Temperature-Sensitive Structure Evolution of Lithium–Manganese-Rich Layered Oxides for Lithium-Ion Batteries | Zendy

Haijun Yu | Zendy; YeongGi So | Zendy; Yang Ren | Zendy; Tianhao Wu | Zendy; Gencai Guo | Zendy; Ruijuan Xiao | Zendy; Jun Lü | Zendy; Hong Li | Zendy; Yubo Yang | Zendy; Haoshen Zhou | Zendy; RuZhi Wang | Zendy; Khalil Amine | Zendy; Yuichi Ikuhara | Zendy

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Temperature-Sensitive Structure Evolution of Lithium–Manganese-Rich Layered Oxides for Lithium-Ion Batteries

Author(s) -

Haijun Yu,

YeongGi So,

Yang Ren,

Tianhao Wu,

Gencai Guo,

Ruijuan Xiao,

Jun Lü,

Hong Li,

Yubo Yang,

Haoshen Zhou,

RuZhi Wang,

Khalil Amine,

Yuichi Ikuhara

Publication year - 2018

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/jacs.8b07858

Subject(s) - chemistry , spinel , manganese , lithium (medication) , structural stability , crystal structure , cathode , structural change , electrochemistry , ion , monoclinic crystal system , chemical engineering , chemical physics , electrode , crystallography , materials science , metallurgy , organic chemistry , engineering , endocrinology , structural engineering , economics , macroeconomics , medicine

Cathodes of lithium-rich layered oxides for high-energy Li-ion batteries in electrically powered vehicles are attracting considerable attention by the research community. However, current research is insufficient to account for their complex reaction mechanism and application. Here, the structural evolution of lithium-manganese-rich layered oxides at different temperatures during electrochemical cycling has been investigated thoroughly, and their structural stability has been designed. The results indicated structure conversion from the two structures into a core-shell structure with a single distorted-monoclinic LiTMO 2 structure core and disordered-spinel/rock salt structure shell, along with lattice oxygen extraction and lattice densification, transition- metal migration, and aggregation on the crystal surface. The structural conversion behavior was found to be seriously temperature sensitive, accelerated with higher temperature, and can be effectively adjusted by structural design. This study clarifies the structural evolution mechanism of these lithium-rich layered oxides and opens the door to the design of similar high-energy materials with better cycle stability.

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