Tin-nickel-carbon alloy composite material for lithium ion battery and preparation method thereof
A technology of lithium-ion batteries and composite materials, which is applied in the field of tin-nickel-carbon alloy composite materials for lithium-ion batteries and its preparation, can solve the problems of powdered electrode performance of electrode materials, poor battery cycle performance, and deterioration, so as to improve the overall capacity , Improve the effect of cycle stability and life
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[0046] The first embodiment
[0047] The tin-nickel-carbon alloy composite material for lithium-ion batteries is composed of 15% nickel powder, 20% tin powder, 58% graphite and 7% pitch, and the above percentages are mass percentages.
[0048] The preparation method of the tin-nickel-carbon alloy composite material for lithium ion batteries in this embodiment is as follows:
[0049] (1) First, mix 15% tin powder and 20% nickel powder according to the mass ratio and add an appropriate amount of alcohol for high-energy mechanical ball milling for 10 hours;
[0050] (2) Then mix the alloy powder obtained by the above mechanical ball milling with 58% graphite and add alcohol to continue high-energy mechanical ball milling for 8 hours, and the particle size of the added graphite is 15μmm;
[0051] (3) Take out the above-mentioned tin-nickel alloy carbon composite material by suction filtration to remove alcohol, then put it into an oven for vacuum drying for 8 hours, and then conduct high-te...
Example
[0054] Second embodiment
[0055] The tin-nickel-carbon alloy composite material for lithium-ion batteries is composed of 20% nickel powder, 25% tin powder, 45% graphite and 10% pitch. The above percentages are mass percentages.
[0056] The preparation method of the tin-nickel-carbon alloy composite material for lithium ion batteries in this embodiment is as follows:
[0057] (1) First, mix 20% tin powder and 25% nickel powder according to the mass ratio and add an appropriate amount of alcohol to high-energy mechanical ball milling for 12 hours;
[0058] (2) Then mix the alloy powder obtained by the mechanical ball milling with 45% graphite and add alcohol to continue high-energy mechanical ball milling for 10 hours, the particle size of the added graphite is 17μmm;
[0059] (3) Take out the above-mentioned tin-nickel alloy carbon composite material by suction filtration to remove alcohol, then put it into an oven for vacuum drying for 12 hours, and then conduct high-temperature heat ...
Example
[0062] The third embodiment
[0063] The tin-nickel-carbon alloy composite material for lithium-ion batteries is composed of 25% nickel powder, 30% tin powder, 35% graphite and 10% pitch. The above percentages are mass percentages.
[0064] The preparation method of the tin-nickel-carbon alloy composite material for lithium ion batteries in this embodiment is as follows:
[0065] (1) First, mix 25% tin powder and 30% nickel powder according to the mass ratio and add an appropriate amount of alcohol to high-energy mechanical ball milling for 15 hours;
[0066] (2) Then mix the alloy powder obtained by the above mechanical ball milling with 35% graphite and add alcohol to continue high-energy mechanical ball milling for 15 hours, the particle size of the added graphite is 18 μmm;
[0067] (3) Take out the above-mentioned tin-nickel alloy carbon composite material by suction filtration to remove the alcohol, then put it into an oven for vacuum drying for 16 hours, and then conduct high-tem...
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