Deep eutectic solvents (DESs), renowned for their cost-effectiveness and eco-friendliness, have attracted widespread attention in the field of energy storage, especially for lithium-ion batteries (LIBs). By virtue of its environmental adaptability, superior safety, and effortless production with low cost, it provides the possibility to alleviate the notorious safety issues associated with LIBs, as well as the environmental problems caused by the high toxicity of electrolytes. Given that, it is massively argued that cost-effective DESs may serve as a feasible substitute for ionic liquids in the formulation of electrolytes and electrodes for LIBs. Therefore, despite the fact that the relevant research is still in its infancy, there has been a proliferation of studies on the application of DESs to LIBs in recent years. However, the drawbacks of DESs, such as the high viscosity, pull down the upper limit of their electrochemical performance, limiting the potential for large-scale application as well as troubling the research of relevant scholars. Thereupon, a thorough and critical review of the recent progress in applying DESs for LIBs is essential for advancing this emerging research field. This paper, therefore, investigates the transport mechanism of Li in liquid electrolytes of DESs, provides insights into the interfacial challenges in solid electrolytes of DESs, focuses on the role of DESs in electrode synthesis, and compares the electrochemical performance of DESs with that of ionic liquids (ILs). Finally, this paper discusses the challenges faced by the application of DESs in LIBs, and proposes possible future directions, such as the development of novel DESs systems and the modulation of the interrelationships between the components and electrochemical properties of existing DESs systems, hoping to provide guidance for the relevant studies in the promotion and development of DESs in LIBs.

中文翻译：

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下一代锂电池深度共晶溶剂的最新进展：更安全、更环保


低共熔溶剂（DES）以其成本效益和环境友好性而闻名，在能源存储领域，特别是锂离子电池（LIB）领域引起了广泛关注。凭借其环境适应性、卓越的安全性以及低成本的轻松生产，它为缓解与锂离子电池相关的臭名昭著的安全问题以及电解质高毒性引起的环境问题提供了可能。鉴于此，人们普遍认为，具有成本效益的 DES 可以作为锂离子电池电解质和电极配方中离子液体的可行替代品。因此，尽管相关研究仍处于起步阶段，但近年来有关 DES 在 LIB 中应用的研究却不断增多。然而，DESs的高粘度等缺点拉低了其电化学性能的上限，限制了大规模应用的潜力，也困扰了相关学者的研究。因此，对 DES 在 LIB 中的应用的最新进展进行彻底和批判性的回顾对于推进这一新兴研究领域至关重要。因此，本文研究了 DES 液体电解质中 Li 的传输机制，深入了解 DES 固体电解质中的界面挑战，重点讨论 DES 在电极合成中的作用，并将 DES 的电化学性能与离子电解质的电化学性能进行比较。液体 (IL)。 最后，本文讨论了DESs在LIB中应用所面临的挑战，并提出了未来可能的方向，例如新型DESs系统的开发以及现有DESs系统的组件和电化学性能之间的相互关系的调制，希望提供为LIB中DES的推广和发展的相关研究提供指导。