As a new member in high-entropy materials family developed after high-entropy alloys, high-entropy compounds (HECs) are of particular interest owing to the combination of superiorities from high entropy and cocktail effects. The discovery of HECs indeed opens up a new frontier in the field of energy storage and conversion. This article provides a comprehensive review of the new frontiers on HECs for energy-related application. It begins with the fundamentals of HECs, with an emphasis on thermodynamic and structural features, and characterizations of HECs. Discussion is then made on the synthetic strategies of component optimization and structure engineering for the developing various HECs. Thereafter, the application of HECs particularly in electrodes for rechargeable batteries and supercapacitors, electrolytes for batteries, electrocatalytic hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), carbon dioxide reduction reaction (CORR) are highlighted. Finally, this review is concluded with an outlook of future research on HECs, major challenges to be addressed and possible solutions.

中文翻译：

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用于电化学能量存储和转换的新兴高熵化合物


作为继高熵合金之后发展起来的高熵材料家族的新成员，高熵化合物（HEC）由于结合了高熵效应和鸡尾酒效应的优点而受到特别关注。 HEC的发现确实开辟了能量存储和转换领域的新领域。本文对 HEC 能源相关应用的新领域进行了全面回顾。它从 HEC 的基础知识开始，重点介绍 HEC 的热力学和结构特征以及表征。然后讨论了开发各种HEC的成分优化和结构工程的综合策略。此后，HEC的应用特别是在可充电电池和超级电容器的电极、电池​​电解质、电催化析氢反应（HER）、析氧反应（OER）、氧还原反应（ORR）、二氧化碳还原反应（CORR）方面的应用受到关注。最后，本文总结了 HEC 的未来研究展望、需要解决的主要挑战和可能的解决方案。