Plasma sprayed metal-supported solid oxide fuel cell and stack with nanostructured anodes and diffusion barrier layer.

Plasma sprayed LSGM (La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3 − δ ) based metal-supported solid oxide fuel cells with nanostructured LDC (Ce 0.55 La 0.45 O 2 − δ )–Ni anode and LSCM (La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 − δ ) diffusion barrier layer are developed in our institute. The non-sealed single cell measurement configuration is applied to test the performance and the durability of a prepared 10 × 10 cm 2 cell. The tested cell can deliver the power densities of 543, 480, 352 and 214 mW cm − 2 at 0.6 V for the test temperatures of 800, 750, 700 and 650 °C respectively. Results obtained from long term durability test show that this cell with a porous Ni–Fe metal substrate, a porous LSCM diffusion barrier layer, a porous nano-structured LDC–Ni anode layer, a thin dense LDC isolation layer, a dense crack free LSGM electrolyte layer, a porous LSGM–LSCF (La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 − δ ) cathode interlayer and a porous LSCF cathode current collecting layer has a degradation rate of ~ 2.2% kh − 1 during the test period of 3700 h at conditions of 700 °C and 400 mA cm − 2 current density. The tested 18-cell stack in a sealed configuration shows that it can deliver a power of 606 W at 42.4% fuel utilization, 0.75 V and 800 °C. Each cell in the stack has an open circuit voltage larger than 1 V. [ABSTRACT FROM AUTHOR]