用于固态电池的独立式柔性石榴石-PVDF 陶瓷聚合物电解质膜,Energy & Fuels

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用于固态电池的独立式柔性石榴石-PVDF 陶瓷聚合物电解质膜
Energy & Fuels ( IF 5.2 ) Pub Date : 2023-01-24 , DOI: 10.1021/acs.energyfuels.2c03828
Sreejith O. V. ₁ , Sona Elsin Abraham ₁ , Murugan Ramaswamy ₁

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由于与基于液体电解质的电池相关的安全问题，固态电池近年来受到了相当大的关注。然而，大多数刚性固体电解质容易受到机械应变的影响，因此在商用电池中的实施需要进行适当的修改。聚合物型柔性膜可以克服尺寸和脆弱性。在此，我们提出了一种结合石榴石结构快速锂离子导体 (Li _6.28 Al _0.24 La ₃ Zr ₂ O ₁₂) 与聚偏二氟乙烯聚合物。采用 8:2 的石榴石与聚合物比例，通过流延法制造了一种独立的柔性陶瓷聚合物电解质。该膜表现出优异的电化学性能，具有良好的导电性和热电化学稳定性。一种简便的方法是将聚合物电解质浇铸在含有 5 wt% 石榴石材料的磷酸铁锂电极材料上，以增强电极与电解质的接触。该电池提供了非常显着的性能。这样，固态电解质的优势可以扩展到大规模生产具有更高安全性的固态电池。

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Free-Standing and Flexible Garnet-PVDF Ceramic Polymer Electrolyte Membranes for Solid-State Batteries

Solid-state batteries have been getting considerable attention in recent times due to the safety issues associated with liquid electrolyte-based batteries. However, most rigid solid electrolytes are vulnerable to mechanical strains, so implementation in a commercial battery needs proper modifications. Polymer-type flexible membranes could overcome the size and fragility. Herein, we propose a straightforward preparation of flexible and thin ceramic polymer electrolyte membranes combined with the advantage of garnet-structured fast lithium-ion conductors (Li_6.28Al_0.24La₃Zr₂O₁₂) with polyvinylidene fluoride polymers. An 8:2 ratio of garnet to polymer has been employed to create a free-standing flexible ceramic polymer electrolyte through tape casting. The membrane showed excellent electrochemical performance with good conductivity and thermal–electrochemical stability. A facile way of polymer electrolyte casting over lithium iron phosphate electrode material, which contains 5 wt % garnet material, has been adapted to enhance the electrode–electrolyte contact. The cell has offered significantly notable performance. This way, the benefit of solid-state electrolytes could extend to the large-scale production of solid-state batteries with extended safety.

更新日期：2023-01-24

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