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Tailoring the Solvation Sheath of Cations by Constructing Electrode Front

Solvent molecules within the solvation sheath of cations (e.g., Li+, Na+, Zn2+) are easily to be dehydrogenated especially when coupled with high-voltage cathodes, and lead to detrimental electrolytes decompositions which finally accelerate capacity decays of rechargeable batteries. Tremendous efforts are devoted to tackle with this long-lasting issue. Among them, salt-concentrated strategies are frequently employed to tailor the solvation sheath of cations and improve the stabilities of electrolytes. However, the cost challenges caused by adding extra dose of expensive salts, additives/cosolvents in preparing highly concentrated electrolytes, hinder their further utilizations to some extent. Introducing porous materials-based electrode front-faces on the surface of electrodes even within dilute electrolytes can transfer the high-energy-state desolvated solvents from the reactive electrodes to the nonconductive porous material surfaces, thus eliminate the contact chances between desolvated solvents and electrode materials, and greatly reduce solvents-related decomposition issues. Herein, recent advances in using electrode front-faces to tailor the solvation sheath of metal ions for rechargeable batteries are discussed. Finally, perspectives to the future challenges and opportunities of constructing electrode front-faces to tailor the solvation sheath of cations by constructing electrode front-face for rechargeable batteries are provided.

中文翻译:

通过构建可充电电池的电极正面来调整阳离子的溶剂化鞘

阳离子溶剂化鞘内的溶剂分子(例如,Li +、Na +、Zn 2+) 很容易脱氢,尤其是在与高压阴极结合时,会导致有害的电解质分解,最终加速可充电电池的容量衰减。为解决这个长期存在的问题付出了巨大的努力。其中,盐浓度策略经常被用来定制阳离子的溶剂化鞘层并提高电解质的稳定性。然而,在制备高浓度电解质时添加额外剂量的昂贵盐、添加剂/助溶剂所带来的成本挑战,在一定程度上阻碍了它们的进一步利用。即使在稀电解质中,在电极表面引入基于多孔材料的电极正面也可以将高能态去溶剂化溶剂从反应电极转移到非导电多孔材料表面,从而消除去溶剂化溶剂与电极材料之间的接触机会,并大大减少与溶剂相关的分解问题。

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