Electrolyte of colloid polymer, colloid electrode and colloid lithium ion battery as well as its preparation method
A lithium-ion battery, polymer technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve the problems affecting battery cycle performance, loss, electrolyte leakage, etc., to achieve easy industrial implementation, avoid leakage, Simple preparation process
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Embodiment 1
[0023] Under dry conditions, mix 1 mol per liter of lithium hexafluorophosphate electrolytes of ethyl methyl carbonate and ethylene carbonate with acetonitrile, 25 ml each. Weigh 1 gram of polyacrylonitrile and disperse it in 50 ml of the above mixed solution to obtain a uniform solution and apply it on the prepared 1 μm polypropylene solid diaphragm, then heat and volatilize acetonitrile under dry conditions, the colloidal diaphragm is thick 10 μm. Obtain the polymer colloidal electrolyte, insert this electrolyte between the positive electrode and the negative electrode sheet, the composition of the positive electrode is lithium cobaltate, polyhexafluoropropylene, conductive agent acetylene black; the composition of the negative electrode is graphite and polyhexafluoropropylene, and the gel is obtained. The same 8 units are connected in series, then put into the battery case, and packaged to obtain a lithium-ion colloidal battery.
Embodiment 2
[0025] Under dry conditions, the electrolytic solution containing dimethyl carbonate and ethylene carbonate containing 1 mole per liter of lithium hexafluorophosphate and the solvent tetrahydrofuran and N-methylpyrrolidone were mixed, each of the electrolytic solution and the solvent was 5 milliliters. Weigh 1 gram of poly(hexafluoropropylene-1,1 vinylidene fluoride) and polyacrylonitrile and dissolve them in 10 milliliters of the above mixed solution. After obtaining a uniform solution, apply it on the prepared 80 μm thick polyacrylonitrile-containing On the solid separator of propylene and polyethylene, and then heated to volatilize the solvent under dry conditions, the thickness of the colloidal separator is 150 μm, and the polymer gel electrolyte is obtained. This electrolyte is inserted between the positive electrode and the negative electrode sheet. The composition of the positive electrode is cobalt acid Lithium, polyhexafluoropropylene, conductive agent acetylene black;...
Embodiment 3
[0027] Under dry conditions, the electrolytic solution containing dimethyl carbonate, ethylene carbonate and ethylene carbonate containing 1 mole per liter of lithium chlorate is mixed with solvent tetrahydrofuran and acetone, and the mixed solvent ratio is 0.1:0.9. Electrolytic solution, solvent 0.5 ml each. Weigh 1 gram of poly(hexafluoropropylene-1,1 vinylidene fluoride) and polymethyl methacrylate (the ratio of the two polymers is 0.1:0.9) and dissolve it in 1 ml of the above mixed solution to obtain a uniform solution Coating on the obtained 50 μm polyethylene solid separator, and then heating and volatilizing the solvent under dry conditions to obtain a polymer colloidal electrolyte, the thickness of the colloidal separator is 80 μm. Insert this electrolyte between the positive electrode and the negative electrode sheet, the positive electrode is composed of lithium manganate, polytetrafluoroethylene, conductive agent acetylene black; the negative electrode is composed o...
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