A multi -layer nuclear shell structure binary cobalt nickel metal oxide parcel polymine nano -composite material and their preparation methods and applications
A multi-layer core-shell structure and nano-composite material technology, applied in structural parts, electrical components, secondary batteries, etc., can solve problems such as limiting the improvement of chemical properties of lithium-ion batteries, low theoretical capacity, etc. , The synthesis process is simple, and the effect of preventing the collapse of the structure
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Embodiment 1
[0067] A method for preparing a multi-layer core-shell structure binary cobalt-nickel metal oxide-wrapped polyaniline nanocomposite material, comprising the following steps:
[0068] 1) Preparation of binary cobalt-nickel metal oxide micro-carbon sphere precursor: weigh 0.014mol of glucose, 0.01mol of cobalt acetate tetrahydrate, and 0.005mol of nickel acetate tetrahydrate in a beaker, add 30mL of high-purity water, and stir under magnetic stirring for 15 minutes. The resulting red-brown transparent solution was poured into a 50mL polytetrafluoroethylene reactor liner, and the reaction was carried out under the condition of 180 ° C for 8 hours. Washed three times and dried in an oven at 60 °C for 12 hours, that is, the precursor of multi-shell binary cobalt nickel metal oxide micro-carbon spheres, that is, multi-shell Co 3 O 4 -NiO micro-carbon sphere precursor, black-brown powder;
[0069] 2) High temperature calcination: the dark brown powder obtained in step 1) was placed...
Embodiment 2
[0082] A method for preparing a multi-layer core-shell structure binary cobalt-nickel metal oxide-wrapped polyaniline nanocomposite material, comprising the following steps:
[0083] 1) the preparation method of binary cobalt-nickel metal oxide micro-carbon balls is the same as in Example 1;
[0084] 2) high temperature calcination is the same as in Example 1;
[0085] 3) In-situ growth of polyaniline: Weigh 0.2 g of the black powder obtained in step 2) and ultrasonically disperse it in 60 mL of 0.5 M dilute sulfuric acid, add 455 μL of aniline to it to obtain solution a; at the same time, dissolve 0.575 g of ammonium persulfate in 40 mL The 0.5M dilute sulfuric acid solution obtained from the solution b was slowly added dropwise to the solution a, and then the in-situ growth of polyaniline was completed by continuing to stir and react for 3 hours in an ice bath at 0-2°C. The samples were then centrifuged, washed three times with high-purity water, and dried in an oven at 60°...
Embodiment 3
[0087] A method for preparing a multi-layer core-shell structure binary cobalt-nickel metal oxide-wrapped polyaniline nanocomposite material, comprising the following steps:
[0088] 1) the preparation method of binary cobalt-nickel metal oxide micro-carbon balls is the same as in Example 1;
[0089] 2) high temperature calcination is the same as in Example 1;
[0090] 3) In-situ growth of polyaniline: Weigh 0.2 g of the black powder obtained in step 2) and ultrasonically disperse it in 60 mL of 0.5 M dilute sulfuric acid, add 228 μL of aniline to it to obtain solution a; at the same time, dissolve 0.288 g of ammonium persulfate in 40 mL The 0.5M dilute sulfuric acid solution obtained from the solution b was slowly added dropwise to the solution a, and then the in-situ growth of polyaniline was completed by continuing to stir and react for 3 hours in an ice bath at 0-2°C. The samples were then centrifuged, washed three times with high-purity water, and dried in an oven at 60°...
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