NixCo9-xS8 embbeded in N,S co doped carbon matrix with Macroporous Inverse Opal structure as a highly efficient bifunctional electrocatalyst for OER, ORR

초록

Considerable research efforts have been devoted to various energy storage and conversion systems due to depletion of fossil fuels and environmental pollution. Especially. rechargeable Zinc-air batteries (ZABs) emerge as particularly promising solutions, characterized by their low cost, high theoretical energy density (1084 Wh kg?1), environmental friendliness, and inherent safety. Rechargeable Zinc-air batteries (ZABs) as leading contenders for the next generation of energy storage systems. Nevertheless, this regard still remains several persistent challenges due to the intrinsically sluggish kinetics and high overpotential of the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) at the air cathode. Traditionally, precious metal-based materials such as Pt/C and RuO2 is commonly regarded as the most efficient electrocatalyst for ORR, OER. However, it is well-recognized such commercial catalysts generally has been hampered by high-cost, long-term durability, scarcity. Therefore, Transition metal-based sulfide (TMS) materials are expected to replace novel-metal based catalyst owing to low cost, high physical properties, and superior electrochemical performance. compared with other chalcogenide species. Furthermore, Combining TMS with electrically conductive heteroatom doped porous carbon and ion doping have an effective strategy to enhance the OER and ORR performance.