Ultrathin interface modified zinc metal negative electrode material as well as preparation and application thereof
A negative electrode material and interface modification technology, applied in the direction of negative electrodes, battery electrodes, active material electrodes, etc., can solve the problems of high preparation cost, high preparation condition requirements, and restrictions on the application of zinc metal anode materials, so as to reduce the contact area and effectively Facilitate deposition, avoid corrosion and dendrite effect
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Embodiment 1
[0054] (1) select N-doped graphene material (N doping amount is 1.5wt%) as the functionalized graphene material, and add it in dehydrated alcohol, mix well, be prepared into the slurry that concentration is 3mg / mL;
[0055] (2) First adopt 2000 order, 4000 order sandpaper to polish the surface of zinc foil to be deposited, remove the oxide film on its surface, and make its surface smooth and flat; The surface of the zinc foil is perpendicular to the bottom surface of the beaker) is immersed in a beaker filled with deionized water, and the step (1 ) was added dropwise into the beaker at a constant speed, and when the slurry was spread on the water surface and spread to the surface of the zinc foil to be deposited, the zinc foil was pulled vertically upward at a constant speed at a speed of 1 mm / s, and pulled out from the solution A functionalized graphene protective layer is deposited on the surface of the zinc foil to be deposited. If functionalized graphene is partially depos...
Embodiment 2
[0064] On the basis of embodiment 1, only the graphene material (N doping amount is 1.5wt%) replaced with P-doping graphene material (P doping amount is 1.5wt%) in step (1) ), and the other steps and conditions remain unchanged, correspondingly, an ultrathin interface-modified zinc metal anode material is obtained, which is abbreviated as PGO@Zn.
[0065] It can be seen macroscopically that in the PGO@Zn prepared in this example, the functionalized graphene protective layer (abbreviated as PGO protective layer) is evenly covered on the zinc foil.
[0066] The microscopic morphology of the PGO@Zn prepared in this example was characterized. According to the characterization results, it was found that there were a large number of PGO wrinkles on the surface of the zinc foil, indicating that the PGO protective layer was successfully covered on the surface of the zinc foil, and the thickness of the PGO protective layer deposited on the zinc foil was 116nm.
[0067] The PGO@Zn prep...
Embodiment 3
[0072] On the basis of Example 1, only the graphene material (N doping amount is 1.5wt%) replaced with S-doping graphene material (S doping amount is 1.5wt%) in step (1) ), and the other steps and conditions remain unchanged, correspondingly, an ultrathin interface-modified zinc metal anode material is obtained, which is abbreviated as SGO@Zn.
[0073] It can be seen macroscopically that in the SGO@Zn prepared in this example, the functionalized graphene protective layer (abbreviated as SGO protective layer) evenly covers the zinc foil.
[0074]The microscopic morphology of the SGO@Zn prepared in this example was characterized. According to the characterization results, it was found that there were a large number of SGO wrinkles on the surface of the zinc foil, indicating that the SGO protective layer was successfully covered on the surface of the zinc foil, and the thickness of the SGO protective layer deposited on the zinc foil was 113nm.
[0075] The SGO@Zn prepared in thi...
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Abstract
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