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A high-quality mechanofusion coating for enhancing lithium-ion battery cathode material performance

Published online by Cambridge University Press:  05 October 2018

Lituo Zheng ,
T.D. Hatchard  and
M.N. Obrovac Open the ORCID record for M.N. Obrovac [Opens in a new window]
Lituo Zheng
Affiliation:
Department of Chemistry, Dalhousie University, Halifax, N.S., B3H 4R2, Canada
T.D. Hatchard
Affiliation:
Department of Chemistry, Dalhousie University, Halifax, N.S., B3H 4R2, Canada
M.N. Obrovac*
Affiliation:
Department of Chemistry, Dalhousie University, Halifax, N.S., B3H 4R2, Canada Department of Physics, Dalhousie University, Halifax, N.S., B3H 4R2, Canada
*
Address all correspondence to M. N. Obrovac at mnobrovac@dal.ca
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Abstract

Lithium (Li)-ion battery cathode materials are typically coated to improve cycling performance, using aqueous-based coating techniques that require filtering, drying, and even sintering of the final product. Here, spherical LiNi0.6Mn0.2Co0.2O2 particles were coated with nano-Al2O3 using the dry mechanofusion method. This method produced a durable, non-porous Al2O3 coating that is retained during slurry making. Mechanofusion coatings significantly improved Li-ion battery cathode cycling at high voltages, enabling high energy densities, while offering inexpensive, scalable, and environmentally friendly solvent-free synthesis. This opens up new possibilities, since, not being limited by synthesis chemistry, mechanofusion can in principle be used to apply any coating material.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 1 , March 2019 , pp. 245 - 250
Copyright
Copyright © Materials Research Society 2018 

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