Zr and Y co-doped perovskite as a stable, high performance cathode for solid oxide fuel cells operating below 500 °C

Zr and Y co-doped perovskite BaCo0.4Fe0.4Zr0.1Y0.1O3−δ (BCFZY0.1) was recently developed as a promising new cathode for protonic ceramic fuel cells (PCFCs). Here, it is applied for the first time as a cathode for low-temperature solid oxide fuel cells (LT-SOFCs). It exhibits large lattice parameters, high oxygen reduction reaction (ORR) activity, exceptional low-temperature performance, long-term stability, and excellent chemical compatability with ceria-based SOFC electrolytes. When BCFZY0.1 is used as the cathode in Ce0.8Gd0.2O2−δ (GDC20)-based SOFCs, it enables a peak power density of 0.97 W cm−2 at 500 °C with 2500 hours stable performance and complete recoverability without any degradation after more than 80 fast thermal ramping cycles. Even at 350 °C, peak power density reaches 0.13 W cm−2. It also shows good H2O and CO2 tolerance.

[1]  E. Wachsman,et al.  Lowering the Temperature of Solid Oxide Fuel Cells , 2011, Science.

[2]  D. Perednis,et al.  Fabrication of thin electrolytes for second-generation solid oxide fuel cells , 2000 .

[3]  Jared W. Templeton,et al.  Lattice Expansion of LSCF-6428 Cathodes Measured by In-situ XRD during SOFC Operation , 2012 .

[4]  Zongping Shao,et al.  A high-performance cathode for the next generation of solid-oxide fuel cells , 2004, Nature.

[5]  Anil V. Virkar,et al.  Stability of BaCeO3‐Based Proton Conductors in Water‐Containing Atmospheres , 1999 .

[6]  K. Kim,et al.  Micro solid oxide fuel cell fabricated on porous stainless steel: a new strategy for enhanced thermal cycling ability , 2016, Scientific Reports.

[7]  Mogens Bjerg Mogensen,et al.  Factors controlling the oxide ion conductivity of fluorite and perovskite structured oxides , 2004 .

[8]  Kui Xie,et al.  A stable BaCeO3-based proton conductor for solid oxide fuel cells , 2009 .

[9]  J. Caro,et al.  In situ high temperature X-ray diffraction studies of mixed ionic and electronic conducting perovskite-type membranes , 2005 .

[10]  H. Koster,et al.  Powder diffraction of the cubic perovskite Ba0.5Sr0.5Co0.8Fe0.2O3−δ , 2003, Powder Diffraction.

[11]  Wenzhao Li,et al.  Promoting effect of YSZ on the electrochemical performance of YSZ+LSM composite electrodes , 1998 .

[12]  Zongping Shao,et al.  Synthesis, characterization and evaluation of cation-ordered LnBaCo2O5+δ as materials of oxygen permeation membranes and cathodes of SOFCs , 2008 .

[13]  Raymond J. Gorte,et al.  Direct oxidation of hydrocarbons in a solid-oxide fuel cell , 2000, Nature.

[14]  L. Singheiser,et al.  Discussion of the complex thermo-mechanical behavior of Ba0.5Sr0.5CO0.8Fe0.2O3-δ , 2010 .

[15]  S. Haile,et al.  Chemical stability and proton conductivity of doped BaCeO3–BaZrO3 solid solutions , 1999 .

[16]  T. Grande,et al.  Anisotropic Chemical Expansion of La1–xSrxCoO3−δ , 2013 .

[17]  Y. Shul,et al.  Tailoring gadolinium-doped ceria-based solid oxide fuel cells to achieve 2 W cm−2 at 550 °C , 2014, Nature Communications.

[18]  T. Ishihara,et al.  Development of double-perovskite compounds as cathode materials for low-temperature solid oxide fuel cells. , 2014, Angewandte Chemie.

[19]  Xuefeng Zhu,et al.  Nanoparticles at Grain Boundaries Inhibit the Phase Transformation of Perovskite Membrane. , 2015, Nano letters.

[20]  Ali Almansoori,et al.  Readily processed protonic ceramic fuel cells with high performance at low temperatures , 2015, Science.

[21]  R. O’Hayre,et al.  A novel wet-chemistry method for the synthesis of multicomponent nanoparticles: A case study of BaCe0.7Zr0.1Y0.1Yb0.1O3−δ , 2013 .

[22]  Zhe Zhao,et al.  Enhanced oxygen reduction activity and solid oxide fuel cell performance with a nanoparticles-loaded cathode. , 2015, Nano letters.

[23]  Fritz B. Prinz,et al.  High-Performance Ultrathin Solid Oxide Fuel Cells for Low-Temperature Operation , 2007 .

[24]  Yamato Asakura,et al.  Prospect of hydrogen technology using proton-conducting ceramics , 2004 .

[25]  Masaharu Hatano,et al.  Ba(Zr0.1Ce0.7Y0.2)O3–δ as an Electrolyte for Low‐Temperature Solid‐Oxide Fuel Cells , 2006 .

[26]  F. Prinz,et al.  Three-dimensional nanostructured bilayer solid oxide fuel cell with 1.3 W/cm(2) at 450 °C. , 2013, Nano letters.

[27]  Andreas Mai,et al.  Performance of LSCF cathodes in cell tests , 2006 .