Decoupling, quantifying, and restoring aging-induced Zn-anode losses in rechargeable aqueous zinc batteries

Rechargeable aqueous zinc batteries offer low cost, safety, and good cycling capacity, largely due to the water-compatible Zn-metal anode. However, Zn anodes corrode in aqueous electrolytes. While such corrosion is well known, distinguishing the relative importance of corrosion contributions toward anode capacity loss remains less understood. Here, by systematically cycling Zn anodes with controlled loading and under different aging conditions, we successfully decouple and quantify the aging-induced contributions toward anode degradation in mildly acidic aqueous electrolytes. While some losses occur due to the irreversible consumption of Zn into corrosion by-products, we demonstrate that the bigger contributor…

• HR
  Henry Royce Institute

  Awards: EP/R010145/1, EP/R010145, EP/L019469/1
• RS
  Royal Society

  Award: UF160183
• EA
  Engineering and Physical Sciences Research Council

  Awards: EP/L019469/1, EP/R010145/1, EP/R010145/1, M009521, EP/R00661X/1, M009521/1, EP/M02833X/1, EP/M009521/1, EP/M009521, EP/M009521/1, EP/L019469, EP/M02833X/1, EP/X527257/1, EP/R010145, EP/L019469/1, EP/N010868/1