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Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films

[Image: see text] Layered lithium transition-metal oxides, such as LiCoO(2) and its doped and lithium-rich analogues, have become the most attractive cathode material for current lithium-ion batteries due to their excellent power and energy densities. However, parasitic reactions at the cathode–elec...

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Autores principales: Singh, Deepak P., Birkhölzer, Yorick A., Cunha, Daniel M., Dubbelink, Thijs, Huang, Sizhao, Hendriks, Theodoor A., Lievens, Caroline, Huijben, Mark
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8153391/
https://www.ncbi.nlm.nih.gov/pubmed/34056556
http://dx.doi.org/10.1021/acsaem.1c00603
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author Singh, Deepak P.
Birkhölzer, Yorick A.
Cunha, Daniel M.
Dubbelink, Thijs
Huang, Sizhao
Hendriks, Theodoor A.
Lievens, Caroline
Huijben, Mark
author_facet Singh, Deepak P.
Birkhölzer, Yorick A.
Cunha, Daniel M.
Dubbelink, Thijs
Huang, Sizhao
Hendriks, Theodoor A.
Lievens, Caroline
Huijben, Mark
author_sort Singh, Deepak P.
collection PubMed
description [Image: see text] Layered lithium transition-metal oxides, such as LiCoO(2) and its doped and lithium-rich analogues, have become the most attractive cathode material for current lithium-ion batteries due to their excellent power and energy densities. However, parasitic reactions at the cathode–electrolyte interface, such as metal-ion dissolution and electrolyte degradation, instigate major safety and performance issues. Although metal oxide coatings can enhance the chemical and structural stability, their insulating nature and lattice mismatch with the adjacent cathode material can act as a physical barrier for ion transport, which increases the charge-transfer resistance across the interface and impedes cell performance at high rates. Here, epitaxial engineering is applied to stabilize a cubic (100)-oriented TiO layer on top of single (104)-oriented LiCoO(2) thin films to study the effect of a conductive coating on the electrochemical performance. Lattice matching between the (104) LiCoO(2) surface facets and the (100) TiO plane enables the formation of the titanium mono-oxide phase, which dramatically enhances the cycling stability as well as the rate capability of LiCoO(2). This cubic TiO coating enhances the preservation of the phase and structural stability across the (104) LiCoO(2) surface. The results suggest a more stable Co(3+) oxidation state, which not only limits the cobalt-ion dissolution into the electrolyte but also suppresses the catalytic degradation of the liquid electrolyte. Furthermore, the high c-rate performance combined with high Columbic efficiency indicates that interstitial sites in the cubic TiO lattice offer facile pathways for fast lithium-ion transport.
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spelling pubmed-81533912021-05-27 Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films Singh, Deepak P. Birkhölzer, Yorick A. Cunha, Daniel M. Dubbelink, Thijs Huang, Sizhao Hendriks, Theodoor A. Lievens, Caroline Huijben, Mark ACS Appl Energy Mater [Image: see text] Layered lithium transition-metal oxides, such as LiCoO(2) and its doped and lithium-rich analogues, have become the most attractive cathode material for current lithium-ion batteries due to their excellent power and energy densities. However, parasitic reactions at the cathode–electrolyte interface, such as metal-ion dissolution and electrolyte degradation, instigate major safety and performance issues. Although metal oxide coatings can enhance the chemical and structural stability, their insulating nature and lattice mismatch with the adjacent cathode material can act as a physical barrier for ion transport, which increases the charge-transfer resistance across the interface and impedes cell performance at high rates. Here, epitaxial engineering is applied to stabilize a cubic (100)-oriented TiO layer on top of single (104)-oriented LiCoO(2) thin films to study the effect of a conductive coating on the electrochemical performance. Lattice matching between the (104) LiCoO(2) surface facets and the (100) TiO plane enables the formation of the titanium mono-oxide phase, which dramatically enhances the cycling stability as well as the rate capability of LiCoO(2). This cubic TiO coating enhances the preservation of the phase and structural stability across the (104) LiCoO(2) surface. The results suggest a more stable Co(3+) oxidation state, which not only limits the cobalt-ion dissolution into the electrolyte but also suppresses the catalytic degradation of the liquid electrolyte. Furthermore, the high c-rate performance combined with high Columbic efficiency indicates that interstitial sites in the cubic TiO lattice offer facile pathways for fast lithium-ion transport. American Chemical Society 2021-04-29 2021-05-24 /pmc/articles/PMC8153391/ /pubmed/34056556 http://dx.doi.org/10.1021/acsaem.1c00603 Text en © 2021 The Authors. Published by American Chemical Society Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Singh, Deepak P.
Birkhölzer, Yorick A.
Cunha, Daniel M.
Dubbelink, Thijs
Huang, Sizhao
Hendriks, Theodoor A.
Lievens, Caroline
Huijben, Mark
Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films
title Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films
title_full Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films
title_fullStr Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films
title_full_unstemmed Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films
title_short Enhanced Cycling and Rate Capability by Epitaxially Matched Conductive Cubic TiO Coating on LiCoO(2) Cathode Films
title_sort enhanced cycling and rate capability by epitaxially matched conductive cubic tio coating on licoo(2) cathode films
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8153391/
https://www.ncbi.nlm.nih.gov/pubmed/34056556
http://dx.doi.org/10.1021/acsaem.1c00603
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