摘要
This work describes a bifunctional oxygen catalyst made of cobalt disulfide encapsulated in N,S codoped mesoporous carbon with a novel three-dimensional micro-nano crosslinking structure.The proposed composite materials exhibit promising oxygen electrocatalytic activity and stability.The composite assembled rechargeable zinc-air battery can achieve a high power density of 208.9 m W/cm^(2),and can be stably cycled for more than 160 h.Additionally,the all-solid zinc-air battery assembled with the electrocatalyst also performs admirably.The micro-nano crosslinking and high porosity structure,as well as the large number of active sites generated by the synergy of N,S doping and the close interface between carbon matrix and CoS_(2),contribute to the composite's exceptional electrochemical performance.This study's rational strategy lays the path for the development of other high-performance bifunctional electrocatalysts.
基金
supported by the National Natural Science Foundation of China(Nos.52104301,52171207,52072120)
the Scientific Research Fund of Hunan Provincial Education Department,China(Nos.21A0392,19A203,21B0591)
the Open-End Fund for Hubei Key Laboratory of Pollutant Analysis&Reuse Technology(Hubei Normal University)(No.PA190102)
the Guangxi Key Laboratory of Low Carbon Energy Material(No.2020GXKLLCEM03)。