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In situ growth of Co3O4 coating layer derived from MOFs on LiNi0.8Co0.15Al0.05O2 cathode materials

In situ growth of Co3O4 coating layer derived from MOFs on LiNi0.8Co0.15Al0.05O2 cathode materials LiNi0.8Co0.15Al0.05O2 (NCA) has become one of the research focuses due to its advantages including low cost and high reversible capacity. However, many drawbacks such as the dissolution of the cation into the electrolyte caused by hydrofluoric acid severely limited its electrochemical performance. In this study, Co3O4 derived from metal-organic frameworks (MOFs) is coated on the surface of commercial NCA utilizing in situ growth followed by annealing. The structure and morphology of the samples are characterized by X-ray diffraction, scanning electron microscope, and transmission electron microscope. NCA@Co3O4 delivers a remarkable capacity retention of 73.7% and 84.4% at 1 C and 2 C after 100 cycles at each rate, respectively. Meanwhile, the rate performance of NCA@Co3O4 is significantly improved. The inhibition of the side reaction between cathode materials and electrolyte, and the reduced charge-transfer resistance that brought by Co3O4 coating layer are the main reasons for the excellent electrochemical performance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

In situ growth of Co3O4 coating layer derived from MOFs on LiNi0.8Co0.15Al0.05O2 cathode materials

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References (56)

Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-018-2726-9
Publisher site
See Article on Publisher Site

Abstract

LiNi0.8Co0.15Al0.05O2 (NCA) has become one of the research focuses due to its advantages including low cost and high reversible capacity. However, many drawbacks such as the dissolution of the cation into the electrolyte caused by hydrofluoric acid severely limited its electrochemical performance. In this study, Co3O4 derived from metal-organic frameworks (MOFs) is coated on the surface of commercial NCA utilizing in situ growth followed by annealing. The structure and morphology of the samples are characterized by X-ray diffraction, scanning electron microscope, and transmission electron microscope. NCA@Co3O4 delivers a remarkable capacity retention of 73.7% and 84.4% at 1 C and 2 C after 100 cycles at each rate, respectively. Meanwhile, the rate performance of NCA@Co3O4 is significantly improved. The inhibition of the side reaction between cathode materials and electrolyte, and the reduced charge-transfer resistance that brought by Co3O4 coating layer are the main reasons for the excellent electrochemical performance.

Journal

IonicsSpringer Journals

Published: Sep 17, 2018

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