A rational design of highly active and coke-resistant anode for methanol-fueled solid oxide fuel cells with Sn doped Ni-Ce0.8Sm0.2O2−δ

Tian Gan, Hexuan Song, Xinqiang Fan, Ye Liu, Shouqing Liu, Yicheng Zhao*, Yongdan Li*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
51 Downloads (Pure)

Abstract

A crucial challenge in the commercialization of Ni-based materials as the anode of solid oxide fuel cell is the fast voltage drop due to carbon deposition and structural degradation during cell operation. Herein, Sn-doped Ce0.8Sm0.2O2−δ (SDC) supported Sn-Ni alloy anode is rationally designed and prepared, via a simple and convenient dual-modification strategy. The substitution of Sn of Ce in the oxide phase enhances the mobility of lattice oxygen in SDC. Meanwhile, Sn exsolves partially from the oxide phase and forms Ni3Sn and Ni3Sn2 intermetallic compounds with Ni after reduction. The composite anode thus formed achieves unprecedent activity in the electrochemical oxidation of H2 and CH3OH. The maximum power densities of a cell supported by 500 μm-thick Ce0.8Sm0.2O2−δ-carbonate electrolyte layer with the Ni-Ce0.7Sn0.1Sm0.2O2−δ (Ni-SSn10DC) anode reach 1.99 and 2.11 W cm−2 at 700 °C, respectively for using H2 and methanol as fuels. The doping of Sn also remarkably enhances the coking resistance of the anode. This work opens a path on the design of high-performance SOFC anode.
Original languageEnglish
Article number140692
Number of pages8
JournalChemical Engineering Journal
Volume455
Early online date29 Nov 2022
DOIs
Publication statusPublished - 1 Jan 2023
MoE publication typeA1 Journal article-refereed

Keywords

  • Ni-Sn intermetallic compounds
  • Doped ceria
  • Methanol fuel
  • Anode
  • Solid oxide fuel cell

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