Abstract Custom-made porous and non-porous micrometer-sized glass platelets made of phase-separating sodium borosilicate glass are used as a new type of separator for lithium-ion batteries with liquid electrolytes as a high-temperature stable alternative for polymer-based separators. The production process of glass platelets as well as the preparation of porous glass platelets by the so-called VYCOR ® -process is described. The influence of the platelet morphology on the ionic conductivity in a non-aqueous battery electrolyte is shown. Porous glass platelets with a porosity of 52% show an ionic conductivity of 5.5 mS cm −1 in a standard non-aqueous lithium-ion battery electrolyte. The battery performance of porous and non-porous glass platelets as a separator is tested in a graphite/lithium iron phosphate full-cell configuration and is compared to state-of-the-art polymer-based separators. Charge/discharge tests are performed at different current rates. The results clearly show that glass platelets perform excellently with high charge/discharge currents up to a 10 C rate and capacity retention at a 1 C rate compared to polymer based separators.

中文翻译：

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作为锂离子电池隔膜的多孔和无孔微米级玻璃片

摘要 由相分离硼硅酸钠玻璃制成的定制多孔和无孔微米级玻璃片被用作新型液体电解质锂离子电池隔膜，作为聚合物基隔膜的高温稳定替代品。 . 描述了玻璃片的生产过程以及通过所谓的 VYCOR ® 工艺制备多孔玻璃片。显示了薄片形态对非水电池电解质中离子电导率的影响。孔隙率为 52% 的多孔玻璃片在标准非水锂离子电池电解质中显示出 5.5 mS cm -1 的离子电导率。在石墨/磷酸铁锂全电池配置中测试多孔和无孔玻璃片作为隔膜的电池性能，并与最先进的聚合物隔膜进行比较。充电/放电测试在不同的电流速率下进行。结果清楚地表明，与基于聚合物的隔膜相比，玻璃片在高达 10 C 倍率的高充电/放电电流和 1 C 倍率下的容量保持率下表现出色。