Electrolyte solution and double-ion battery
An electrolyte and dual-ion technology, applied in the field of electrochemistry, can solve the problem that the capacity and cycle performance of anion intercalated graphite electrodes have not been effectively improved, and achieve improved Coulombic efficiency and cycle performance, good anti-oxidation performance, excellent anti-oxidation performance. oxidative effect
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[0042] In the present invention, there is no special limitation on the preparation method of the double-ion battery, and the method for preparing the double-ion battery known to those skilled in the art can be used. The specific steps are preferably: disposing the above-mentioned electrolyte solution in a glove box, and assembling a graphite positive electrode, a negative electrode, a diaphragm and the electrolyte solution into a dual-ion battery.
[0043] Charge and discharge tests are performed on the dual-ion battery provided by the present invention to characterize the capacity and cycle performance of the dual-ion battery. Experimental results show that the dual-ion battery provided by the invention has a capacity of 3mAh / g-110mAh / g, and the capacity retention rate after 700 cycles is 95%.
Embodiment 1
[0047] Configure 1mol / L lithium hexafluorophosphate solution in the glove box, wherein the solvent of the solution is a mixed solvent of methyl isopropyl sulfone and ethyl methyl carbonate, and the volume content of methyl isopropyl sulfone is 20%, the above configuration The good solution was left in the glove box for one day. Using the above solution as the electrolyte, a dual-ion battery was fabricated in a glove box, wherein the positive electrode was graphite, the negative electrode was lithium sheet, and the separator was glass fiber.
Embodiment 2
[0049] Configure 1mol / L lithium hexafluorophosphate solution in the glove box, wherein the solvent of the solution is a mixed solvent of methyl isopropyl sulfone and ethyl methyl carbonate, and the volume content of methyl isopropyl sulfone is 40%, the above configuration The good solution was left in the glove box for one day. Using the above solution as the electrolyte, a dual-ion battery was fabricated in a glove box, wherein the positive electrode was graphite, the negative electrode was lithium sheet, and the separator was glass fiber.
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