Aluminum-Air Fuel Cell/Battery Research

The dismounted Marine requires portable high energy density power sources to power radio communications equipment. The power source should be lightweight to maintain the mobility and effectiveness during combat. Current power needs are met with the LiSO2(BA-5590) primary batteries but there is a need for portable power sources with even higher energy densities. A system which offers a higher energy density is the Aluminum-Air semi-fuel cell system. This Al-Air system can deliver an energy density of 20%higher than the LiSO2 system and allows for transportation in the dry state. This reduces the weight of the power source system further and the system can be activated in the field by the addition of water, when needed.Although this Al-Air system displays a high practical energy density, the theoretical energy density is significantly higher. Through optimized modifications to the Aluminum-alloy anode, the patented oxygen reducing air cathode, electrolyte and to thenecessary processes, it is possible to increase the practical energy density by approximately 10%. The goal of this program is to extend the capability of the Al-air semi-fuel system for use in a wide array of DoD and commercial equipment applications. An Aluminum-air semi-fuel cell power source will provide the DoD with a reliable, safe, environmentally friendly cell with a high-energy storage capability. Other potential commercial applications include portable consumer electronic equipment in thesafety supply market.