Abstract
In order to improve the safety and environmental friendliness of electrolytes, it is necessary to enhance the ionic conductivity of polyvinyl alcohol (PVA) hydrogel electrolytes. Herein, we present a method for the preparation of PVA hydrogels using electron beam irradiation, and based on this method, a high strength PVA hydrogel with breaking strength of 78 kPa was obtained. It was combined with room-temperature inorganic hydrated molten salt (RTMS) to prepare RTMS-PVA hydrogel electrolytes with a maximum ionic conductivity of 70.6 mS cm−1, and the assembled NaCoHCF/AC aqueous ion battery at 1C The capacity retention after 100 cycles was 98%, achieving a highly stable PVA hydrogel with high ionic conductivity. This protocol is not only cost-effective in terms of raw materials and synthetic routes, simple to operate, and nontoxic, but also provides an avenue to realize large-scale industrial production.
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