Low temperature multiplying power type lithium ion battery
A lithium-ion battery and rate technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as premature discharge voltage, failure to discharge electricity, and lower discharge platform
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Embodiment 1
[0023] Low-temperature rate lithium-ion battery A1 with a rated capacity of 5Ah: composed of positive electrode, negative electrode, separator and electrolyte. Among them, the positive electrode contains (calculated by weight percentage of solid): 98.2% LiCoO 2 (D 50 5.2um), 0.8% binder PVDF, 1% conductive agent CNT; the negative electrode contains (calculated by weight percentage of solid): 74% artificial graphite, 20% hard carbon, 1.5% conductive agent KS-6, 1.5% Conductive agent SP, 3% binder PVDF, 0.25% oxalic acid; polyethylene ceramic film is used as diaphragm; low-temperature electrolyte containing vinylene carbonate and fluoroethylene carbonate is selected.
Embodiment 2
[0025] Low-temperature rate lithium-ion battery A2 with a rated capacity of 5Ah: composed of positive electrode, negative electrode, separator and electrolyte. Among them, the positive electrode contains (calculated by weight percentage of solid): 96% LiCoO 2 (D 50 7.2um), 2% binder PVDF, 2% conductive agent CNT; the negative electrode contains (calculated by weight percentage of solid): 78% artificial graphite, 15% hard carbon, 3% conductive agent SP, 4% bond Agent PVDF, 0.15% oxalic acid; use polyethylene ceramic film as the diaphragm; use low-temperature electrolyte containing vinylene carbonate and fluoroethylene carbonate.
Embodiment 3
[0027] According to the method of Example 1, the low-temperature rate lithium-ion battery A3 with a rated capacity of 5Ah is obtained, the difference is that the LiCoO in the positive electrode 2 Change to LiNi 0.4 co 0.1 mn 0.5 o 2 .
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