Realizing multielectron reactions in electrodes is crucial for improving the capacity and energy density of batteries. Polyanion‐type compounds are suitable for exploring multielectron reactions due to their robust frameworks and structural diversity. This paper reviews the recent research progress on the study of multielectron reactions in Na‐based polyanion compounds. The versatile polyanions are classified by transition metals (V, Mn, Fe, Ti, Cr, and Co). Both experimental efforts and theoretical calculations are analyzed and summarized, with a special focus on the reversibility, stability, and corresponding structural evolutions during the multielectron reactions. The challenges and opportunities of exploring polyanions with reversible and stable multielectron reactions are also discussed.

中文翻译：

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钠离子电池用聚阴离子材料中的多电子反应研究进展

在电极中实现多电子反应对于提高电池的容量和能量密度至关重要。聚阴离子型化合物由于其坚固的框架和结构的多样性而适合于探索多电子反应。本文综述了钠基聚阴离子化合物中多电子反应研究的最新研究进展。多功能聚阴离子按过渡金属（V，Mn，Fe，Ti，Cr和Co）分类。分析和总结了实验工作和理论计算，特别着重于多电子反应过程中的可逆性，稳定性和相应的结构演变。还讨论了利用可逆和稳定的多电子反应探索聚阴离子的挑战和机遇。