Multiplex overcharging protection functional electrolyte for lithium ion battery
A technology for lithium-ion batteries and protection functions, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as damage and unsolved battery performance, reduce impact and damage, improve overcharge safety performance, and reduce negative effects Effect
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Embodiment 1
[0047] In a glove box filled with argon or nitrogen (H 2 O≤1ppm, O 2 ≤1ppm):
[0048] (1) Preparation of lithium-ion battery electrolyte
[0049] Weigh 29.16g each of organic solvents ethylene carbonate (EC), diethyl carbonate (DEC), and dimethyl carbonate (DMC) to prepare a mixed solvent in a mass ratio of 1:1:1; weigh the electrolyte lithium hexafluorophosphate (LiPF 6 ) 12.5g, slowly added to the mixed solvent several times in batches, shake well until the lithium salt is completely dissolved and cooled to normal temperature to prepare lithium-ion battery electrolyte, that is, blank comparison electrolyte. Among them, the solvent accounts for 87.5%, and the electrolyte accounts for 12.5%;
[0050] (2) Preparation of lithium-ion battery multiple overcharge protection functional electrolyte
[0051] Weigh 97.5g of lithium-ion battery electrolyte, redox pair additive 3-chloroanisole (3CA, oxidation potential 4.5V (vs.Li / Li + )) 0.5g, electropolymerization additive bipheny...
Embodiment 2
[0055] In a glove box filled with argon or nitrogen (H2O≤1ppm, O2≤1ppm):
[0056] (1) Preparation of lithium-ion battery electrolyte
[0057] Weigh 29.16g each of organic solvents ethylene carbonate (EC), ethyl methyl carbonate (EMC), and dimethyl carbonate (DMC) to prepare a mixed solvent in a mass ratio of 1:1:1; weigh the electrolyte lithium hexafluorophosphate (LiPF 6 ) 12.5g, slowly added to the mixed solvent several times in batches, shake well until the lithium salt is completely dissolved and cooled to normal temperature to prepare lithium-ion battery electrolyte. Among them, the solvent accounts for 87.5%, and the electrolyte accounts for 12.5%;
[0058] (2) Preparation of lithium-ion battery multiple overcharge protection functional electrolyte
[0059] Weigh 96g of lithium ion battery electrolyte, redox couple additive 2,5-difluoro-1,4-dimethoxybenzene (F 2 DMB, onset oxidation potential 4.27V, peak potential 4.37V (vs.Li / Li + )) 1g, electropolymerization additi...
Embodiment 3
[0063] In a glove box filled with argon or nitrogen (H 2 O≤1ppm, O 2 ≤1ppm):
[0064] (1) Preparation of lithium-ion battery electrolyte
[0065] Weigh organic solvents ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), propylene carbonate (PC) to prepare a total of 87.5g of mixed solvents in a mass ratio of 3:3:3:1 ; Weigh the electrolyte lithium hexafluorophosphate (LiPF 6 ) 12.5g, slowly added to the mixed solvent in batches several times, shake well until the lithium salt is completely dissolved and cooled to normal temperature to prepare lithium-ion battery electrolyte;
[0066] (2) Preparation of lithium-ion battery multiple overcharge protection functional electrolyte
[0067] Weigh 97.5g of lithium-ion battery electrolyte, redox pair additive 3-chloroanisole (3CA, oxidation potential 4.5V (vs.Li / Li + )) 0.5g, gas generating additive pyrocarbonate 2g, add together to the lithium ion battery electrolyte, shake well and disperse evenly to pre...
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