Low-temperature solid oxide fuel cells with novel La0.6Sr0.4Co0.8Cu0.2O3-δ perovskite cathode and functional graded anode

Lin Bin, Jinfan Chen, Yihan Ling, Xiaozhen Zhang, Yinzhu Jiang, Ling Zhao, Xingqin Liu, Guangyao Meng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The perovskite La0.6Sr0.4Co0.8Cu0.2O3-δ (LSCCu) oxide is synthesized by a modified Pechini method and examined as a novel cathode material for low-temperature solid oxide fuel cells (LT-SOFCs) based upon functional graded anode. The perovskite LSCCu exhibits excellent ionic and electronic conductivities in the intermediate-to-low-temperature range (400-800 °C). Thin Sm0.2Ce0.8O1.9 (SDC) electrolyte and NiO-SDC anode functional layer are prepared over macroporous anode substrates composed of NiO-SDC by a one-step dry-pressing/co-firing process. A single cell with 20 μm thick SDC electrolyte on a porous anode support and LSCCu-SDC cathode shows peak power densities of only 583.2 mW cm-2 at 650 °C and 309.4 mW cm-2 for 550 °C. While a cell with 20 μm thick SDC electrolyte and an anode functional layer on the macroporous anode substrate shows peak power densities of 867.3 and 490.3 mW cm-2 at 650 and 550 °C, respectively. The dramatic improvement of cell performance is attributed to the much improved anode microstructure that is confirmed by both SEM observation and impedance spectroscopy. The results indicate that LSCCu is a very promising cathode material for LT-SOFCs and the one-step dry-pressing/co-firing process is a suitable technique to fabricate high performance SOFCs.

Original languageEnglish (US)
Pages (from-to)1624-1629
Number of pages6
JournalJournal of Power Sources
Volume195
Issue number6
DOIs
StatePublished - Mar 15 2010

Keywords

  • Cathode
  • Dry-pressing
  • Functional graded anode
  • Low-temperature solid oxide fuel cell
  • Perovskite

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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