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Surface reduction stabilizes the single-crystalline Ni-Rich layered cathode for Li-Ion batteries
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Fan, Qinglu, Zuba, Mateusz Jan, Zong, Yanxu, Menon, Ashok S., Pacileo, Anthony T., Piper, Louis F. J., Zhou, Guangwen and Liu, Hao (2022) Surface reduction stabilizes the single-crystalline Ni-Rich layered cathode for Li-Ion batteries. ACS Applied Materials & Interfaces, 14 (34). pp. 38795-38806. doi:10.1021/acsami.2c09937 ISSN 1944-8244.
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Official URL: https://doi.org/10.1021/acsami.2c09937
Abstract
The surface of the layered transition metal oxide cathode plays an important role in its function and degradation. Modification of the surface structure and chemistry is often necessary to overcome the debilitating effect of the native surface. Here, we employ a chemical reduction method using CaI2 to modify the native surface of single-crystalline layered transition metal oxide cathode particles. High-resolution transmission electron microscopy shows the formation of a conformal cubic phase at the particle surface, where the outmost layer is enriched with Ca. The modified surface significantly improves the long-term capacity retention at low rates of cycling, yet the rate capability is compromised by the impeded interfacial kinetics at high voltages. The lack of oxygen vacancy generation in the chemically induced surface phase transformation likely results in a dense surface layer that accounts for the improved electrochemical stability and impeded Li-ion diffusion. This work highlights the strong dependence of the electrode’s (electro)chemical stability and intercalation kinetics on the surface structure and chemistry, which can be further tailored by the chemical reduction method.
Item Type: | Journal Article | ||||||||||||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||||||||
SWORD Depositor: | Library Publications Router | ||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Lithium ion batteries, Lithium ion batteries -- Materials, Transition metal oxides, Cathodes , Transmission electron microscopy | ||||||||||||||||||
Journal or Publication Title: | ACS Applied Materials & Interfaces | ||||||||||||||||||
Publisher: | American Chemical Society | ||||||||||||||||||
ISSN: | 1944-8244 | ||||||||||||||||||
Official Date: | 31 August 2022 | ||||||||||||||||||
Dates: |
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Volume: | 14 | ||||||||||||||||||
Number: | 34 | ||||||||||||||||||
Page Range: | pp. 38795-38806 | ||||||||||||||||||
DOI: | 10.1021/acsami.2c09937 | ||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||
Reuse Statement (publisher, data, author rights): | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see ACS Articles on Request ].” | ||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
Copyright Holders: | Copyright © 2022 American Chemical Society | ||||||||||||||||||
Date of first compliant deposit: | 12 October 2022 | ||||||||||||||||||
Date of first compliant Open Access: | 16 August 2023 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
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