A kind of organic macromolecule negative electrode material for secondary battery and preparation method thereof
A technology of organic macromolecules and negative electrode materials, applied in battery electrodes, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of poor chemical stability, poor conductivity, battery capacity attenuation, etc., to achieve excellent energy storage performance, enhanced conductivity, The effect of high photothermal stability
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Embodiment 1
[0025] A kind of organic macromolecule negative electrode material for secondary batteries described in this embodiment is a multi-layer composite structure formed by alternately overlapping metal phthalocyanine tetrasulfonic acid tetrasalt sheets and graphene oxide sheets, and its thickness is 2~20um. Its preparation method comprises the following steps:
[0026] Step 1: Measure 180m of concentrated sulfuric acid and 20ml of concentrated phosphoric acid respectively, and then weigh 1.5g of flake graphite;
[0027] Step 2: Put concentrated sulfuric acid, concentrated phosphoric acid and flake graphite into a three-necked flask in a water bath at room temperature, and slowly mechanically stir, then add 6 to 10 g of potassium permanganate in 3 to 5 times and keep the controlled temperature not higher than 50°C , then mechanically stir the resulting mixture at 40-55°C for 12-24 hours until the dark green liquid turns into a brown liquid, and finally add hydrogen peroxide slowly ...
Embodiment 2
[0038] A kind of organic macromolecule negative electrode material for secondary batteries described in this embodiment is a multi-layer composite structure formed by alternately overlapping metal phthalocyanine tetrasulfonic acid tetrasalt sheets and graphene oxide sheets, and its thickness is 2-20um. Its preparation method comprises the following steps:
[0039] Step 1~step 3, as embodiment 1;
[0040] Step 4: Weigh 80mg of nickel II phthalocyanine tetrasulfonic acid tetrapotassium salt and dissolve it in 40ml of deionized aqueous solution and stir for 0.5h until completely dissolved; then weigh 40mg of graphene oxide and dissolve it in 30ml of mixed solution (ethanol: water = 1: 1), and ultrasonically oscillate at 20°C for 0.5h, mix the two solutions evenly and stir for 4h;
[0041] Step 5: Put the above mixed solution into a polytetrafluoroethylene kettle, and heat it in high temperature water at 120°C for 24 hours;
[0042] Step 6: Put the above mixed solution in the r...
Embodiment 3
[0046] A kind of organic macromolecule negative electrode material for secondary batteries described in this embodiment is a multi-layer composite structure formed by alternately overlapping metal phthalocyanine tetrasulfonic acid tetrasalt sheets and graphene oxide sheets, and its thickness is 2~20um. Its preparation method comprises the following steps:
[0047] Step 1~step 3, as embodiment 1;
[0048] Step 4: Weigh 40mg of nickel II phthalocyanine tetrasulfonic acid tetrasodium salt and dissolve it in 40ml of deionized aqueous solution and stir for 0.5h until completely dissolved; then weigh 40mg of graphene oxide and dissolve it in 30ml of mixed solution (ethanol: water = 8: 1), and ultrasonically oscillate at 50°C for 0.3h, mix the two solutions evenly and stir for 4h;
[0049] Step 5: Put the above mixed solution into a polytetrafluoroethylene-lined crystallization kettle, and heat it in high temperature water at 250°C for 12 hours;
[0050] Step 6: Put the above mixe...
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