Stabilizing a Zn Anode by an Ionic Amphiphilic Copolymer Electrolyte Additive for Long-Life Aqueous Zn-Ion Batteries

The rampant growth of zinc dendrites and severe uncontrollable reactions have largely limited the industrialization aqueous Zn-ion batteries. Electrolyte additive engineering was found to be a facile yet effective strategy in addressing these issues; however, traditional organic small molecule additives raise additional safety health risks thus compromise intrinsic advantage In this study, we report polyacrylonitrile-co-poly(2-acrylamido-2-methylpropanesulfonic acid) (PAN-co-PAMPS) copolymer with ionic hydrophilicity PAMPS non-ionic PAN, which acts as an electrolyte regulate Zn deposition is designed meet water solubility. Moreover, reacts anode surface, chemically peels leaves pre-polished removes heterogeneity impurity metal surface. All effects are beneficial for homogeneous ion long-life battery. PAN segments act water-shielding layer on prevent its direct contact H2O. Consequently, Zn|Zn symmetric cells additive-containing electrolytes much longer life than those without (up eight times) at current density 1 mA cm−2 capacity h cm−2. assembled Zn|Cu Zn|V2O5 full batteries also display prominent electrochemical reversibility. reactively acidic amphiphilic polymer provides not only alternative design multi-functional additives, but constitutes easy-to-operate way advancing commercialization zinc-storage devices.