Research Progress of Polymers for Zinc-Ion Batteries
Water zinc-ion batteries with high volume energy density,high theoretical capacity,low reduction potential and high abundance zinc as anode have attracted more and more attention due to their safety and environmental protection.However,the interface between zinc anode and electrolyte is prone to produce zinc-dendrite deposition.Besides,the related side reactions caused by free water/oxygen[hydrogen evolution reaction(HER),corrosion and passivation],the volume expansion of the cathode,and the dissolution of the active substance hinder the commercial applications of zinc-ion batteries.Polymers with excellent chemical stability,adjustable structures,high energy density,excellent mechanical properties,and structural flexibility have great application prospects in zinc-ion batteries.In this paper,the recent polymer applications in zinc-ion batteries were reviewed,and the research progresses in optimizing the electrode,separator,electrolyte and interface were summarized,providing references for improving the performances of polymer-based zinc-ion batteries.
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