Zinc-air batteries

Current Context : Council of Scientific and Industrial Research (CSIR) have developed a battery that functions efficiently in sub-zero temperature.

ABOUT ZINC AIR BATTERIES

• Zinc-air batteries are a type of metal-air battery that uses zinc as the anode and oxygen from the air as the cathode.
• They are known for their high energy density and are used in various applications.

• Components:
  • Anode: Typically made of zinc or a zinc alloy.
  • Cathode: Usually consists of a porous carbon material that allows oxygen to diffuse through and react.
  • Electrolyte: An alkaline electrolyte, often potassium hydroxide (KOH) or sodium hydroxide (NaOH), facilitates the ion transfer between the anode and cathode.
  • Separator: A material that prevents short circuits by separating the anode and cathode while allowing ionic movement.
• Benefits: Portable, flexible, lightweight and can be used in extreme cold conditions.
• Uses : used in hearing aids due to their high energy density and small size, in some medical devices and  small electronics  include backup power systems