FeNiCo-Codoped Nitrogen–Carbon as a Bifunctional Electrocatalytic Material for Zinc–Air Batteries

It is necessary to develop and design transition trimetallic materials as electrocatalysts to solve the energy shortage problem in current society. Therefore, to address this problem, this paper proposes the formation of Co–N/C by high-temperature carbonation of precursors, followed by adsorption and chelation of Fe and Ni metal ions onto chitosan and encapsulation in Co–N/C and then the formation of electrocatalysts with Fe and Ni modifications to Co–N/C (CoFeNi-N/C) by further pyrolysis. It is worth finding that the coupling between Co–N/C and Fe and Ni–N/C can improve the catalytic performance of CoFeNi-N/C, and the ORR half-wave potential of the prepared catalyst (CoFeNi-N/C) can reach up to 0.841 V, and the OER overpotential at 10 mA cm–2 is 340 mV as measured experimentally.