电化学性能优异的高镍正极材料从表面到体稳定的氟化

IF 16.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2024-12-19 DOI:10.1002/anie.202420413

Jieyu Yang, Guihong Mao, Tengyu Yao, Laifa Shen, Yan Yu

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引用次数: 0

摘要

通过界面氟化和在体相中引入 F 离子作为锚，提高了高镍阴极的高压、高速循环性能。氟化表面促使形成一层薄而致密的 CEI 层，从而促进 Li+ 的迁移并阻碍电解液的侵蚀。此外，体相中以 F 替代 O 形成了强 TM-F 键，从而提高了表面和内部结构的稳定性，阻碍了微裂纹的形成和气体的演化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Fluorination from Surface to Bulk Stabilizing High Nickel Cathode Materials with Outstanding Electrochemical Performance

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Fluorination from Surface to Bulk Stabilizing High Nickel Cathode Materials with Outstanding Electrochemical Performance

Through interfacial fluorination and introducing F ions to bulk phase as anchors, the high-voltage high-rate cycling performance of high nickel cathodes is boosted. The fluorinated surface induces the formation of a thin, dense CEI layer to facilitate Li⁺ migration and hinder electrolyte erosion. Additionally, the substitution of F for O in bulk phase forms strong TM−F bonds, thereby enhancing surface and internal structural stability, and hindering the formation of microcracks and gas evolution.

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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.