Low catalyst loading gas diffusion membrane electrodes have been developed for spaceflight qualified nickel-hydrogen (NiH2) batteries. These electrodes involve the use of new electrode designs and innovative manufacturing methods. Supported catalysts, mixed catalysts and alternative catalyst systems have been developed to decrease catalyst loading levels, and therefore reduce electrode cost, without reducing performance or reliability. This advanced electrode technology has currently accumulated more than 13,000 charge/discharge cycles in real-time, low-earth-orbit (LEO) testing. The technology has been incorporated into several nickel-hydrogen spaceflight programs including the TUBSAT B spacecraft, built by the Technical University of Berlin and launched in January of 1994 aboard a Russian Cyclone rocket.