Gel electrolyte capable of prolonging service life of lead-acid battery

Abstract

The invention discloses gel electrolyte capable of prolonging the service life of a lead-acid battery. The gel electrolyte contains the following raw materials in percentage by weight: 0.1 to 0.5 percent of polyethylene glycol, 0.1 to 1 percent of stannous sulfate, 0.5 to 1.5 percent of sodium sulfate, 0.5 to 1 percent of phosphoric acid, 0.05 to 2 percent of an organic silicon polymer, 0.5 to 8 percent of fumed silica, 35 to 45 percent of sulfuric acid and the balance being de-ionized water. According to the gel electrolyte, the polyethylene glycol is used as a colloid stabilizer and can prevent colloids from being gelled or agglomerated before being filled into the battery and enhance the stability of the colloids to form a stable three-dimensional mesh structure; the stannous sulfate can be oxidized into stannic tin to improve the electrical conductivity of an active substance and the recharging capability of the battery which is discharged; the sodium sulfate can provide a certain quantity of sulfate radicals for electrochemical reaction in the electrolyte to reduce the degree of supersaturation of lead sulfate crystals; silicon-oxygen bonds and hydrogen bonds in the organic silicon polymer can effectively reduce the softening speed of the active substance, inhibit the passivation of the active substance on the surface layer and prolong the service life of the battery.

Description

technical field

[0001] The invention belongs to the field of lead-acid batteries, and in particular relates to a colloidal electrolyte capable of improving the service life of lead-acid batteries. Background technique

[0002] Since the lead-acid battery was invented in 1859, it has been used in many fields such as electric power, transportation, communications, automobiles, and railways because of its wide range of raw materials, low price, reliable performance, and wide applicable temperature range. After more than 100 years of technological innovation, battery energy density, cycle life and high-current discharge capacity have been continuously improved, and currently it still has the largest market share in the field of chemical power sources. The main structure of the lead-acid battery is composed of positive electrode, negative electrode, electrolyte, diaphragm, shell, safety valve, terminal and other components. Part of the electrolyte in the valve-regulated lead-aci...