Water-Stable High Lithium-Ion Conducting Solid Electrolyte of Li1.4Al0.4Ge0.2Ti1.4(PO4)3-LiCl for Aqueous Lithium-Air Batteries
Water-Stable High Lithium-Ion Conducting Solid Electrolyte of Li1.4Al0.4Ge0.2Ti1.4(PO4)3-LiCl for Aqueous Lithium-Air Batteries
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DOI：
10.3389/fenrg.2020.00187
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发表时间：
2020-08-07
影响因子：
3.4
通讯作者：
Imanishi, Nobuyuki
中科院分区：
文献类型：
--
作者：
Bai, Fan;Kakimoto, Kouichi;Imanishi, Nobuyuki
水溶液锂空气电池具有能量密度高、功率密度大等优点，是最有前途的电动汽车用电池之一。该电池系统由锂阳极和水溶液阴极电解液组成，它们被水稳定的锂离子传导固体电解质和空气电极分开。该系统的理论能量密度为1，910 W h kg（-1），比传统锂离子电池高出约5倍。该系统的一个关键组成部分是水稳定的锂离子传导固体电解质。在本工作中，我们通过向流延成型的NASICON型Li-1.Al-4（0）.Ge-4（0）.Ti-2（1）中加入环氧树脂和LiCl，开发了一种水稳定且不透水的固体电解质，其室温下的锂离子电导率约为10（-3）S cm（-1）。（4）（PO_4）（3）薄膜。具有固体电解质隔膜的水性锂-空气电池在空气气氛中在0.5mA cm（-2）和25 ° C下成功地循环。
Aqueous lithium-air batteries are one of the most promising batteries for electric vehicles because of its high energy and power density. The battery system consists of a lithium anode and an aqueous solution catholyte, which are separated by a water-stable lithium-ion-conducting solid electrolyte, and an air electrode. The theoretical energy density of this system is 1,910 W h kg(-1), which is around five times higher than that of conventional lithium-ion batteries. A key component of this system is the water-stable lithium-ion-conducting solid electrolyte. In this work, we have developed a water-stable and water-impermeable solid electrolyte with a high lithium-ion conductivity of around 10(-3)S cm(-1)at room temperature by the addition of epoxy resin and LiCl into a tape-cast NASICON-type Li-1.Al-4(0).Ge-4(0).Ti-2(1).(4)(PO4)(3)film. The aqueous lithium-air battery with the solid electrolyte separator was successfully cycled at 0.5 mA cm(-2)and 25 degrees C in an air atmosphere.