A Zn@Sn powder anode for side reaction-resistant and stable aqueous zinc-ion batteries

Zn powder enables flexible and mass-tunable anodes, but suffers from dendrite growth and interfacial instability. Here, Sn nanoparticles are in situ anchored on Zn powder to suppress side reactions and promote uniform Zn deposition, enhancing reversibility and cycling stability in aqueous Zn-ion batteries.