Rare-earth oxide Li0.3Ni0.9Cu0.07Sr0.03O2-delta composites for advanced fuel cells

• Recent development on electrolyte-free fuel cell (EFFC) holding the same function with the traditional solid oxide fuel cell (SOFC) but with a much simpler structure has drawn increasing attention. Herein, we report a composite of industrial grade rare-earth precursor for agriculture and Li0.3Ni0.9Cu0.07Sr0.03O2.a, (RE-LNCS) for EFFCs. Both structural and electrical properties are investigated on the composite. It reveals that the RE LNCS possesses a comparable ionic and an electronic conductivities, 0.11 S cm(-1) and 0.20 S cm(-1) at 550 degrees C, respectively. An excellent power output of 1180 mW cm(-2) has been achieved at 550 degrees C, which is much better than that of the conventional anode/electrolyte/cathode based SOFCs, only around 360 mW cm(-2) by using ionic conducting rare-earth material as the electrolyte. Engineering large size cells with active area of 25 cm(2) prepared by tape-casting and hot-pressing gave a power output up to 12 W. This work develops a new functional single layer composite material for EFFCs and further explores the device functions. 

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering (hsv//eng)

Nyckelord

Low temperature solid oxide fuel

cells Electrolyte-free fuel cell

Rare-earth materials

Ionic-semiconductor composites

Engineering cell

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