Bi-functional composite electrocatalysts consisting of nanoscale (La, Ca) oxides and carbon nanotubes for long-term zinc–air fuel cells and rechargeable batteries

Here, we report a new nanocomposite based on (La, Ca) oxides, which exhibits superior bi-functional activity and durability in a zinc–air battery with an everlasting discharge peak power density achieving long life (750 cycles). This work opens a new avenue for the design/fabrication of durable bi-functional electrocatalysts for scaleable applications in zinc–air batteries.