Lithium Difluorophosphate as a Widely Applicable Additive to Boost Lithium-Ion Batteries: a Perspective,Advanced Functional Materials

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Lithium Difluorophosphate as a Widely Applicable Additive to Boost Lithium-Ion Batteries: a Perspective
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-01-17 , DOI: 10.1002/adfm.202211958
Aiping Wang ₁ , Li Wang ₁ , Hongmei Liang ₁ , Youzhi Song ₁ , Yufang He ₁ , Yanzhou Wu ₁ , Dongsheng Ren ₁ , Bo Zhang ₁ , Xiangming He ₁

Affiliation

Lithium difluorophosphate (LiDFP) is among the most widely applicable additives used to construct a robust solid electrolyte interphase (SEI) on electrode, which can improve the cycling performance and rate performance of high-voltage cathodes and Li metal anodes at extreme temperatures. Regarding the working mechanism of LiDFP, reasonable but divided understandings have been proposed based on specific battery chemistry. Herein, the broad applications of LiDFP in various electrochemical systems are reviewed and a universal working mechanism based on the state-of-the-art understanding of LiDFP is offered. Then, future directions of the missing part in mechanism comprehension are highlighted. Furthermore, the approaches to effectively apply LiDFP and other similar additives according to their limits are summarized. Finally, questions regarding the missing part of the mechanism are discussed by which LiDFP forms a robust SEI and how these lead to opportunities for future understanding and promotion of interfacial passivation. This study not only provides new knowledge on the mechanism of LiDFP and other existing additives but also helps inspire more effective additive applications.

中文翻译：

二氟磷酸锂作为一种广泛适用的添加剂来提升锂离子电池：一个观点

二氟磷酸锂（LiDFP）是应用最广泛的添加剂之一，用于在电极上构建坚固的固体电解质界面（SEI），可以提高高压正极和锂金属负极在极端温度下的循环性能和倍率性能。关于 LiDFP 的工作机制，基于特定的电池化学性质提出了合理但分歧的理解。在此，回顾了 LiDFP 在各种电化学系统中的广泛应用，并提供了一种基于对 LiDFP 的最新理解的通用工作机制。然后，突出了机制理解中缺失部分的未来方向。此外，总结了根据其限制有效应用 LiDFP 和其他类似添加剂的方法。最后，讨论了有关机制缺失部分的问题，LiDFP 形成了强大的 SEI，以及这些机制如何为未来理解和促进界面钝化提供机会。这项研究不仅提供了有关 LiDFP 和其他现有添加剂机理的新知识，而且有助于激发更有效的添加剂应用。

更新日期：2023-01-17

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