Liquid low-sodium silicate electrolyte used for a storage battery and manufactured by magnetization process, and the usage thereof

Abstract

The present invention is related to a liquid low concentration sodium-containing silicate solution as electrolyte for lead-acid storage batteries and its applications. Such an electrolyte is prepared by mixing a silica gel containing 40˜60 wt % SiO, the weight units of such a silica gel are 5˜15; add 15-25 weight units water and stir until the concentration of the mixture is 0.65˜0.85Be' measured by a Baumé densimeter, adjusting the pH value of this mixture to 1-4 using inorganic acid and magnetizing the mixture under 1000-6000 Gauss magnetic field for 5-10 minutes, stir the magnetized mixture until the viscosity of the mixture is less than 0.02 poise and finally obtain a liquid low concentration sodium-containing silicate solution. It can be used as electrolyte or activation solution for common or special lead-acid storage batteries. The lead-acid storage batteries using above electrolyte showed increased specific energy density up to more than 53 W/Kg. The cycle life is increased from 350 cycles for common lead-acid storage batteries to 400 cycles and even more than 1000 cycles for present batteries. Present batteries can be operated properly in a wide temperature range from −50° C.˜+60° C.