The development of new high-performance materials is essential for robust electrochemical energy storage (EES). In recent years, ammonium salt materials, as an emerging class of layered materials, have attracted considerable attention as electrode materials for EES due to their abundant resources, simple synthesis, low cost, and high specific capacity. This review aims to comprehensively summarize the recent progress of ammonium salt materials for EES. Firstly, the crystal structures and preparation methods of typical ammonium salts including ammonium vanadate, ammonium metal phosphate, and ammonium metal molybdate are discussed. Subsequently, their application for supercapacitors (SCs) and various metal-ion batteries including monovalent alkali ion (Li⁺, Na⁺, and K⁺), ammonium ion (NH₄⁺) batteries, zinc ion (Zn²⁺) batteries, and multivalent alkali-earth ion (Mg²⁺ and Ca²⁺) batteries is thoroughly introduced. Likewise, the structure–activity relationships between the layered structure of ammonium salts and their electrochemical performance are clarified. In particular, diverse modification strategies including composites, defect, and doping engineering for ammonium salt materials as electrode materials for Zn-ion batteries are presented. Thereafter, various advanced characterization techniques together with theoretical calculations are expounded to further explain the internal structure evolution and reaction mechanism of ammonium salt materials for EES. Finally, a short conclusion and outlook, along with the current challenges and future opportunities of ammonium salts for EES, are proposed.

新型高性能材料的开发对于稳健的电化学储能 (EES) 至关重要。近年来，铵盐材料作为一类新兴的层状材料，以其资源丰富、合成简单、成本低廉、比容量高等优点，作为EES的电极材料备受关注。本综述旨在全面总结EES用铵盐材料的最新进展。首先，讨论了钒酸铵、金属磷酸铵和金属钼酸铵等典型铵盐的晶体结构和制备方法。随后，它们在超级电容器（SCs）和各种金属离子电池中的应用，包括单价碱离子（Li ⁺、Na ⁺和 K ⁺)、铵离子(NH ₄ ⁺ )电池、锌离子(Zn ²⁺ )电池和多价碱土离子(Mg ²⁺和Ca ²⁺) 电池被彻底介绍。同样，阐明了铵盐的层状结构与其电化学性能之间的构效关系。特别是提出了多种改性策略，包括铵盐材料作为锌离子电池电极材料的复合材料、缺陷和掺杂工程。此后，阐述了各种先进的表征技术以及理论计算，以进一步解释EES用铵盐材料的内部结构演变和反应机理。最后，提出了一个简短的结论和展望，以及用于 EES 的铵盐的当前挑战和未来机遇。