Abstract
Aqueous rechargeable lithium-air batteries are candidates for next-generation high energy and power density batteries. The key material of this type battery is the separator between the lithium anode and aqueous catholyte. Doped NASICON-type lithium conducting solid electrolytes of LiTi2(PO4)3 have potential application as the separator for aqueous lithium-air batteries because of their high lithium-ion conductivity and stability in water. In this study, water stable and water impermeable tape-cast films of Li1.4Al0.4Ge0.2Ti1.4(PO4)3-TiO2-LiCl•H2O-epoxy resin were prepared. The tape-cast film of Li1+0.4Al0.4Ge0.2Ti1.4(PO4)3–10 wt.% TiO2-3 wt.% LiCl•H2O-2 wt.% epoxy resin showed a three-point bending strength of 158 N mm−2 and a lithium-ion conductivity of 8.7 × 10−4 S cm−1 at 25 °C. The films were stable in a LiCl saturated aqueous solution and water impermeable.
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Kakimoto, K., Bai, F., Mori, D. et al. Water-stable high lithium-ion conducting Li1.4Al0.4Ge0.2Ti1.4(PO4)3-TiO2-LiCl•H2O–epoxy resin composite film with high mechanical strength as separator for Li-air batteries. J Solid State Electrochem 26, 1349–1357 (2022). https://doi.org/10.1007/s10008-022-05173-3
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DOI: https://doi.org/10.1007/s10008-022-05173-3