Method for fabricating positive plates of lithium ion batteries, and positive plates and lithium ion batteries produced by the method
A lithium-ion battery and manufacturing method technology, applied in the field of lithium-ion battery manufacturing, lithium-ion battery positive electrode sheet manufacturing, and lithium-ion battery positive electrode sheet, can solve the problems of low gelatin molecular weight, hard aluminum foil, and inability to obtain surface density positive electrode sheets, etc. , to achieve the effect of less dosage and no pollution
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Embodiment 1
[0042] Use PEO (polyethylene oxide) as auxiliary adhesive, press LiCoO 2 : conductive carbon black: gelatin: PEO=100:2:2; 0.5 ingredients.
[0043] First, dissolve 20g of gelatin and 5g of PEO (molecular weight: 250,000) with 460ml and 250ml of pure water respectively to obtain gelatin solution and PEO solution, add 0.1M LiOH aqueous solution dropwise to the gelatin solution, and adjust its pH value to 7-9 between; then, the prepared 420ml gelatin solution and 1000g dry LiCoO 2 Pour the positive electrode material powder (manufactured by CITIC Guoan Company) into a small egg beater, stir at 4000 rpm for half an hour, then add 20g of conductive agent Super P to the above mixture in batches, continue stirring at high speed for 2 hours, wait until the slurry is roughly mixed After uniformity, add the prepared auxiliary adhesive PEO solution and stir for another 2 hours. Finally, pour the remaining 40ml of gelatin solution and continue to stir for 1.5 hours, then the preparation...
Embodiment 2
[0045] Use PVA (polyvinyl alcohol) as auxiliary adhesive, press LiNiO 2 : conductive carbon black: gelatin: PVA=100:3:2:0.5 ingredients.
[0046] First, dissolve 20g of gelatin and 5g of PVA (molecular weight: 150,000) with 460ml and 250ml of pure water respectively to obtain a gelatin solution and a PVA solution. Add 0.1M LiOH aqueous solution dropwise to the gelatin solution to adjust its pH value to 7-9 Between; Then, the prepared 420ml gelatin solution and 1000g dry LiNiO 2 Pour the positive electrode material powder into a small egg beater, stir at 4000 rpm for half an hour, then add 30g of conductive agent Super P to the above mixture in batches, continue stirring at high speed for 2 hours, after the slurry is roughly mixed, add the compounding agent Good auxiliary adhesive PVA solution, and stirred for another 2 hours. Finally, pour the remaining 40ml of gelatin solution and continue to stir for 1.5 hours, then the preparation of slurry is completed. After passing th...
Embodiment 3
[0048] Use PEO as auxiliary adhesive, press LiMn 2 o 4 : conductive carbon black: gelatin: PEO=100:3:2:1 ingredients.
[0049] First, 20g of gelatin and 10g of PEO (5 grams each with a molecular weight of 150,000 and 450,000) were dissolved with 400ml and 320ml of purified water respectively to obtain a gelatin solution and a PEO solution, and 0.1M LiOH aqueous solution was added dropwise to the gelatin solution to adjust its pH The value is adjusted to between 7-9; Then, mix 360ml gelatin solution and 1000g dry LiMn 2 o 4 Pour the positive electrode material powder into a small egg beater, stir at 3000 rpm for half an hour, then add 30g of conductive agent Super P to the above mixture in 4 batches, continue stirring at high speed for 2 hours, after the slurry is roughly mixed, add The prepared auxiliary adhesive PEO solution was stirred for another 2 hours. Finally, pour the remaining 40ml of gelatin solution and continue to stir for 1.5 hours, then the preparation of slu...
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