Organic electrolytic solution taking gamma-butyrolactone as basic solvent

Abstract

The invention discloses an organic electrolytic solution taking gamma-butyrolactone as a basic solvent. The organic electrolytic solution comprises a catenulate quaternaries main electrolyte, a mixedsolvent and a flame retardant additive, wherein the mixed solvent comprises the following components by weight proportion: 30-45 parts of gamma-butyrolactone, 15-25 parts of ethyl trifluoroacetate, 10-15 parts of 1,3-dioxolane-2-ketone, 10-20 parts of ethylene carbonate and 10-20 parts of methyl ethyl carbonate. The organic electrolytic solution replaces the traditional polycarbonate ammonium saltwith tetraethyl ammonium tetrafluoroborate, so that a battery has good low-temperature performance; the change of various electric parameters of the electrolytic solution is obviously small after 500h storage at 115 DEG C high temperature, so that the high-temperature service life of the electrolytic solution is long; and the methyl ethyl carbonate is added, so that the low-temperature conductivity and the low-temperature performance of the electrolytic solution can be improved.

Description

technical field [0001] The invention relates to the technical field of electrolytes, and more specifically relates to an organic electrolyte with gamma-butyrolactone as a base solvent. Background technique [0002] An aluminum electrolytic capacitor is a capacitor made of an aluminum cylinder as the negative electrode, which is filled with a liquid electrolyte, and a bent aluminum strip is inserted as the positive electrode. The capacitor is called an aluminum electrolytic capacitor; Expected capacitance, electrolyte The electrolyte is the actual cathode of the aluminum electrolytic capacitor, which plays an important role in providing oxygen ions and repairing the anodic oxide film. At present, the application field of aluminum electrolytic capacitors is obviously limited by the working temperature range, and does not have Provide suitable discharge performance in a wide temperature range; if the temperature is too low, the capacity of the capacitor will decrease, and it wi...

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Problems solved by technology

[0002] An aluminum electrolytic capacitor is a capacitor made of an aluminum cylinder as the negative electrode, which is filled with a liquid electrolyte, and a bent aluminum strip is inserted as the positive electrode. The capacitor is called an aluminum electrolytic capacitor; Expected capacitance, electrolyte The electrolyte is the actual cathode of the aluminum electrolytic capacitor, which plays an important role in providing oxygen ions and repairing the anodic oxide film. At present, the application field of aluminum electrolytic capacitors is obviously limited by the working temperature range, and does not have Provide suitable discharge performance in a wide temperature range; if the temperature is too low, the capacity of the capacitor will decrease, and it will not even be enough to provide sufficient DC support for the power supply. Generally, the electrolyte should have better low temperature performance, so high-performance electrolyte is essential for ensuring Aluminum electrolytic capacitors play a vital role; in addition, in hot summer weather, the capacitors of charging piles are also required to have better temperature control performance, which puts forward higher requirements for the electrolyte

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