Homogeneous core-shell structure cobaltosic sulfide nanometer material, preparation method and application of being as super capacitor electrode material thereof
A technology of cobalt tetrasulfide and nanomaterials, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., and can solve problems such as single structure of cobalt tetrasulfide nanosheets, high cost of graphene oxide, and cumbersome experimental procedures. , to achieve excellent electrochemical performance, easy promotion, and simple operation
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Embodiment 1
[0035] A preparation method of a homogeneous core-shell structure cobalt tetrasulfide nanometer material, comprising the following steps:
[0036] A. Dissolve cobalt chloride hexahydrate and urea in water respectively, the concentration of cobalt salt in the solution is 0.075 mol / liter, the concentration of urea is 0.375 mol / liter, and a small piece of clean foam nickel (2cm×3cm) is immersed in the mixed solution , react at 95°C for 8 hours, after cooling, take out the nickel foam sheet, wash it, and dry it to obtain the precursor;
[0037] B. Put the precursor prepared in step A into the autoclave, add 0.02 mol / L Na 2 The S solution was immersed in the precursor, heated to 110°C, reacted for 4 hours, and the nickel foam was taken out. After washing and drying, the nickel foam loaded with homogeneous core-shell structure cobalt trisulfide nanomaterials was prepared.
[0038] A sample of the final product was characterized by X-ray powder diffraction as figure 1 shown. The m...
Embodiment 2
[0041] A preparation method of a homogeneous core-shell structure cobalt tetrasulfide nanometer material, comprising the following steps:
[0042]A. Dissolve cobalt chloride hexahydrate and urea in water respectively, the concentration of cobalt salt in the solution is 0.1 mol / liter, the concentration of urea is 0.4 mol / liter, and a small piece of clean foam nickel (2cm×3cm) is immersed in the mixed solution , react at 140°C for 2 hours, after cooling, take out the nickel foam sheet, wash it, and dry it to obtain the precursor;
[0043] B. Put the precursor obtained in step A into the autoclave, add 0.1 mol / L Na 2 The S solution was immersed in the precursor, heated to 110°C, reacted for 4 hours, and the nickel foam was taken out. After washing and drying, the nickel foam loaded with homogeneous core-shell structure cobalt trisulfide nanomaterials was prepared.
Embodiment 3
[0045] A preparation method of a homogeneous core-shell structure cobalt tetrasulfide nanometer material, comprising the following steps:
[0046] A. Dissolve cobalt chloride hexahydrate and urea in water respectively, the concentration of cobalt salt in the solution is 0.02 mol / liter, the concentration of urea is 0.1 mol / liter, and a small piece of clean foam nickel (2cm×3cm) is immersed in the mixed solution , react at 140°C for 4 hours, after cooling, take out the nickel foam sheet, wash it, and dry it to obtain the precursor;
[0047] B. Put the precursor prepared in step A into the autoclave, add 0.02 mol / L Na 2 The S solution was immersed in the precursor, heated to 110°C, reacted for 4 hours, and the nickel foam was taken out. After washing and drying, the nickel foam loaded with homogeneous core-shell structure cobalt trisulfide nanomaterials was prepared.
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