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Analysis of Oxygen Reduction Reaction in Solid Oxide Fuel Cell Using NanoSIMS50L

  • Tokyo Institute of Technology
  • Go Nagasawa
  • Supporter: Miyuki Takeuchi (Nanotechnology Platform Advanced Professional Engineer)

We succeeded in visualizing the oxygen reduction reaction site of a solid oxide fuel cell (SOFC) using the isotope tracer 18O.The active sites of the oxygen reduction reaction and the behavior of oxygen ions at the air electrode and the air electrode/electrolyte interface were clarified.
The results were published in T. Nagasawa and K. Hanamura, J. Power Sources 367, 57 (2017) and T. Nagasawa and K. Hanamura, J. Power Sources 412, 695 (2019).

図. 18in the SOFC air electrode after power generation under O supply18O distribution.　　 　　
A high concentration of18While O was almost uniformly present, there was a distribution of 18O concentration in the LSM part, indicating that the reduction reaction proceeded unevenly.
Adapted from T. Nagasawa and K. Hanamura (2017)