Antimonene/graphene composite material for negative electrode of potassium ion battery and preparation method thereof
A technology of battery negative electrode and composite material, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of poor cycle performance, loss of electrical contact, complicated processes, etc., to improve electrochemical performance, easy process control, Simple preparation process
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Embodiment 1
[0028]The preparation steps of the antirectarne / graphene composite negative electrode material are as follows:
[0029](1) Place the metal bismuth 0.1 g in a mortar, pre-ground, and then dropped with a few drops of ethanol again, and retain the moist mill 1 h, transferred to 50 ml of centrifuge tube, and 30 mL of ethanol was added. Ultrasound 80 min in ice water, then centrifuged at 3000 rpm, and the supernatant was collected.
[0030](2) Mix the antimideole and oxide oxide in a ratio of mass ratio of 4: 1, and the ultrasonic dispersion is uniform, then vacuum filtration membrane.
[0031](3) The film obtained by filtration is placed in the reactor liner, then hydrated hydrate, and the amount of hydrazine is determined according to the mass ratio of the film and hydrate 1: 2. Reaction at 110 ° C for 10 hours to obtain a target product.
[0032]The samples of the samples and electrochemical properties in Example 1 showed that the prepared sample exhibited excellent capacity retention, exhibiti...
Embodiment 2
[0037]The preparation steps of the antirectarne / graphene composite negative electrode material are as follows:
[0038](1) Place the metal bismuth 0.1 g in a mortar, pre-grinding 10 min, adding a few drops of water, retaining moist mill 1 h, transferring to 50 ml of centrifugal tube, adding 30 ml of water. In the ice water bath, the ultrasound was 160 min, then centrifuged at 6000 rpm, and the supernatant was collected.
[0039](2) Hybridolene and oxide oxide in the ratio of mass ratio 2: 1, ultrasonic dispersion is uniform, then vacuum filtration membrane.
[0040](3) The film obtained by the filtration is placed in the reactor liner, then ethylene glycol is added, and the amount of hydrazine hydrazine is determined according to the mass ratio of the film and ethylene glycol 1: 1. The reaction was obtained at 80 ° C for 18 hours to obtain a target product.
[0041]The samples of the samples in Example 2 were analyzed and analyzed, respectively, and the results showed that the prepared sample...
Embodiment 3
[0043]The preparation steps of the antirectarne / graphene composite negative electrode material are as follows:
[0044](1) Place the metal bismuth 0.1 g in a mortar, pre-grind 10 min, and then drop the N-methylpyrrolidone, retain the moist mill 1 h, transferred to 50 ml of centrifuge tube, and 30 ml N - Methylpyrrolidone. Ultrasound 40 min in the ice water bath, then centrifuged at 1000 rpm, and the supernatant was collected.
[0045](2) Hybrid alkene and gossipide were mixed with a mass ratio of 5: 1, and the ultrasonic dispersion was uniform, then vacuum filtration membrane was performed.
[0046](3) The film obtained by the filtration is placed in the reactor liner, then formaldehyde is added, and the amount of hydrazine is determined according to the mass ratio of the film and formaldehyde 1: 4. The reaction was obtained at 150 ° C for 15 hours to obtain a target product.
[0047]The samples of the samples in Example 3 were analyzed and electrochemically analytical, and the results showed...
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