A kind of preparation method of conductive agent for lithium ion battery
A lithium-ion battery and conductive agent technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of poor electrochemical performance of conductive agents, achieve high porosity, improve charge and discharge efficiency, and increase migration rate.
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example 1
[0022] Take 3g polyethylene glycol, add 100mL mass fraction of 5% cuproammonia solution, stir at 300r / min for 20min, then add 5g of cellulose, continue stirring for 1h, add dropwise into liquid nitrogen at 1g / min, after the dropwise addition Take out the frozen balls, put the frozen balls in a freeze-drying box, and freeze-dry them at -30 ° C for 20 h. ℃ for 1 hour, then heated to 900 ℃ at a heating rate of 5 ℃ / min for 2 hours, and finally lowered the temperature to 500 ℃ at a rate of 5 ℃ / min, then cooled naturally to room temperature to obtain copper-coated carbon airgel , soak 3g of copper-coated carbon airgel in 50g of nitric acid solution with a mass fraction of 5%, ultrasonically clean it with 300W ultrasonic wave for 5min, take it out by filtration, wash it with deionized water for 3 times, then put it in a drying oven, and put it in a nitrogen atmosphere Drying to constant weight at a lower temperature to obtain pretreated copper-coated carbon airgel, take 1g of pretrea...
example 2
[0024] Take 4g polyethylene glycol, add 100mL mass fraction of 5% cuproammonia solution, stir at 300r / min for 20min, then add 6g of cellulose, continue stirring for 1h, add dropwise into liquid nitrogen at 1g / min, after the dropwise addition Take out the frozen spheres, put the frozen spheres in a freeze-drying box, and freeze-dry them at -40°C for 30 hours, place the dried product in a tube furnace, and heat them to 450°C at a heating rate of 5°C / min under a nitrogen atmosphere. ℃ for 1 hour, then heated to 950 ℃ at a heating rate of 5 ℃ / min for 2 hours, and finally lowered the temperature to 500 ℃ at a rate of 5 ℃ / min, then cooled naturally to room temperature to obtain copper-coated carbon airgel , soak 4g of copper-coated carbon airgel in 50g of nitric acid solution with a mass fraction of 5%, ultrasonically clean it with 300W ultrasonic wave for 8min, take it out by filtration, wash it with deionized water for 4 times, then put it in a drying oven, and put it in a nitrogen...
example 3
[0026]Take 5g of polyethylene glycol, add 120mL of 5% cuproammonia solution, stir at 400r / min for 30min, then add 10g of cellulose, continue stirring for 2h, add dropwise into liquid nitrogen at 2g / min, after the dropwise addition Take out the frozen spheres, put the frozen spheres in a freeze-drying box, and freeze-dry them at -40°C for 40h, place the dried product in a tube furnace, and heat them to 500°C at a heating rate of 5°C / min under a nitrogen atmosphere. ℃ for 2 hours, then heated to 1000 ℃ at a heating rate of 5 ℃ / min for 3 hours, and finally lowered the temperature to 500 ℃ at a rate of 5 ℃ / min, then cooled naturally to room temperature to obtain copper-coated carbon airgel , soak 5g copper-coated carbon airgel in 60g mass fraction of 5% nitric acid solution, clean it with 300W ultrasonic wave for 10min, take it out by filtration, wash it with deionized water for 5 times, put it in a drying oven, and put it in a nitrogen atmosphere Dry to constant weight at lower t...
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