao-Qing. Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release. United States: N. p., Web. doi:10.1038/s41560-018-0207-z.
Hu, Enyuan, Yu, Xiqian, Lin, Ruoqian, Bi, Xuanxuan, Lu, Jun, Bak, Seongmin, Nam, Kyung-Wan, Xin, Huolin L., Jaye, Cherno, Fischer, Daniel A., Amine, Kahlil, & Yang, Xiao-Qing. Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release. United States. doi:10.1038/s41560-018-0207-z.
Hu, Enyuan, Yu, Xiqian, Lin, Ruoqian, Bi, Xuanxuan, Lu, Jun, Bak, Seongmin, Nam, Kyung-Wan, Xin, Huolin L., Jaye, Cherno, Fischer, Daniel A., Amine, Kahlil, and Yang, Xiao-Qing. 2018. "Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release". United States. doi:10.1038/s41560-018-0207-z.
@article{osti_1467843,
title = {Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release},
author = {Hu, Enyuan and Yu, Xiqian and Lin, Ruoqian and Bi, Xuanxuan and Lu, Jun and Bak, Seongmin and Nam, Kyung-Wan and Xin, Huolin L. and Jaye, Cherno and Fischer, Daniel A. and Amine, Kahlil and Yang, Xiao-Qing},
abstractNote = {Here, voltage fade is a major problem in battery applications for high-energy Lithium- and Manganese-rich (LMR) layered materials. Because of the complexity in the LMR structure, the voltage fade mechanism is not well understood. Here we conduct in situ and ex situ studies on a typical LMR material (Li1.2Ni0.15Co0.1Mn0.55O2) during charge-discharge cycling, using multi-length-scale X-ray spectroscopic and 3D electron microscopic imaging techniques. Through probing from surface to bulk, from individual to the whole ensembles of particles, we show that the average valence states of each type of transition metal cations are continuously reduced, which is attributed to the oxygen release from LMR.},
doi = {10.1038/s41560-018-0207-z},
journal = {Nature Energy},
number = 8,
volume = 3,
place = {United States},
year = {2018},
month = {7}
}