Aqueous Zinc‐Ion Batteries with Boosted Stability and Kinetics under a Wide Temperature Range

Abstract Sustainable aqueous zinc ion batteries (AZIBs) necessitate a wide operational temperature range to ensure practicability, yet achieving this often compromises either reaction kinetics at low temperatures or cycling stability at high temperatures. Here we present an electrolyte design that balances this trade‐off, enhancing the stability and kinetics of AZIBs across −60 to 60 °C. Our approach incorporates silk fibroin as a multifunctional additive into ZnCl 2 ‐based “water‐in‐salt” electrolyte, which modifies both electrolyte structure and electrode interphase. Specifically, Zn||Zn half‐cells with this electrolyte realize low hysteresis (180 mV at 1 mA cm −2 ) at −60 °C, and stable operation (200 hours…

• NN
  National Natural Science Foundation of China

  Award: 22379041
• NS
  Natural Science Foundation of Chongqing

  Award: CSTB2024NSCQ-MSX1161
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Award: 2024A1515010643