Technology: Lead-Acid Battery
Due to the electrochemical potentials, water splits into hydrogen and oxygen in a closed lead-acid battery. These gases must be able to leave the battery vessel.
Lead dioxide plays a critical role in the function of lead acid batteries. It serves as the active material in the positive electrode during the battery's charging and discharging cycles. The role of lead dioxide in lead acid batteries encompasses various aspects that affect battery performance and environmental consideration.
Lead–acid batteries contain metallic lead, lead dioxide, lead sulfate and sulfuric acid [1,2,3,6]. The negative electrodes are made of metallic lead containing also minor fractions of e.g., calcium, tin, antimony. The positive electrodes are made of lead oxides in various compositions.
The lead acid battery works well at cold temperatures and is superior to lithium-ion when operating in sub-zero conditions. Lead acid batteries can be divided into two main classes: vented lead acid batteries (spillable) and valve regulated lead acid (VRLA) batteries (sealed or non-spillable). 2. Vented Lead Acid Batteries
In a lead-acid cell the active materials are lead dioxide (PbO2) in the positive plate, sponge lead (Pb) in the negative plate, and a solution of sulfuric acid (H2SO4) in water as the electrolyte. The chemical reaction during discharge and recharge is normally written:
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