膜科学与技术

气溶胶打印凝胶电解质膜及在柔性铝空气电池中的应用

作者：吴晓斌，于影，陈洪立，左雨欣，左春柽

单位： 1.浙江理工大学机械与自动控制学院，杭州 310018； 2.嘉兴学院信息科学与工程学院，嘉兴 314000； 3.嘉兴南湖学院，嘉兴 314000

关键词：凝胶电解质膜；铝空气电池；气溶胶打印；功率密度；离子电导率

出版年,卷(期):页码： 2023,43(1):109-115

摘要：

将氢氧化钾-聚乙烯醇-丙三醇(KOH-PVA-Gl)溶液作为打印墨水，基于气溶胶打印制备厚度可控的凝胶电解质膜。采用XRD、SEM、EIS等方法，对凝胶电解质膜进行表征和测试。将凝胶电解质膜组装成柔性铝空气电池，测试其电化学性能，并探究凝胶电解质膜厚度及KOH浓度对于电池性能的影响。结果表明，气溶胶打印的凝胶电解质膜厚度可控，10层打印的电解质膜厚度仅为18.4 μm。在3 mA/cm2的放电电流密度下，由18.4 μm厚凝胶电解质膜组装的铝空气电池组峰值功率密度达8.22 mW/cm2。KOH质量分数为15%的凝胶电解质膜离子电导率可达2.44×10-2 S/cm，其组装的铝空气电池放电时长比质量分数5% KOH电解质的电池提升了约124%。

Abstract: In this paper, potassium hydroxide, polyvinyl alcohol, and glycerin (KOH-PVA-GL) solution were used as printing ink to prepare gel electrolyte membrane with controllable thickness by aerosol jet printing. The gel electrolyte membrane was characterized and tested by XRD, SEM, EIS, and other experiments. The gel electrolyte membrane was assembled with a flexible Al-air battery to test its electrochemical performance, and the influence of the thickness and the KOH concentration of the gel electrolyte membrane on battery performance was explored. The results showed that the gel electrolyte membrane thickness in aerosol jet printing was controllable, and the 10-layer printed electrolyte thickness was only 18.4 μm. At the discharge current density of 3 mA/cm2, the peak power density of the Al-air battery assembled with 18.4 μm gel electrolyte membrane reached 8.22 mW/cm2. The ionic conductivity of the ultra-thin gel electrolyte membrane with 15%KOH mass fraction reached 2.44×10-2 S/cm, and the discharge time of the Al-air battery assembled with the gel electrolyte membrane was about 124% longer than that of the battery with 5% KOH concentration electrolyte.

吴晓斌(1997-),男,浙江金华人，硕士研究生,主要研究方向为复合材料电解质薄膜的制备

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