| abstract |
The invention discloses an amorphous iron oxide nanoparticle/multi-layer graphene composite material and a preparation method. The composite material uses a multi-layer graphene prepared by an ultrasonic method without activation on the surface as a substrate, and the amorphous iron oxide nanoparticles are uniformly covered on the surface of the composite material. Multilayer graphene surface. The preparation process of the composite material: using the mixed solvent of DMF and water as the solvent of the reaction system, adding expanded graphene and preparing multilayer graphene by ultrasonic method, then adding FeCl 2 and EDTA-2Na, magnetic force at 90 ℃ constant temperature The reaction is stirred for 2 hours, and after cooling, the composite material of the present invention is obtained by centrifugal cleaning and drying. The iron oxide particles in the composite material are amorphous, small in size, and have very high electrochemical activity. The multilayer graphene can provide a conductive network, which has potential applications in supercapacitor anode materials and lithium-ion battery anode materials. |