Stabilizing Surface Lattice On- (0

IF 16.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2025-03-28 DOI:10.1002/anie.202503100

Wenguang Zhao, Mingyang Li, Zijian Li, Hengyu Ren, Xiaohu Wang, Xingxing Yin, Wangyang Ding, Guojie Chen, Shiming Chen, Haocong Yi, Shunning Li, Jun Wang, Dong Zhou, Lin Zhou, Hai Lin, Bin Fei, Feng Pan, Qinghe Zhao

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引用次数: 0

Abstract

The instability of surface lattice On- (0<n<2) in the charged LiCoO₂ (LCO) limits its long-term cycling stability beyond 4.55 V vs. Li/Li⁺. Herein, the spinel and rock-salt (RS) phases are constructed on the LCO surface to stabilize lattice On-, namely S-LCO and R-LCO, respectively. Upon long-term cycling at 4.6 V, the loss of lattice On- leads to a progressive deterioration of surface spinel phase, which ultimately transfers to a strong Li+-blocking phase. In contrast, for R-LCO, the surface lattice On- in the RS phase retains stable in long-term cycles. Theoretical calculations reveal that the migration barriers of lattice On- are significantly higher in the RS phase than that in the spinel phase. Due to the stabilized surface lattice On-, the R-LCO||Li cell shows a impressive capacity retention of 78.6% in 1000 cycles at 4.6 V (current of 1 C), and superior floating charge durability at 45℃. This study highlights the importance of surface structure tailoring in developing the advanced LCO cathodes.

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来源期刊

Angewandte Chemie International Edition 化学-化学综合

CiteScore

26.60

自引率

6.60%

发文量

3549

审稿时长

1.5 months

期刊介绍： Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.