Lithium-sulfur flow battery and positive electrode electrolyte thereof, as well as preparation method of positive electrode electrolyte
A lithium-sulfur flow battery and cathode electrolyte technology, which is applied in battery electrodes, fuel cells, secondary batteries, etc., can solve the problems of increased electrolyte concentration and viscosity on the positive electrode side, and prevent capacity fading and prevent capacity fading Effect
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[0055] Table 1 Differences in each embodiment
[0056]
[0057] In the embodiment of the present invention, according to the order described in the description, the first step is to prepare the electrolyte, wherein the solvent is selected from ethylene glycol dimethyl ether (DME, 99%, Aldrich) and 1.3-dioxolane (DOL, 99.8%, Aldrich) Mix according to the volume ratio of 1:1, and stir for 36h to form the electrolyte solute. Using lithium trifluoromethanesulfonate (LiSO 3 CF 3 , 99.95%, Aldrich) as a solute, dissolved in the prepared mixed solvent, the electrolyte concentration of different examples is shown in Table 1. In the second step, use the negative electrode electrolyte prepared in step 1, introduce lithium and sulfur according to the material mass ratio of 1:4, stir in the mixed solvent for 48 hours until the solids are completely reacted and dissolved, forming dark brown Li 2 S 8 Solution, the concentration of the solution is shown in Table 1. Weigh the liquid and the nan...
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