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Plane-Selective Coating of Li2SnO3 on Li[NixCo1-x]O-2 for High Power Li ion Batteries

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Title
Plane-Selective Coating of Li2SnO3 on Li[NixCo1-x]O-2 for High Power Li ion Batteries
Author(s)
Kim, H; Choi, G; Kim, S; Donghoon Lee; Doo, SW; Jungwon Park; Lee, WB; Lee, KT
Subject
ATOMIC LAYER DEPOSITION, ; TRANSITION-METAL DISSOLUTION, ; CATHODE MATERIALS, ; LITHIUM, ; LICOO2, ; PERFORMANCE, ; PASSIVATION, ; REDUCTION, ; STABILITY, ; EVOLUTION
Publication Date
2020-09
Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.11, no.17, pp.7096 - 7102
Publisher
AMER CHEMICAL SOC
Abstract
© 2020 American Chemical Society. Interphase engineering is becoming increasingly important in improving the electrochemical performance of cathode materials for rechargeable batteries, including Li ion, Li metal, and all-solid-state batteries, because irreversible surface reactions, such as electrolyte decomposition, and transition metal dissolution, constitute one of these batteries' failure modes. In this connection, various surface-engineered cathode materials have been investigated to improve interfacial properties. No synthesis methods, however, have considered a plane-selective surface modification of cathode materials. Herein, we introduce the basal-plane-selective coating of Li2SnO3 on layered Li[NixCo1-x]O-2 (x = 0 and 0.5) using the concept of the thermal phase segregation of Sn-doped Li[NixCo1-x]O-2 due to the solubility variation of Sn in Li[NixCo1-x]O-2 with respect to temperature. The plane-selective surface modification enables the formation of Li2SnO3 nanolayers on only the Li[NixCo1-x]O-2 basal plane without hindering the charge transfer of Li+ ions. As a result, the vertical heterostructure of Li[NixCo1-x]O-2-Li2SnO3 core-shells show promising electrochemical performance
URI
https://pr.ibs.re.kr/handle/8788114/8483
DOI
10.1021/acs.jpclett.0c01829
ISSN
1948-7185
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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