Nanostructured MIEC Ba0.5Sr0.5Co0.6Fe0.4O3-delta (BSCF5564) cathode for IT-SOFC by nitric acid aided EDTA-citric acid complexing process (NECC)

作者：Moharil Sanjeev V; Nagrare Bhagyashree S^*; Shaikh Shabana P S

来源：International Journal of Hydrogen Energy, 2012, 37(6): 5208-5215.

DOI：10.1016/j.ijhydene.2011.12.059

• Mixed ionic electronic conductor
• Solid oxide fuel cell
• Ba0.5Sr0.5Co0.6Fe0.4O3-delta(BSCF5564)
• Scanning electron microscopy
• 4-Probe DC conductivity

Ba0.5Sr0.5Co0.6Fe0.4O3-delta(BSCF5564) was synthesized by nitric acid aided EDTA citric acid complexing sol-gel method (NECC). Both, the phase formation temperature and time of BSCF5564 synthesized NECC were found to be low i.e. single perovskite phase formation temperature is 200 degrees C less as compared to the conventional method of synthesis. The orthorhombic perovskite structure has been formed after calcination at 800 degrees C for 5 h. Scanning electron microscopy reveals the formation of porous material constituting nanosized and irregularly shaped rod-like structure with particle size approximately ranges from 90 to 160 nm. The total weight loss of the BSCF5564 sample comes out to be 6.6%, indicating that quadrivalence state Co4+ and Fe4+ in the sample have been completely reduced to the trivalent state Co3+ and Fe3+ due to thermal analysis. The value of E-a for BSCF5564 prepared by NECC was 0.2288 eV. The electrical conductivity of BSCF5564 synthesized by NECC is observed to be steady at high temperature (above 700 degrees C).

• 出版日期2012-3