Abstract

The next generation energy storage systems endeavor to implement solid electrolytes for safety reasons, enhancing cycle life and thermal stability of a battery. One of the most promising solid electrolytes is NASICON structured ceramic material with composition of Li1.3Al0.3Ti1.7(PO4)3, which is stable towards air and moisture. However, NASICON-type electrolyte containing titanium metal suffers from reduction while contacting with Li metal. Reduction of Ti4+ to Ti3+ leads formation of the secondary phase that hinders lithium ion conduction between the solid electrolyte and electrode. By all means, this could be resolved by applying thin composite gel polymer electrolyte (GPE) as artificial buffer layer using layer by layer (LbL) technique. Despite preventing the side reaction, the coated layer improves interfacial contact between two solid phases. The structure and morphology of the solid electrolytes were confirmed by XRD, SEM images. The effect of polymer coating was observed via several electrochemical examinations. Acknowledgement This research was supported by the research grant #OPFE2021001 "New materials and devices for defense and aerospace applications" from MDDIAI Republic of Kazakhstan.

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