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Researchers in Japan have developed a palm-sized microreactor using solid oxide fuel cells (SOFC) that can reach a working temperature of 600 °C within five minutes. This portable reactor is designed to power high-demand edge devices such as drones, robots, and artificial intelligence hardware.

The SOFC technology offers energy densities up to four times greater than conventional lithium-ion batteries by converting hydrogen-rich fuels directly into electricity. A novel 'scaffold' design minimizes thermal conductivity and prevents cracking, using yttria-stabilized zirconia (YSZ) as a protective casing with integrated microchannels for fuel and water flow.

This microreactor can enable drones to fly for hours and provide consistent energy for real-time computing in portable AI hardware. Additionally, if the device's insulation is compromised, it can cool quickly, reducing fire hazards by bringing the reactor to a safe temperature.