Anionic Redox Chemistry in Polysulfide Electrode Materials for Rechargeable Batteries,ChemSusChem

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Anionic Redox Chemistry in Polysulfide Electrode Materials for Rechargeable Batteries
ChemSusChem ( IF 7.5 ) Pub Date : 2017-11-22 , DOI: 10.1002/cssc.201701709
Ekaterina D. Grayfer ₁ , Egor M. Pazhetnov ₁ , Mariia N. Kozlova ₁ , Sofya B. Artemkina ₁ , Vladimir E. Fedorov _{1,

2}

Affiliation

Classical Li‐ion battery technology is based on the insertion of lithium ions into cathode materials involving metal (cationic) redox reactions. However, this vision is now being reconsidered, as many new‐generation electrode materials with enhanced reversible capacities operate through combined cationic and anionic (non‐metal) reversible redox processes or even exclusively through anionic redox transformations. Anionic participation in the redox reactions is observed in materials with more pronounced covalency, which is less typical for oxides, but quite common for phosphides or chalcogenides. In this Concept, we would like to draw the reader's attention to this new idea, especially, as it applies to transition‐metal polychalcogenides, such as FeS₂, VS₄, TiS₃, NbS₃, TiS₄, MoS₃, etc., in which the key role is played by the (S−S)²⁻/2 S²⁻ redox reaction. The exploration and better understanding of the anion‐driven chemistry is important for designing advanced materials for battery and other energy‐related applications.

中文翻译：

可充电电池的多硫化物电极材料中的阴离子氧化还原化学

经典的锂离子电池技术基于将锂离子插入涉及金属（阳离子）氧化还原反应的阴极材料中。但是，现在正在重新考虑这一愿景，因为许多具有可逆容量增强的新一代电极材料都是通过组合的阳离子和阴离子（非金属）可逆氧化还原工艺甚至仅通过阴离子氧化还原转化来运行的。在具有较明显共价性的材料中观察到阴离子参与氧化还原反应，这对于氧化物而言较不常见，但对于磷化物或硫属元素化物则很常见。在这个概念中，我们想引起读者的注意，这个新想法尤其适用于过渡金属多硫属元素化物，例如FeS ₂，VS ₄，TiS ₃，NbS ₃，TiS ₄，MoS ₃等，其中关键作用是由（SS ）^2- / 2 S ^2-氧化还原反应。对阴离子驱动化学的探索和更好的理解对于设计用于电池和其他能源相关应用的高级材料非常重要。

更新日期：2017-11-22

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