Lithium-Ion Battery Separators for Ionic-Liquid Electrolytes: A Review.,Advanced Materials

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Lithium-Ion Battery Separators for Ionic-Liquid Electrolytes: A Review.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-01-20 , DOI: 10.1002/adma.201904205
Candice F J Francis _{1,

2,

3} , Ilias L Kyratzis ₃ , Adam S Best ₃

Affiliation

Ionic liquids (ILs) are widely studied as a safer alternative electrolyte for lithium-ion batteries. The properties of IL electrolytes compared to conventional electrolytes make them more thermally stable, but they also have poor wetting with commercial separators. In a lithium-ion battery, the electrolyte should completely wet out the separator and electrodes to reduce the cell internal resistance. Investigations of cell materials with IL electrolytes have shown that the wetting issues in IL-electrolyte cells are most likely due to poor separator compatibility, not electrode compatibility. A compatible separator must be developed before IL electrolytes can be used in commercial lithium-ion batteries. Herein, separators for IL electrolytes, including commercial and novel separators, are reviewed. Separators with different processing methods, polymers, additives, and different IL electrolytes are considered. Collated, the separator studies show a strong correlation between ionic conductivity and membrane porosity, even more than the electrolyte type. The challenge of a suitable separator for IL electrolytes is not solved yet. Herein, it is revealed that a separator for IL electrolytes will most likely require a combination of high thermal and mechanical stability polymer, ceramic additives, and an optimized manufacturing process.

中文翻译：

用于离子液体电解质的锂离子电池隔膜：综述。

离子液体（IL）被广泛研究为锂离子电池的一种更安全的替代电解质。与传统电解质相比，IL电解质的特性使其具有更高的热稳定性，但与商用隔膜相比，它们的润湿性也很差。在锂离子电池中，电解质应完全浸透隔膜和电极，以降低电池的内阻。用IL电解质对电池材料进行的研究表明，IL电解质电池中的润湿问题最可能是由于较差的隔板兼容性而不是电极兼容性引起的。IL电解质可用于商用锂离子电池之前，必须开发兼容的隔板。本文中，综述了用于IL电解质的隔板，包括商业隔板和新型隔板。具有不同加工方法的分离器考虑使用聚合物，添加剂和不同的IL电解质。整理后的隔板研究表明，离子电导率与膜孔隙率之间的相关性强，甚至比电解质类型强。尚未解决用于IL电解质的合适隔板的挑战。在此，揭示出用于IL电解质的隔膜最可能需要高热稳定性和机械稳定性的聚合物，陶瓷添加剂和优化的制造工艺的组合。

更新日期：2020-01-20

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