Design and property investigations of manganese-based cathode material LiδNi0.25-zMn0.75-zCo2zOy (0 ≤ δ ≤ 1.75) for lithium-ion batteries

On the foundation of LiNiCoMn quaternary phase diagram, a series of manganese-based cathode materials LiδNi0.25-zMn0.75-zCo2zOy (0 ≤ δ ≤ 1.75, z = 0, 0.05, 0.15 and 0.25) have been designed and systematically studied. These materials are synthesized via a carbonate co-precipitation route and followe...

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Bibliographic Details
Published in:Electrochimica acta 2019-03, Vol.298, p.505-517
Main Authors: Yang, Tonghuan, Wang, Dongge, Shi, Xixi, Han, Yan, Zhang, Hongzhou, Song, Dawei, Zhang, Lianqi
Format: Article
Language:English
Subjects:
Cathode materials
Cobalt-content
Lithium-content
Lithium-ion batteries
Phase diagram
Phase evolution
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Summary:On the foundation of LiNiCoMn quaternary phase diagram, a series of manganese-based cathode materials LiδNi0.25-zMn0.75-zCo2zOy (0 ≤ δ ≤ 1.75, z = 0, 0.05, 0.15 and 0.25) have been designed and systematically studied. These materials are synthesized via a carbonate co-precipitation route and followed by a solid-state reaction. The effects of cobalt and lithium contents on phase transformations morphologies, and electrochemical behaviors of the cathode materials are overall compared and evaluated. The results reveal that, with δ increases, structures of the materials present phase evolution from spinel phase (δ ≤ 0.5) to integrated composite of spinel and layered phase (Fd3¯m and R3¯m, 0.5 
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2018.12.111