Metal-air battery cathode and its preparation method, metal-air battery

The invention provides a metal-air battery cathode. The metal-air battery cathode comprises a metal current collector, a lyophobic layer compounded at one side of the metal current collector, and a catalyst layer compounded on the lyophobic layer. The catalyst layer comprises fiber nickel. The metal-air battery cathode provided by the invention is added with the fiber nickel as conductive filling agent, so that the crack and dropping caused by volume expansion and shrinkage of different materials of the cathode during the preparation process are effectively released. 本发明提供了种金属空气电池阴极，包括金属集流体，复合在所述金属集流体侧的疏水层；复合在所述疏水层上的催化剂层；所述催化剂层中包括纤维镍。本发明提供的金属空气电池阴极中，添加了纤维镍作为导电填充剂，有效的缓解阴极在制备过程中不同材料的体积膨胀收缩所导致的开裂和脱落。