Storage Failure Mechanisms and Modifications of Ni-Rich Cathode Materials: From Polycrystalline to Single-Crystal Forms†

IF 5.5 1区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chinese Journal of Chemistry Pub Date : 2024-12-31 DOI:10.1002/cjoc.202400806

Ran An, Yuefeng Su, Chenxing Yang, Xinyu Zhu, Yihong Wang, Yongjian Li, Lai Chen, Yun Lu, Qing Huang, Meng Wang, Ning Li, Feng Wu

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引用次数: 0

Abstract

Ni-rich cathode materials, exemplified by LiNi_1–x–yCo_xMnyO₂ (NCM), have significantly propelled Li-ion battery (LIB) technology forward owing to their high energy density. However, the long-term storage stability of these materials remains a critical challenge that must be addressed. This review provides a comprehensive analysis of the storage failure mechanisms in both polycrystalline (PC-NCM) and single crystal (SC-NCM) forms, a topic that has been seldom reviewed. It delves into the microstructural changes and performance degradation that occur during storage, emphasizing the effects of environmental factors on NCM materials, including the formation of surface impurities and structural deterioration. Additionally, the review discusses various enhancement strategies, such as surface coatings, doping, and gas treatments, which are designed to improve storage stability. Furthermore, the review projects insights from current polycrystalline studies to suggest future research directions aimed at enhancing the air stability of SC-NCM, which is vital for improving the safety and durability of LIBs.

Key Scientists

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富镍正极材料的存储失效机制和修饰：从多晶到单晶形式

以LiNi1-x-yCoxMnyO2 （NCM）为代表的富镍正极材料，由于其高能量密度，极大地推动了锂离子电池（LIB）技术的发展。然而，这些材料的长期储存稳定性仍然是一个必须解决的关键挑战。这篇综述对多晶（PC-NCM）和单晶（SC-NCM）的存储失效机制进行了全面分析，这是一个很少被回顾的话题。它深入研究了储存过程中发生的微观结构变化和性能退化，强调了环境因素对NCM材料的影响，包括表面杂质的形成和结构退化。此外，本文还讨论了各种增强策略，如表面涂层、掺杂和气体处理，旨在提高存储稳定性。此外，本文总结了目前多晶材料研究的成果，并提出了未来的研究方向，旨在提高SC-NCM的空气稳定性，这对提高lib的安全性和耐久性至关重要。关键的科学家

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chinese Journal of Chemistry 化学-化学综合

CiteScore

8.80

自引率

14.80%

发文量

422

审稿时长

1.7 months

期刊介绍： The Chinese Journal of Chemistry is an international forum for peer-reviewed original research results in all fields of chemistry. Founded in 1983 under the name Acta Chimica Sinica English Edition and renamed in 1990 as Chinese Journal of Chemistry, the journal publishes a stimulating mixture of Accounts, Full Papers, Notes and Communications in English.