4.5 Article

Anode supported planar 5 x 5 cm2 SrZr0.5Ce0.4Y0.1O2.95 based solid oxide protonic fuel cells via sequential tape-casting

期刊

SOLID STATE IONICS
卷 379, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.ssi.2022.115918

关键词

Ceramic proton conductors; Planar electrochemical cell; Gas-tight solid oxide protonic electrolyte; Protonic fuel cell; Inverse/sequential tape casting

资金

  1. JSPS KAKENHI [19K05672]
  2. NEDO [20001458-0]
  3. Federal Ministry of Education, and Research BMBF, Germany [03SF0555A]
  4. Helmholtz Association of German Research Centres, Germany, through the MTET Program
  5. International Institute for Carbon-Neutral Energy Research (I2CNER) - World Premier International Research Center Initiative (WPI), MEXT Japan
  6. Grants-in-Aid for Scientific Research [19K05672] Funding Source: KAKEN

向作者/读者索取更多资源

Solid oxide protonic fuel cells are efficiently converted stored chemical energy to usable electrical energy. This paper presents a cost-effective method for fabricating large-sized planar protonic fuel cells using inverse tape casting and screen printing. The cells exhibited defect-free single cells with suitable density and gas-tight electrolyte layers. The electrochemical performance of the cells based on SrZr0.5Ce0.4Y0.1O2.95 was evaluated and showed promising results.
Solid oxide protonic fuel cells are one of the most efficient means of directly converting stored chemical energy to usable electrical energy. Acceptor-doped Ba(Zr, Ce)O-3 perovskite-type oxides are the preferred electrolyte choice as they provide higher conductivity due to lower activation energy. While substantial progress has been made on small-sized protonic laboratory-scale cells, a considerable challenge has been upscaling robust planar-type devices. This paper employs a cost-effective inverse tape casting route and screen printing to fabricate flat planar anode-supported protonic fuel cells consisting of NiO-SrZr0.5Ce0.4Y0.1O3-delta substrate, SrZr0.5Ce0.4Y0.1O3-delta electrolyte, and BaCo0.4Fe0.4Zr0.1Y O-0.1(3-delta) as the cathode. The processing parameters were analyzed and adjusted to obtain defect-free single cells of dimension up to 100 mm x 100 mm x 0.5 mm with diminished warping. In addition, the smooth tri-layered green tapes yielded suitably dense and gas-tight electrolyte layers after co sintering at 1300 degrees C/5 h. Finally, the electrochemical performance of the 50 x 50 mm(2) SrZr0.5Ce0.4Y0.1O2.95 based cells was evaluated, and their impedance spectra were deconvoluted to identify all performance-related polarization processes via the distribution of relaxation time.

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