Enhanced activity and stability of Sr 2 FeMo 0.65 Ni 0.35 O 6-δ anode for solid oxide fuel cells with Na doping

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Tongtong Yao
  • Nianjun Hou
  • Juanjuan Gan
  • Jun Wang
  • Xiaojing Zhi
  • Lijun Fan
  • Tian Gan
  • Yicheng Zhao
  • Yongdan Li

Research units

  • Tianjin University
  • Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

Abstract

Sr 2-x Na x FeMo 0.65 Ni 0.35 O 6-δ is synthesized as an anode material for solid oxide fuel cells. The effects of Na on the crystalline phase and electrical properties are investigated. The main perovskite phase changes into a Ruddlesden-Popper structure after reduction when x is less than 0.1, while the material with a higher amount of Na keeps the perovskite structure. FeNi x alloy nanoparticles are exsolved during reduction, in which the content of Ni increases with the rise of Na amount. The surface oxygen vacancy concentration is also influenced by the doping of Na, and the highest value is reached when x is 0.1. Sr 1.9 Na 0.1 FeMo 0.65 Ni 0.35 O 6-δ anode exhibits the highest activity, and a single cell supported by a 300-μm-thick La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ electrolyte layer shows maximum power densities of 1495 and 627 mW cm −2 at 850 °C with H 2 and wet CH 4 as fuels, respectively. The coking resistance of the anode is also improved with Na doping.

Details

Original languageEnglish
Pages (from-to)103-109
Number of pages7
JournalJournal of Power Sources
Volume425
Publication statusPublished - 15 Jun 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Anode, Double perovskite, Methane, Sodium doping, Solid oxide fuel cell

ID: 33282399