Electrolyte solution and preparation method and application thereof
An electrolytic solution, electron-withdrawing technology, applied in the field of materials
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Embodiment 1
[0061] In a dry environment (relative humidity less than 2%), preferably in an inert gas glove box, anhydrous propylene carbonate (English abbreviation: PC, water content less than 50ppm), dimethyl carbonate (English abbreviation: DMC, water content preferably less than 50ppm) 1 liter each, in a container with a volume greater than 2 liters, mix well at room temperature. 12 g of anhydrous Li 2 O, put into the PC-DMC mixed solvent, then with 410 grams of perfluorinated triphenylboron, the chemical formula is (C 6 f 5 ) 3 B, the number B14 in the present invention is put into the mixed solvent, and it is completely dissolved after stirring at room temperature for 2 hours, that is, the electrolyte solution numbered 1 of the present invention is obtained. Through the standard Pt conductivity cell, adopt the AC impedance method, at different temperatures, measure the total ionic conductivity of this organic electrolytic solution, see the attached result figure 1 with table 1. ...
Embodiment 2-91
[0064] Similar to Example 1, in the glove box or in the drying room, the anhydrous organic solvent is mixed according to a certain volume ratio, and then the Li 2 O or Li 2 o 2 , according to a certain molar concentration into the mixed solvent, and then according to a certain molar concentration of the electron-withdrawing compound is added, stirred at room temperature for 1-5 hours, and dissolved to obtain the organic electrolyte solution of the present invention. See Table 1 for the type of solvent, volume ratio, type of lithium salt, molar concentration, type of electron-withdrawing compound, and molar concentration. The total ionic conductivity and lithium ion migration number are measured in the same manner as in Example 1, and the results are shown in Table 1.
Embodiment 92
[0066] This embodiment is the application of the organic electrolyte solution of the present invention as an electrolyte solution in a rechargeable lithium battery. In this embodiment, the application is tested by a simulated lithium battery that can be charged and discharged. Simulate lithium battery structure such as Figure 7 shown, is the H 2 Assembled in an argon-filled glove box with O content < 1.0ppm. Electrolyte is embodiment 1.
[0067] 99% lithium metal foil is used as the anode. LiFePO 4 The powder is mixed with acetylene black and 5% PVDF cyclohexane solution to form a slurry (the weight percentage of the three after drying is 85:10:5), and evenly coated on the aluminum foil substrate, and the obtained film is 5-40 μm. After drying the obtained film at 1500°C, at 20Kg / cm 2 Press down and continue drying at 1500°C for 12 hours. Then cut the film to an area of 1cm 2 The circular sheet serves as the cathode.
[0068] Will Figure 7 All battery materials, ...
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