Selective doping of Li-rich layered oxide cathode materials for high-stability rechargeable Li-ion batteries

[Display omitted] We report the discovery of Li-rich Li1+x[(Ni0.225Co0.15Mn0.625)1−yVy]O2 as a cathode material for rechargeable lithium-ion batteries in which a small amount of tetravalent vanadium (V4+) is selectively and completely incorporated into the manganese sites in the lattice structure. T...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2018, 68(0), , pp.180-186
Main Authors: Han, Dongwook, Park, Kwangjin, Park, Jun-Ho, Yun, Dong-Jin, Son, You-Hwan
Format: Article
Language:English
Subjects:
Coprecipitation
Lithium-rich layered oxide
Rechargeable lithium-ion batteries
Selective doping site
Vanadium ion
화학공학
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Summary:[Display omitted] We report the discovery of Li-rich Li1+x[(Ni0.225Co0.15Mn0.625)1−yVy]O2 as a cathode material for rechargeable lithium-ion batteries in which a small amount of tetravalent vanadium (V4+) is selectively and completely incorporated into the manganese sites in the lattice structure. The unwanted oxidation of vanadium to form a V2O5-like secondary phase during high-temperature crystallization is prevented by uniformly dispersing the vanadium ions in coprecipitated [(Ni0.225Co0.15Mn0.625)1−yVy](OH)2 particles. Upon doping with V4+ ions, the initial discharge capacity (>275mAhg−1), capacity retention, and voltage decay characteristics of the Li-rich layered oxides are improved significantly in comparison with those of the conventional undoped counterpart.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2018.07.044