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

Tutkimustuotos: Lehtiartikkeli

Tutkijat

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

Organisaatiot

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

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut103-109
Sivumäärä7
JulkaisuJournal of Power Sources
Vuosikerta425
TilaJulkaistu - 15 kesäkuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 33282399