Electrolyte of considering high temperature cycle performance and low temperature cycle performance of battery and lithium-ion battery
A high-low temperature cycle, lithium-ion battery technology, applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of conductivity, cycle and high temperature performance, and can not optimize the function of battery materials, etc., to broaden the use temperature range, Good cycle performance and enhanced competitiveness
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[0018] Example 1
[0019] (1) Electrolyte preparation: According to EC (ethylene carbonate): PC (propylene carbonate): DEC (diethyl carbonate): EMC (methyl ethyl carbonate): VC (vinylene carbonate): PS ( Propylene sulfite)=35:5:35:25:2:2.5 in volume ratio, prepare electrolyte with lithium salt concentration of 1mol / L, in which EC, PC, DEC and EMC are non-aqueous solvents, VC and PS are Additive, lithium salt is a component of the following structural formula:
[0020] .
[0021] (2) Preparation of cathode material: mix with 91% LiFePO by weight 4 (Positive active material), SP (superconducting carbon black) with a weight percentage of 4% and PVDF (binder) with a weight percentage of 5%, and N-methylpyrrolidone is added to it to make a slurry. The slurry is coated on the aluminum foil, dried and then rolled to obtain a positive electrode material.
[0022] (3) Preparation of negative electrode material: mix 75% by weight of artificial graphite, 20% by weight of mesocarbon microspher...
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