Which battery technology uses a potassium hydroxide electrolyte?

Which battery technology uses a potassium hydroxide electrolyte?

• A. Nickel-Cadmium
• B. Lead-Acid
• C. Nickel-Metal Hydride
• D. Lithium-Ion

Answer: (A)

Potassium hydroxide indicates an alkaline battery chemistry, where the electrolyte provides hydroxide ions for the redox reactions and remains stable across many charge–discharge cycles. In this setting, the nickel-cadmium system uses an alkaline potassium hydroxide electrolyte to support the cadmium and nickel-based electrode reactions. This combination yields good cycle life, wide temperature tolerance, and robust performance at higher discharge rates—traits that make it a traditional choice for avionics power where reliability and durability are important. By contrast, lead-acid batteries use sulfuric acid as the electrolyte, and lithium-ion cells rely on a non-aqueous organic electrolyte with lithium salts, which is why their electrolyte chemistries differ from potassium hydroxide.

Potassium hydroxide indicates an alkaline battery chemistry, where the electrolyte provides hydroxide ions for the redox reactions and remains stable across many charge–discharge cycles. In this setting, the nickel-cadmium system uses an alkaline potassium hydroxide electrolyte to support the cadmium and nickel-based electrode reactions. This combination yields good cycle life, wide temperature tolerance, and robust performance at higher discharge rates—traits that make it a traditional choice for avionics power where reliability and durability are important. By contrast, lead-acid batteries use sulfuric acid as the electrolyte, and lithium-ion cells rely on a non-aqueous organic electrolyte with lithium salts, which is why their electrolyte chemistries differ from potassium hydroxide.