Boric acid glycerin polyester-doped aluminum eletrolytic capacitor electrolyte and preparation method thereof

Abstract

The invention discloses a boric acid glycerin polyester-doped aluminum eletrolytic capacitor electrolyte, which is prepared by the following raw materials, by mass percentage, 4% to 7% of ammonium sebacate, 50% to 75% of ethylene glycol, 17% to 24% of diethylene glycol, 1% to 5% of dioctyl sebacate, 1% to 10% of boric acid glycerin polyester, 2% to 3% of water, 0.2% to 0.5% of mannitol, 0.3% to 0.5% of ammonium hydrogen azelate, 0.8% to 1.2% of a binder, and 0.2% to 0.8% of ammonium pentaborate. The preparation method comprises the following steps: (1) the ethylene glycol, the water and the boric acid glycerin polyester are heated to 60 DEG C and the heat is preserved for 0.5 h; 2) the temperature rises to 60 DEG C to 85 DEG C, the diethylene glycol and the ammonium hydrogen azelate are added; 3) the temperature rises to 130 DEG C within a certain time and the heat is preserved for 1 h, and the ammonium sebacate, the mannitol, the binder, the ammonium pentaborate and the dioctyl sebacate are added; and 4) the temperature falls to 95 DEG C to 105 DEG C, the heat is preserved for 1 h, and cooling to a room temperature in the air is carried out to obtain the electrolyte. The electrolyte has high conductivity and high sparking voltage, the electrolyte can resist sparking voltage of 508.5 DEG C, and the conductivity reaches 3.1*10<-3>S / cm.

Description

technical field [0001] The invention relates to an electrolytic solution for an aluminum electrolytic capacitor, in particular to an electrolytic solution for an aluminum electrolytic capacitor doped with boric acid glycerol polyester and a preparation method thereof. Background technique [0002] The electrolyte is an important raw material for the manufacture of aluminum electrolytic capacitors, and the composition of the electrolyte directly determines the performance of the capacitor; at present, in various electronic devices, the aluminum electrolytic capacitors used have always emphasized the advantages of high voltage, wide temperature, and high temperature resistance, ignoring the conductivity Efficiency is a more important element; if the conductivity is too low, it is easy to cause ESR value, that is, the impedance is particularly high, which cannot meet the needs of existing capacitor products. Therefore, a capacitor with high conductivity, low impedance, high flas...

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Problems solved by technology

[0004] In order to solve the problem that the existing electrical conductivity is too low and the electrical conductivity cannot be increased while the flashover voltage is not reduced or even increased, the present invention discloses an aluminum electrolytic capacitor with high electrical conductivity, that is, low impedance and high flashover voltage. The electrolyte is an electrolyte for aluminum electrolytic capacitors doped with boric acid glycerol polyester and its preparation method. Boric acid glycerol polyester is low in cost and can be made from only a few existing raw materials. Ordinary technicians in this field can easily obtained

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