An all-solid-state carbon-air battery reaching an output power over 10 W and a specific energy of 3600 Wh kg?1

A uniquely designed mechanically rechargeable all-solid-state carbon-air battery stack, with extremely high specific energy and power density, shows great promise for applications in portable supplies small stations. • unique performance battery. The based on long electrolyte tube has anode inside cathode outside. Current from is efficiently collected through holes along tube. Battery stack formed by connecting single batteries series. 3-cell-stack gives output 11 W 3600 Wh kg ?1 . Carbon-air have a very theoretical energy. However, they not been given sufficient attention because of the challenges associated optimizing design making it rechargeable. Here we report novel solid oxide which enables operating temperature. composed tubular membrane electrode assembly (MEA), layer sandwiched between two porous electrodes, carbon powder filled MEA By introducing row length direction current collection, can be significantly enhanced shortened paths. using removable quartz plug to stuff open end tube, becomes Several assembled into electrical series collection. 3-battery-stack at 800 °C displays an 11.0 W, corresponding ~ 160 mW cm ?2 With overall 10 g, discharges 0.5 2.75 V 26 h, revealing , higher than those state-of-the-art metal-air batteries.