@article{ac2fb3000b694ccdb4559d0b6888aa11,
title = "Probing and suppressing voltage fade of Li-rich Li1.2Ni0.13Co0.13Mn0.54O2 cathode material for lithium-ion battery",
abstract = "The voltage fade of Li-rich layered oxide cathode material Li1.2Ni0.13Co0.13Mn0.54O2 (LNCM) heavily hinders its application in Li-ion batteries. Herein, we revisit the origin of the voltage fade of LNCM and propose a solution to suppress this effect. It is demonstrated that the voltage fade of the LNCM cathode comes from the structural change of the crystal from layer structure to spinel structure, involving all the cations rearrangement. Such rearrangement of all the cations in LNCM is due to the high degree of delithiation and oxygen release at high cutoff voltage of 4.8 V. It is also evidenced that nickel and cobalt change from low valence to high valence at the discharged state, which not only inhibits the transport of lithium ions, but also leads to the loss of high voltage platforms. In particular, the cation rearrangement of Li/Mn causes valence change from Mn4+ to Mn3+, resulting in the decrease of discharge voltage platform at the cutoff voltage of 4.8 V much higher than at 4.6 V. The lower charge cutoff voltage can be a solution to suppress the voltage fade of LNCM cathode materials and have a good stability of LNCM cathode materials without compromising the battery performance.",
keywords = "Cations rearrangement, Li-rich cathode material, Lithium-ion batteries, Structure change, Voltage fade",
author = "Wei Zou and Xia, {Fan Jie} and Song, {Jian Ping} and Liang Wu and Chen, {Liang Dan} and Hao Chen and Yang Liu and Dong, {Wen Da} and Wu, {Si Jia} and Hu, {Zhi Yi} and Jing Liu and Wang, {Hong En} and Chen, {Li Hua} and Yu Li and Peng, {Dong Liang} and Su, {Bao Lian}",
note = "Funding Information: Y. Li acknowledges Hubei Provincial Department of Education for the “Chutian Scholar” program. B. L. Su acknowledges the Chinese Central Government for an “Expert of the State” position in the Program of the “Thousand Talents”. This work is supported by National Key R&D Program of China ( 2016YFA0202602 ), National Natural Science Foundation of China ( U1663225 , 21671155 , 21805220 ), Natural Science Foundation of Hubei Province ( 2018CFB242 , 2018CFA054 ), Major Technology Innovation of Hubei Province ( 2018AAA012 ), Program for Changjiang Scholars Innovative Research Team in University ( IRT_15R52 ). Funding Information: Y. Li acknowledges Hubei Provincial Department of Education for the “Chutian Scholar” program. B. L. Su acknowledges the Chinese Central Government for an “Expert of the State” position in the Program of the “Thousand Talents”. This work is supported by National Key R&D Program of China (2016YFA0202602), National Natural Science Foundation of China (U1663225, 21671155, 21805220), Natural Science Foundation of Hubei Province (2018CFB242, 2018CFA054), Major Technology Innovation of Hubei Province (2018AAA012), Program for Changjiang Scholars Innovative Research Team in University (IRT_15R52). Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",
year = "2019",
month = sep,
day = "20",
doi = "10.1016/j.electacta.2019.06.119",
language = "English",
volume = "318",
pages = "875--882",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier",
}