Roles of Slab-Gliding-Induced Surface Nano-Steps in High-Voltage Instability of LiCoO <sub>2</sub>

-blocking layer, ultimately causing a rapid capacity decay. We further demonstrate that even if a rock-salt (RS) phase forms electrochemically in situ (e-RS) on the LCO surface, it fails to suppress the lattice-O loss due to the emergence of surface nanosteps. In contrast, a prefabricated RS layer (p-RS) with enhanced mechanical robustness effectively inhibits the formation of such nanosteps, thereby intrinsically suppressing lattice-O loss during cycling. This work identifies slab-gliding-induced surface nanosteps as a key structural trigger for lattice-O loss and demonstrates that prefabricated RS coatings offer an effective route to stabilize high-voltage LCO cathodes.

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Publication Details

Journal
Journal of the American Chemical Society
Published
2026-04-06
DOI
https://doi.org/10.1021/jacs.5c20351
Primary Topic
Advancements in Battery Materials
Type
article
Field-Weighted Citation Impact
0.00

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article

Roles of Slab-Gliding-Induced Surface Nano-Steps in High-Voltage Instability of LiCoO 2

Zhefeng Chen, Zhihao Shen, Bin Fei, Shunning Li et al.
Journal of the American Chemical Society
Advancements in Battery Materials
article

Roles of Slab-Gliding-Induced Surface Nano-Steps in High-Voltage Instability of LiCoO 2

Zhefeng Chen, Zhihao Shen, Bin Fei, Shunning Li, Hengyu Ren, Tongsheng Deng, Zijin Xu, He Zhao, Feng Jin, Zijian Li, Haocong Yi, Cong Lin, Shiming Chen, Chunyu Xu, Feng Pan, Wenguang Zhao
article en

Abstract

-blocking layer, ultimately causing a rapid capacity decay. We further demonstrate that even if a rock-salt (RS) phase forms electrochemically in situ (e-RS) on the LCO surface, it fails to suppress the lattice-O loss due to the emergence of surface nanosteps. In contrast, a prefabricated RS layer (p-RS) with enhanced mechanical robustness effectively inhibits the formation of such nanosteps, thereby intrinsically suppressing lattice-O loss during cycling. This work identifies slab-gliding-induced surface nanosteps as a key structural trigger for lattice-O loss and demonstrates that prefabricated RS coatings offer an effective route to stabilize high-voltage LCO cathodes.

Journal of the American Chemical SocietyVol. 148(15)
Fujian Normal University (CN), Hong Kong Polytechnic University (HK), Sun Yat-sen University (CN), Hong Kong University of Science and Technology (HK), Southern University of Science and Technology (CN), The Seventh Affiliated Hospital of Sun Yat-sen University (CN), Peking University Shenzhen Hospital (CN), University of Hong Kong (HK)
National Natural Science Foundation of China, Development and Reform Commission of Shenzhen Municipality
Openalex Percentile: Top 30%
Advancements in Battery Materials
DOISourceOpenAlex
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