Composition that Enhances Deep Cycle Performance of Valve-Regulated Lead-Acid Batteries filled with Gel Electrolyte

Abstract

Disclosed herein is a composition for use in a negative active material in a valve regulated lead-acid battery, comprising: a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 μm; wherein the amount of carbon material ranges from 0.1 wt % to 1.5 wt % based on the total weight of the composition. Also disclosed herein is valve regulated lead-acid battery, comprising: a positive plate, a negative plate, a separator, and an electrolyte disposed in a container comprising a valve, wherein the negative plate comprises a substrate comprising lead or a lead alloy and a negative active material comprised of a composition comprising a carbon material having a BET surface area from 150 m2/g to 2000 m2/g and having a D90-value greater than 5 μm; wherein the amount of carbon material ranges from 0.1 wt % to 1.5 wt % based on the total weight of the composition.

Dependencies are inferred from the claim text.