Which compounds are used in batteries?

Batteries commonly use compounds such as lithium cobalt oxide (LiCoO2) and lithium iron phosphate (LiFePO4) in lithium-ion batteries, while lead-acid batteries utilize lead dioxide (PbO2) and sponge lead (Pb). Nickel-metal hydride (NiMH) batteries typically contain nickel hydroxide (Ni(OH)2) and a hydrogen-absorbing alloy. Each type of battery employs specific chemical compounds tailored for energy storage and efficiency.