Method for preparing hollow cobalt-nickel alloy/porous carbon composite wave-absorbing material

The present invention provides a method for preparing a hollow cobalt-nickel alloy/porous carbon composite wave-absorbing material. The method comprises the steps of: using cobalt chloride hexahydrateand nickel chloride hexahydrate as initial raw materials, preparing a hollow CoNi alloy firstly, using the hollow CoNi alloy as a core, forming a phenolic resin shell on the surface of the hollow CoNi alloy through in-situ polymerization of resorcinol and formaldehyde, and carrying out pyrolysis conversion to obtain the hollow cobalt-nickel alloy/porous carbon composite wave-absorbing material. The hollow cobalt-nickel alloy/porous carbon composite wave-absorbing material disclosed by the invention has the advantages of small relative density, strong oxidation resistance, strong acid and alkali resistance, excellent microwave absorption performance and the like, simple production process, low production cost, strong practical value and suitability for industrial large-scale production. 本发明一种制备空心钴镍合金/多孔碳复合吸波材料的方法以