Vulcanized cobalt-nickel/graphene/carbon nano fiber composite material and preparation method thereof
A carbon nanofiber, cobalt-nickel sulfide technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems affecting catalytic properties and energy storage cycle stability, active sites cannot be fully exposed, etc. The experimental design is clever, easy to operate, and the effect of high specific surface area
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[0035] Example 1, This embodiment includes the following steps:
[0036] (1) Add 1g of polyacrylonitrile powder to 5mL N,N- Stir continuously in the dimethylformamide solvent to prepare a uniform viscous dispersion.
[0037] (2) Electrospin the obtained polyacrylonitrile dispersion, and the adjustment process parameters are: electrostatic field voltage 20kV, spinning speed 0.3mmmin -1 , The receiving distance is 20cm, and the polyacrylonitrile nanofiber membrane is prepared.
[0038] (3) Pre-oxidize the obtained polyacrylonitrile spun membrane in an air atmosphere, the pre-oxidation temperature is 250℃, and the heating rate is 1℃min -1 , The pre-oxidation time is 1.5h, and the pre-oxidized polyacrylonitrile nanofiber membrane is prepared.
[0039] (4) Cut the pre-oxidized 100mg polyacrylonitrile nanofiber membrane into small pieces and put it into 20mL of 1mgmL -1 Mechanical stirring is performed in the graphene oxide solution to prepare a uniform graphene oxide / polyacrylonitrile nano...
Example Embodiment
[0045] Example 2, Change the mass of cobalt nitrate in Example 1 to 116mg, the mass of nickel nitrate to 58mg, and the mass of thiourea to 100mg. The rest are the same as in Example 1. The final composite material obtained is denoted as NiCo 2 S 4 / GNS / CNF-2. Implementation results: Cobalt-nickel sulfide nanosheets are uniformly grown on graphene / carbon nanofiber aerogels; and NiCo 2 S 4 / GNS / CNF-1 compared to NiCo 2 S 4 The cobalt-nickel sulfide nanosheets in / GNS / CNF-2 have smaller layers and less content.
Example Embodiment
[0046] Example 3, The mass of cobalt nitrate in Example 1 is changed to 464 mg, the mass of nickel nitrate is changed to 232 mg, and the mass of thiourea is changed to 400 mg. The rest are the same as in Example 1. The final composite material obtained is denoted as NiCo 2 S 4 / GNS / CNF-3. Implementation results: Cobalt-nickel sulfide nanosheets are uniformly grown on graphene / carbon nanofiber aerogels; and NiCo 2 S 4 / GNS / CNF-1 compared to NiCo 2 S 4 The cobalt-nickel sulfide nanosheets in / GNS / CNF-3 have larger lamellae and higher content.
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