Low-temperature co-sintering of co-ionic conducting solid oxide fuel cells based on Ce0.8Sm0.2O1.9-BaCe0.8Sm0.2O2.9 composite electrolyte

Dong Tian, Wei Liu*, Yonghong Chen, Qinwen Gu, Lin Bin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A composite electrolyte Ce0.8Sm0.2O1.9-BaCe0.8Sm0.2O2.9 (SDC-BCS) material for co-ionic conducting solid oxide fuel cells was prepared by microwave-assisted sol-gel technique. The crystallization, morphology, and sintering characteristics were investigated by X-ray diffraction and scanning electron microscopy. The obtained SDC-BCS composite electrolyte powders distribute uniformly, and SDC and BCS crystalline grains play a role as matrix for each other in the composite electrolyte. Anode-supported solid oxide fuel cells of NiO-Ce0.8Sm0.2O1.9/Ce0.8Sm0.2O1.9-BaCe0.8Sm0.2O2.9/Ce0.8Sm0.2O1.9-SrCo0.9Ti0.1O2.55 (NiO-SDC/SDC-BCS/SDC-SCT) were fabricated based on the nanocomposite electrolyte powders. The electrochemical performances were tested at 500–650 °C using humidified hydrogen as fuel. Results demonstrated that the anode-supported half cells could be sintered at 1,300 °C with a dense electrolyte layer and a porous anode structure. Moreover, the single cell with 40-μm-thick electrolyte layer achieved an open-circuit voltage (OCV) of 0.77 V and a maximum power density of 621 mW cm−2 at 650 °C.

Original languageEnglish (US)
Pages (from-to)823-828
Number of pages6
JournalIonics
Volume21
Issue number3
DOIs
StatePublished - Jan 1 2015

Keywords

  • CeSmO-BaCeSmO
  • Co-ionic conduction
  • Electrolyte
  • Low-temperature co-sintering
  • Solid oxide fuel cells

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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