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Abstract Solid electrolytes have been regarded as the most promising electrolyte materials for the next generation of flexible electronic devices due to their excellent safety, wide operating temperature range, recycling convenient and etc. In order to explore a solid electrolyte with high ionic conductivity and excellent mechanical properties, Lithium lanthanum zirconium oxide (LLZO) as an inorganic active ceramics was compounded with modified poly (ionic liquid) to prepare a composite solid electrolyte with excellent performance. The structural differences between LLZO and the composite materials, the influence of LLZO's content on ionic conductivity, mechanical properties and compressive resistance of the composite solid electrolyte were investigated. The results revealed that: adding poly (ionic liquid) based binder not only endowed good flexibility for solid electrolytes, but also significantly improved the ion conductive efficiency of the electrolytes. When the content of LLTO in the composite solid electrolyte is 50%, the electrolyte obtained the highest ionic conductivity (1.45×10-4 S·cm-1) which is one order of magnitude higher than that of the pristine LLZO. If the compression resistance of composite solid electrolyte was characterized by the Vickell hardness, the hardness of the composite solid state electrolyte can reach 0.45 gf/μm2 at a LLZO content of 50%.
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Received: 07 May 2022
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2022, Vol. 35 
