Preparation method of CoNi/NC wave-absorbing material

The invention relates to a preparation method of a CoNi/NC wave-absorbing material, which comprises the following steps: dissolving nickel nitrate hexahydrate in distilled water to obtain a nickel nitrate solution, dropwise adding ammonia water until the solution is dark blue, then adding glycine, uniformly mixing, transferring to a reaction kettle, placing in an electrothermal blowing dry box, heating to 90-100 DEG C for reaction, cooling to room temperature after the reaction is finished, washing and filtering to obtain the CoNi/NC wave-absorbing material. The preparation method comprises the following steps: preparing Ni (OH) 2, drying to obtain Ni (OH) 2, adding the Ni (OH) 2 and 2-methylimidazole into methanol, stirring until the Ni (OH) 2 and the 2-methylimidazole are completely dissolved, then dropwise adding a methanol solution of cobalt nitrate hexahydrate under rapid stirring, after dropwise adding, uniformly stirring, standing and aging, then carrying out centrifugal separation, filtering, washing