Negative electrode material of potassium ion secondary battery, preparation method of negative electrode material, negative electrode plate and potassium ion secondary battery

The invention belongs to the field of battery materials, and discloses a preparation method of a negative electrode material of a potassium ion secondary battery, which comprises the following steps: adding a cobalt precursor, a molybdenum precursor and porous carbon into a solvent for mixing, and then dipping and drying under the assistance of an external field to obtain a solid substance A; 2) performing high-temperature pyrolysis treatment on the solid substance A to obtain cobalt-molybdenum double oxide nano-cluster modified porous carbon; the porous carbon is ordered mesoporous carbon or ordered graded pore carbon. The negative electrode material has high capacity, good rate capability and long cycle stability. The invention also provides a preparation method of the material, a negative plate and a potassium ion secondary battery. 本发明属于电池材料领域，公开了一种钾离子二次电池负极材料的制备方法，将钴前驱体、钼前驱体和多孔碳加入到溶剂中混合，然后在外场辅助下浸渍，干燥，得到固体物质A；2)将所述固体物质A进行高温热解处理，得到钴钼双氧化物纳米簇修饰多孔碳；所述多孔碳为有序介孔碳或有序分级孔碳。这种负极材料具有高容量、良好的倍率性能及长循环稳定性。同时还提供该材料的制备方法以及