Improvement in high-voltage and high rate cycling performance of nickel-rich layered cathode materials via facile chemical vapor deposition with methane

Nickel-rich layered-oxide materials are considered promising candidates for application as cathode material in high-energy lithium ion batteries. However, their cycling performance at high voltages and rate conditions require further improvement for the purpose of commercialization. Here, we report...

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Bibliographic Details
Published in:Electrochimica acta 2017-03, Vol.230, p.308-315
Main Authors: Hyuk Son, In, Park, Kwangjin, Hwan Park, Jong
Format: Article
Language:English
Subjects:
artificial SEI layers
Battery cycles
Cathodes
Chemical vapor deposition
Commercialization
Conductivity
Deformation mechanisms
Electric potential
Electrical resistivity
Electrode materials
High Rate Cycling Performance
high voltage Li ion battery
High voltages
Interface stability
Li ion battery
Lithium carbonate
Lithium-ion batteries
metal oxide cathode materials
Methane
Nickel
Solid electrolytes
Structural stability
Studies
Surface stability
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Summary:Nickel-rich layered-oxide materials are considered promising candidates for application as cathode material in high-energy lithium ion batteries. However, their cycling performance at high voltages and rate conditions require further improvement for the purpose of commercialization. Here, we report on the facile surface modification of nickel-rich layered oxide by chemical vapor deposition with methane which yields a conductive and protective artificial solid electrolyte interphase layer consisting of amorphous carbon, alkyl lithium carbonate, and lithium carbonate. We examine the mechanism of the protective layer formation and structural deformation of the nickel-rich layered oxide during chemical vapor deposition with methane. Via optimizing the reaction conditions, we improve the electrical conductivity as well as the interfacial stability of the nickel-rich layered oxide without inducing structural deformation. The surface-modified nickel-rich layered oxide exhibits an improved performance due to the resulting enhanced rate capability, high initial efficiency, and long cycle life at high voltage (>4.5V).
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.01.198