Electrode active material for lead-acid storage battery

Abstract

The invention discloses an electrode active material for a lead-acid storage battery. The electrode active material comprises lead powder and a non-metallic titanium compound; the lead powder comprises one or more kinds of metal lead powder, ball-milling lead powder, Barton lead powder, Pb<2>O powder, PbO powder, Pb<2>O<3> powder, Pb<3>O<4> powder and PbO<2> powder; and the non-metallic titanium compound comprises one or more kinds of titanium sulfide, titanium nitride, titanium boride, titanium carbide, titanium hydride, titanium hydroxide, titanium silicide, a symbiotic blend of the abovementioned compounds on an atomic micro level or atomic cluster level, and doped compounds formed by doping the abovementioned compounds with one or more kinds of F, Sb, Sn, Ca, Bi, Co, Ca, Al, Mg, N, P, O and C. By virtue of the electrode active material for the lead-acid storage battery with an improved formula, the specific power, specific energy, charging-discharging efficiency, cycle life, low-temperature performance and the like of the lead-acid storage battery can be obviously improved.

Description

technical field [0001] The invention relates to the field of lead-acid batteries, in particular to electrode active materials of lead-acid batteries. Background technique [0002] The active material of the lead-acid battery is closely related to the performance of the lead-acid battery, which affects or even determines the specific power, specific energy, high-current discharge capacity, charging efficiency, and cycle life of the lead-acid battery. The preparation and application of the active material of the current lead-acid battery have enabled the lead-acid battery to obtain relatively practical and good performance. Generally, by adding some common conductive agents, dispersants, expansion agents, etc. to the active material, 30%-60% utilization rate of positive and negative active materials and better charging efficiency can be obtained, and it can also make sulfate , softening and falling off of positive active material, early capacity loss and other problems have b...

AI Technical Summary

Problems solved by technology

Generally, by adding some common conductive agents, dispersants, expansion agents, etc. to the active material, 30%-60% utilization rate of positive and negative active materials and better charging efficiency can be obtained, and it can also make sulfate , softening and falling off of positive active material, early capacity loss and other problems have been more or less controlled or alleviated, but there are still considerable room for improvement and problems, such as active material utilization, charging efficiency, large current discharge capacity and positive active material The control of softening and shedding is not ideal. The carbon-based conductive agent is easily oxidized and consumed in the positive electrode, and has a low hydrogen evolution overpotential in the negative electrode. The titanium oxide additive TiO 2 Titanium oxide (TiO) with poor conductivity and good conductivity 4 o 7 ) The preparation conditions are so high that quality products are hard to come by, etc.

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