Abstract：A novel fuel-to-electricity conversion technology resembling a fuel cell has been developed

based on the perovskite solar cell principle using a perovskite, e.g. La0.6Sr0.4Co0.2Fe0.8O3
δ and

an ionic nanocomposite material as a core functional layer, sandwiched between n- and pconducting

layers. The conversion process makes use of semiconductor energy bands and

junctions properties. The physical properties of the junction and alignment of the semiconductor

energy band allow for direct ion transport and prevent internal electronic shortcircuiting,

while at the same time avoiding losses at distinct electrolyte/electrode interfaces

typical to conventional fuel cells. The new device achieved a stable power output of

1080 mWcm
2 at 550 1C in converting hydrogen fuel into electricity