A novel graphene conductive agent for a lithium ion battery and a preparation method thereof
A lithium-ion battery and graphene technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of hindering the lithium ion transmission process, reducing electrode energy density, performance degradation, etc., to achieve excellent electrical conductivity, reduce battery internal resistance, the effect of increasing capacity
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Embodiment 1
[0022] A preparation method for a novel lithium-ion battery graphene conductive agent, comprising the following steps:
[0023] (1) 20g of graphene, 10g of Ketjen Black and 100g of polyethylene glycol were ultrasonically dispersed for 10 minutes to obtain a premixed solution, the ultrasonic frequency being 2450MHz, and the above premixed solution was vacuum-dried at 20-25°C for 12 hours to obtain a dried solid;
[0024] (2) Send the dried solid into a circulating tubular jet mill for 2 minutes to obtain superfine pulverized solid powder. The gas inside the jet mill is helium, the crushing pressure is 0.6MPa, and the gas consumption is 15m 3 / min;
[0025] (3) The obtained solid powder of the above step (2) is stirred and mixed with 50g polyvinylidene fluoride and 2g aluminum oxide to obtain a mixed solution, and the mixed solution is microwave-dispersed for 30s to obtain a graphene conductive agent, and the frequency of the microwave source is 2450MHz, The maximum output powe...
Embodiment 2
[0027] A preparation method for a novel lithium-ion battery graphene conductive agent, comprising the following steps:
[0028] (1) 15g of graphene, 15g of acetylene black, 15g of superconducting carbon black and 120g of N-methylpyrrolidone were ultrasonically dispersed for 10 minutes to obtain a premixed solution, and the ultrasonic frequency was 2450MHz, and the above premixed solution was vacuum-dried at 20-25°C for 12 hours, A dry solid is obtained;
[0029] (2) Send the dried solid into a circulating tubular jet mill for 2 minutes to obtain superfine pulverized solid powder. The gas inside the jet mill is argon, the crushing pressure is 0.6MPa, and the gas consumption is 15m 3 / min;
[0030] (3) The obtained solid powder of the above step (2) is stirred and mixed with 60g polyvinylidene fluoride and 1g lanthanum oxide to obtain a mixed solution, and the mixed solution is microwave-dispersed for 30s to obtain a graphene conductive agent, and the frequency of the microwave...
Embodiment 3
[0032] A preparation method for a novel lithium-ion battery graphene conductive agent, comprising the following steps:
[0033] (1) 10g of graphene, 10g of acetylene black, 10g of carbon nanotubes and 150g of monoethanolamine were ultrasonically dispersed for 10 minutes to obtain a premixed solution with an ultrasonic frequency of 2450 MHz, and the above premixed solution was vacuum-dried at 25 to 30°C for 20 hours to obtain dry solid;
[0034] (2) Send the dried solid into a circulating tubular jet mill for 4 minutes to obtain superfine pulverized solid powder. The gas inside the jet mill is argon, the crushing pressure is 0.8MPa, and the gas consumption is 15m 3 / min;
[0035] (3) the obtained solid powder of the above step (2) is stirred and mixed with 60g polyvinylidene fluoride and 2g ruthenium oxide to obtain a mixed solution, and the mixed solution is microwave-dispersed for 30s to obtain a graphene conductive agent, and the frequency of the microwave source is 2450MHz...
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