The field of rechargeable batteries has witnessed significant advancements driven by the increasing demand for efficient and sustainable energy technologies. As a key component of rechargeable battery systems, electrolytes play a crucial role in determining the battery reversibility and stability. Nevertheless, the unsatisfactory ion conductivity and limited low-temperature behaviors of prevailing electrolytes greatly hinder the battery application scenarios. High-entropy electrolytes (HEEs) have attracted extensive attention due to their potential to solve the above issues. However, the ambiguous concept of HEEs, the lack of guidance for electrolyte component screening and optimization, and the unclear impact of HEEs on the electrode|electrolyte interface seriously impede the practical viability of HEEs. Herein, for the first time, we present a survey of emerging HEEs, spanning from design principles to performance optimization. We summarize the ion-transport mechanisms and fundamental properties of various classes of HEEs, including liquid, quasi-solid and all-solid HEEs, and review the recent advances in rechargeable alkali metal (e.g., Li and Na)-based battery and multivalent-ion (e.g., Mg and Zn) battery systems in which their performances can be intrinsically enhanced by HEEs. In particular, the interaction between the high-entropy solvation/crystal structure and battery performance is highlighted. Finally, we point out the main challenges encountered in developing batteries coupled with HEEs and provide a perspective for future breakthroughs.

中文翻译：

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越多越好：可充电电池中的高熵电解质设计

由于对高效和可持续能源技术的需求不断增长，可充电电池领域取得了显着进步。电解质作为充电电池系统的关键组成部分，在决定电池的可逆性和稳定性方面发挥着至关重要的作用。然而，主流电解质的离子电导率不理想和低温行为有限，极大地阻碍了电池的应用场景。高熵电解质（HEE）因其解决上述问题的潜力而受到广泛关注。然而，HEEs概念的模糊性、电解质成分筛选和优化指导的缺乏以及HEEs对电极/电解质界面影响的不明确严重阻碍了HEEs的实际可行性。在此，我们首次对新兴 HEE 进行了调查，涵盖从设计原理到性能优化的各个方面。我们总结了各类 HEE（包括液体、准固体和全固体 HEE）的离子传输机制和基本性质，并回顾了可充电碱金属（例如Li 和 Na）基电池和多价 HEE 的最新进展。离子（例如镁和锌）电池系统，其性能可以通过 HEE 本质上增强。特别强调了高熵溶剂化/晶体结构与电池性能之间的相互作用。最后，我们指出了开发与 HEE 结合的电池时遇到的主要挑战，并为未来的突破提供了前景。