High performance lithium ion secondary battery and manufacture method
A secondary battery, lithium ion technology, used in secondary batteries, electrode manufacturing, battery electrodes, etc., can solve problems such as impact, physical and mental harm of production workers and surrounding environment, gas leakage, etc., to achieve abundant resources and controllable production cycle , the effect of low cost
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[0032] Example 1:
[0033] For the positive electrode, take the modified lithium iron phosphate (LiFe 0.75 Ni 0.25 PO4) + organic silica gel crosslinking additive, modified polyethylene oxide + conductive carbon black = 100: 30:1 (by weight ratio), add 25% of the total weight of water, mix in a mixer, stir, then filter, uniform Coated on aluminum foil and dried at 55°C to make a positive pole piece.
[0034] For the negative electrode, take artificial graphite + conductive carbon black + styrene butadiene rubber + sodium carboxymethyl cellulose = 90%: 1%: 2%: 2%, mix with 52% water, stir, filter, and evenly coat the copper The foil is dried at 70°C to form a negative pole piece.
[0035] The positive and negative pole pieces are rolled, riveted, and assembled with the diaphragm to form the pole into a 16340 (CR123A) battery case, and 2 to 4 g of electrolyte is added per piece.
[0036] After sealing, stand at 60°C for 3 days, pre-charge with a small current of 0.01C, and stand at ...
Example Embodiment
[0037] Example 2:
[0038] Take modified lithium iron phosphate (LiFe 0.65 Mn 0.35 PO4) + polyvinyl alcohol + conductive carbon black = 100: 15: 2 (by weight ratio), add 28% of the total weight of water, mix in a mixer, stir, then filter, and evenly coat on the aluminum foil, after 85 Dry at ℃ to make the positive pole piece.
[0039] Negative electrode: take artificial graphite + conductive carbon black + styrene butadiene rubber + sodium carboxymethyl cellulose = 95%: 0.5%: 2.5%: 2%:, mix with 55% water, stir, filter, and evenly coat copper The foil is dried at 70°C to form a negative pole piece.
[0040]The positive and negative pole pieces are rolled, riveted, and assembled with the diaphragm to form the pole into a 16340 (CR123A) battery case, and 2 to 4 g of electrolyte is added per piece.
[0041] After sealing, stand for 5 days at 15°C, pre-charge with a small current of 0.1C, and stand at 70°C for 18 days, divide the capacity, and pass the 1C discharge test. The battery c...
Example Embodiment
[0042] Example 3:
[0043] Take modified lithium iron phosphate (LiFe 0.55 Ca 0.45 PO4)+polyacrylamide+conductive carbon black=120:10:1 (by weight ratio), add 25% of the total weight of water, mix in a stirrer, stir, then filter, evenly coat on the aluminum foil, after 150 Dry at ℃ to make positive pole piece.
[0044] Negative electrode: Take artificial graphite + conductive carbon black + styrene-butadiene rubber + sodium carboxymethyl cellulose = 94.5%: 0.5%: 3%: 2%:, mix with 58% water, stir, filter, and evenly coat on copper foil After drying at 70°C, the negative pole piece is made.
[0045] The positive and negative pole pieces are rolled, riveted, and assembled with the diaphragm to form the pole into a 16340 (CR123A) battery case, and 2 to 4 g of electrolyte is added per piece.
[0046] After sealing, let stand at 70℃ for 1 day, pre-charge with a small current of 0.65C, and stand at 60℃ for 15 days, divide the capacity, pass 1C discharge test, battery capacity 460mAh, cha...
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