Antimonene/graphene composite material for negative electrode of potassium ion battery and preparation method of antimonene/graphene composite material
A composite material and battery negative electrode technology, which is applied in the direction of battery electrodes, negative electrodes, secondary batteries, etc., can solve problems such as complex process, loss of electrical contact, and powdering of active materials, so as to alleviate volume change, easy to control the process, and cycle The effect of performance improvement
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Embodiment 1
[0028] The preparation steps of the antimonene / graphene composite negative electrode material are as follows:
[0029] (1) Put 0.1 g of metal antimony in a mortar, pre-grind for 10 min, add a few drops of ethanol several times, keep wet grinding for 1 h, transfer it to a 50 mL centrifuge tube, and add 30 mL of ethanol. Sonicate in an ice-water bath for 80 min, then centrifuge at 3000 rpm and collect the supernatant.
[0030] (2) Mix antimonene and graphene oxide in a mass ratio of 4:1, disperse them uniformly by ultrasonic, and then perform vacuum filtration and membrane extraction.
[0031] (3) Put the membrane obtained by suction filtration into the inner lining of the reactor, then add hydrazine hydrate, and determine the amount of hydrazine hydrate according to the mass ratio of the membrane and hydrazine hydrate 1:2. The target product was obtained by reacting at 110°C for 10 hours.
[0032] The samples in Example 1 were analyzed and tested for their morphology and elec...
Embodiment 2
[0037] The preparation steps of the antimonene / graphene composite negative electrode material are as follows:
[0038] (1) Put 0.1 g of metal antimony in a mortar, pre-grind for 10 min, add a few drops of water several times, keep it wet for 1 h, transfer it to a 50 mL centrifuge tube, and add 30 mL of water. Sonicate in an ice-water bath for 160 min, then centrifuge at 6000 rpm and collect the supernatant.
[0039] (2) Mix antimonene and graphene oxide in a mass ratio of 2:1, disperse uniformly by ultrasonic, and then perform vacuum filtration and membrane extraction.
[0040] (3) Put the membrane obtained by suction filtration into the inner lining of the reactor, then add ethylene glycol, and determine the amount of hydrazine hydrate according to the mass ratio of the membrane and ethylene glycol 1:1. The target product was obtained by reacting at 80°C for 18 hours.
[0041] The samples in Example 2 were analyzed and tested for their morphology and electrochemical propert...
Embodiment 3
[0043] The preparation steps of the antimonene / graphene composite negative electrode material are as follows:
[0044] (1) Put 0.1 g of metal antimony in a mortar, pre-grind for 10 min, add a few drops of N-methylpyrrolidone several times, keep wet grinding for 1 h, transfer it to a 50 mL centrifuge tube, add 30 mL of N-methyl pyrrolidone. - Methylpyrrolidone. Sonicate in an ice-water bath for 40 min, then centrifuge at 1000 rpm and collect the supernatant.
[0045] (2) Mix antimonene and graphene oxide in a mass ratio of 5:1, disperse uniformly by ultrasonic, and then perform vacuum filtration and membrane extraction.
[0046] (3) Put the membrane obtained by suction filtration into the inner lining of the reactor, then add formaldehyde, and determine the amount of hydrazine hydrate according to the mass ratio of the membrane to formaldehyde 1:4. The target product was obtained by reacting at 150°C for 15 hours.
[0047] The samples in Example 3 were analyzed and tested fo...
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