Organic electrolyte capable of improving low-temperature performance of lithium manganese battery
An organic electrolyte, low-temperature performance technology, applied in the field of electrochemistry, can solve the problems of limiting the use of lithium-manganese batteries, low-temperature discharge performance is not helpful, and high production costs, and achieves improved low-temperature discharge performance, high solvent dielectric constant, and widening solution. range effect
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[0020] Example 1.
[0021] Mix 20% of propylene carbonate, 10% of dimethyl carbonate, 30% of ethylene glycol dimethyl ether, 8% of tetrahydrofuran, and 5% of dimethyl sulfoxide, which account for the mass fraction of the electrolyte, and separate them in the mixed solution. Add benzoic anhydride accounting for 9.5% of the electrolyte mass fraction, 0.5% 2,6-di-tert-butyl-4-methylphenol, and then add 15% of the electrolyte mass fraction of lithium perchlorate, 2% three The lithium fluoromethanesulfonate was completely dissolved and stirred for 48 hours. When the moisture reached 60 ppm, the organic electrolyte was obtained by filtration.
Example Embodiment
[0022] Example 2.
[0023] 5% ethylene carbonate, 10% propylene carbonate, 25% ethyl acetate, 10% ethylene glycol dimethyl ether, 20% 1,3-dioxolane, 10% % Tetrahydrofuran, 3% dimethyl sulfoxide, add phthalic anhydride and 0.05% 2,6-di-tert-butyl-4-methylphenol to the mixed solution, accounting for 1.95% of the electrolyte mass fraction, Then add 10% of the electrolyte mass fraction of lithium perchlorate and 5% of lithium tetrafluoroborate, completely dissolve and stir for 36 hours, and filter to obtain an organic electrolyte when the moisture reaches 35 ppm.
Example Embodiment
[0024] Example 3.
[0025] Mix propylene carbonate accounting for 25% of electrolyte mass fraction, 25% methyl formate, 25% 1,3-dioxolane, and 11% tetrahydrofuran, and add 0.97 accounting for electrolyte mass fraction into the mixed solution. % Of phthalic anhydride and 0.03% of 2,6-di-tert-butyl-4-methylphenol, and then add 13% of the electrolyte mass fraction of lithium perchlorate, completely dissolved and stirred for 48 hours, when moisture When it reaches 25 ppm, an organic electrolyte is obtained by filtration.
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