Study of Activated Carbon Sheets Used for Air‐Cathodes of Portable Quasi‐Solid Aluminum‐Air Batteries.

The air‐cathode is investigated for the development and optimization of low‐cost, miniaturized, portable, quasi‐solid aluminum‐air batteries. The battery used aluminum as the anode and gelation sodium chloride as the electrolyte. The air‐cathode was activated carbon sheet made of carbon fiber, cellulose, and activated carbon powder. The air‐cathode requires a large surface area. Activated carbon (AC) has the property of porosity and large surface area. In this study, this property was utilized for enhancing the performance of the air‐cathode. The performance of AC sheets with AC ratio in the range of 0–75 wt% was compared. 60 wt% sample generated the highest maximum power density of 3.5 mW/cm−2 with an energy density of 1.0 kWh/kg. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC. [ABSTRACT FROM AUTHOR]