Shape-Controlled Synthesis of Nitrogen-Doped Carbon Encapsulated CoSn Intermetallic Electrocatalyst for Neutral and Alkaline Zinc–Air Batteries

in neutral electrolyte. Furthermore, the device shows excellent charge-discharge cycling stability for >99 h in alkaline and 270 h in neutral media, with negligible voltage decay, highlighting the robust bifunctional activity of the catalyst in both environments. The ordered structure and the graphitic carbon encapsulation of the intermetallic contribute to its enhanced activity and durability.