Electrochemical hydrogen storage in zeolite template carbon and its application in a proton/potassium hybrid ion hydrogel battery coupling with nickel-zinc co-doped Prussian blue analogues

Abstract

Carbon-based materials have been demonstrated to possess great potential as effective candidates for electrochemical hydrogen storage. Here, Zeolite templated carbon (ZTC) was synthesized via an impregnation method, employing zeolite NaY as the template and furfuryl alcohol/propylene as the carbon precursor. The performance of ZTC in hydrogen storage applications within an alkaline electrolyte environment was systematically examined. Meantime, an aqueous hybrid ion battery is developed using ZTC as the anode material and nickel-zinc-based Prussian blue analogue (PBA)as the cathode material. The battery operates at a voltage of 1.5 V with a capacity of 52.5 mAh g⁻¹ and demonstrates excellent rate performance and cycle stability. Moreover, a polyvinyl alcohol hydrogel electrolyte was also applied to this battery. With the same electrode materials, the hydrogel battery exhibits a slightly lower capacity than that of the battery with an aqueous solution electrolyte. However, the cyclic stability of the hydrogel battery becomes more prominent as the operating period increases.