Research on next‐generation battery technologies (beyond Li‐ion batteries, or LIBs) has been accelerating over the past few years. A key challenge for these emerging batteries has been the lack of suitable electrode materials, which severely limits their further developments. MXenes, a new class of 2D transition metal carbides, carbonitrides, and nitrides, are proposed as electrode materials for these emerging batteries due to several desirable attributes. These attributes include large and tunable interlayer spaces, excellent hydrophilicity, extraordinary conductivity, compositional diversity, and abundant surface chemistries, making MXenes promising not only as electrode materials but also as other components in the cells of emerging batteries. Herein, an overview and assessment of the utilization of MXenes in rechargeable batteries beyond LIBs, including alkali‐ion (e.g., Na⁺, K⁺) storage, multivalent‐ion (e.g., Mg²⁺, Zn²⁺, and Al³⁺) storage, and metal batteries are presented. In particular, the synthetic strategies and properties of MXenes that enable MXenes to play various roles as electrodes, metal anode protective layers, sulfur hosts, separator modification layers, and conductive additives in these emerging batteries are discussed. Moreover, a perspective on promising future research directions on MXenes and MXene‐based materials, ranging from material design and processing, fundamental understanding of the reaction mechanisms, to device performance optimization strategies is provided.

中文翻译：

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超越锂离子电池的MXene

在过去的几年中，对下一代电池技术（锂离子电池或LIB除外）的研究一直在加速。这些新兴电池的主要挑战是缺乏合适的电极材料，这严重限制了它们的进一步发展。MXenes是一类新型的2D过渡金属碳化物，碳氮化物和氮化物，由于一些理想的特性，被提议作为这些新兴电池的电极材料。这些属性包括大而可调的夹层空间，出色的亲水性，出色的导电性，组成多样性以及丰富的表面化学性质，使得MXenes不仅有望作为电极材料而且有望作为新兴电池的电池中的其他组件。在此，概述和评估了LIB以外的可充电电池中MXene的使用情况，^介绍了+，K ⁺）存储，多价离子（例如Mg 2 ⁺，Zn ²⁺和Al ³⁺）存储以及金属电池。特别是，讨论了使MXene发挥各种作用的MXene的合成策略和特性，这些MXene充当了这些新兴电池中的电极，金属阳极保护层，硫主体，隔板改性层和导电添加剂。此外，还提供了有关MXene和基于MXene的材料的有前途的未来研究方向的观点，包括材料设计和处理，对反应机理的基本理解以及设备性能优化策略。