Polysaccharide-based hydrogels and additives in electrolyte engineering for Zn-ion batteries: anode stabilization mechanisms, performance enhancement, and perspectives

This review summarizes several representative polysaccharides, including cellulose, chitosan, alginates, and cyclodextrins, as electrolyte components for Zn-ion batteries, with a focus on their applications in hydrogel electrolytes and as additives.