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Samarium and Yttrium Codoped BaCeO3 Proton Conductor with Improved Sinterability and Higher Electrical Conductivity

Journal Article


Abstract


  • Acceptor-doped barium cerate is considered as one of the stateof-the-art high temperature proton conductors (HTPCs), and the proton

    conductivity of such HTPCs is heavily dependent on the dopant. In this work,

    a codoping strategy is employed to improve the electrical conductivity and

    sinterability of BaCeO3-based HTPC. BaCe0.8SmxY0.2−xO3−δ (0 ≤ x ≤ 0.2)

    powders are synthesized by a typical citrate−nitrate combustion method. The

    XRD and Raman spectra reveal all the compounds have an orthorhombic

    perovskite structure. The effects of Sm and/or Y doping on the sinterability

    and electrical conductivity under different atmospheres are carefully

    investigated. The SEM results of the sintered BaCe0.8SmxY0.2−xO3−δ pellets

    indicate a significant sintering enhancement with increasing Sm concentration.

    BaCe0.8Sm0.1Y0.1O3−δ exhibits the highest electrical conductivity in hydrogen

    among the BaCe0.8SmxY0.2−xO3−δ pellets. Anode-supported BaCe0.8Sm0.1Y0.1O3−δ electrolyte membranes are also fabricated via a drop-coating process, and the corresponding single cell

    exhibits desirable power performance and durability at low temperatures. The results demonstrate that BaCe0.8Sm0.1Y0.1O3−δ is a

    promising proton conductor with high conductivity and sufficient sinterability for proton-conducting solid oxide fuel cells

    operating at reduced temperatures.

UOW Authors


  •   Shi, Zhen (external author)
  •   Sun, Wenping
  •   Wang, Zhongtao (external author)
  •   Qian, Jing (external author)
  •   Liu, Wei (external author)

Publication Date


  • 2014

Citation


  • Shi, Z., Sun, W., Wang, Z., Qian, J. & Liu, W. (2014). Samarium and Yttrium Codoped BaCeO3 Proton Conductor with Improved Sinterability and Higher Electrical Conductivity. ACS Applied Materials and Interfaces, 6 (7), 5175-5182.

Scopus Eid


  • 2-s2.0-84898474839

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 5175

End Page


  • 5182

Volume


  • 6

Issue


  • 7

Place Of Publication


  • United States

Abstract


  • Acceptor-doped barium cerate is considered as one of the stateof-the-art high temperature proton conductors (HTPCs), and the proton

    conductivity of such HTPCs is heavily dependent on the dopant. In this work,

    a codoping strategy is employed to improve the electrical conductivity and

    sinterability of BaCeO3-based HTPC. BaCe0.8SmxY0.2−xO3−δ (0 ≤ x ≤ 0.2)

    powders are synthesized by a typical citrate−nitrate combustion method. The

    XRD and Raman spectra reveal all the compounds have an orthorhombic

    perovskite structure. The effects of Sm and/or Y doping on the sinterability

    and electrical conductivity under different atmospheres are carefully

    investigated. The SEM results of the sintered BaCe0.8SmxY0.2−xO3−δ pellets

    indicate a significant sintering enhancement with increasing Sm concentration.

    BaCe0.8Sm0.1Y0.1O3−δ exhibits the highest electrical conductivity in hydrogen

    among the BaCe0.8SmxY0.2−xO3−δ pellets. Anode-supported BaCe0.8Sm0.1Y0.1O3−δ electrolyte membranes are also fabricated via a drop-coating process, and the corresponding single cell

    exhibits desirable power performance and durability at low temperatures. The results demonstrate that BaCe0.8Sm0.1Y0.1O3−δ is a

    promising proton conductor with high conductivity and sufficient sinterability for proton-conducting solid oxide fuel cells

    operating at reduced temperatures.

UOW Authors


  •   Shi, Zhen (external author)
  •   Sun, Wenping
  •   Wang, Zhongtao (external author)
  •   Qian, Jing (external author)
  •   Liu, Wei (external author)

Publication Date


  • 2014

Citation


  • Shi, Z., Sun, W., Wang, Z., Qian, J. & Liu, W. (2014). Samarium and Yttrium Codoped BaCeO3 Proton Conductor with Improved Sinterability and Higher Electrical Conductivity. ACS Applied Materials and Interfaces, 6 (7), 5175-5182.

Scopus Eid


  • 2-s2.0-84898474839

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 5175

End Page


  • 5182

Volume


  • 6

Issue


  • 7

Place Of Publication


  • United States