scholarly journals Calcium manganite as oxygen electrode materials for reversible solid oxide fuel cell

2015 ◽  
Vol 182 ◽  
pp. 289-305 ◽  
Author(s):  
Chengsheng Ni ◽  
John T. S. Irvine
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Polarization Resistance ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Variable Temperature ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Electrochemical Impedance Spectra

For an efficient high-temperature reversible solid oxide fuel cell (RSOFC), the oxygen electrode should be highly active for the conversion between oxygen anions and oxygen gas. CaMnO3−δ (CM) is a perovskite that can be readily reduced with the formation of Mn3+ giving rise to oxygen defective phases. CM is examined here as the oxygen electrode for a RSOFC. CaMn0.9Nb0.1O3−δ (CMN) with Nb doping shows superior electric conductivity (125 S cm−1 at 700 °C) compared with CM (1–5 S cm−1 at 700 °C) in air which is also examined for comparison. X-ray diffraction (XRD) data show that CM and CMN are compatible with the widely used yttria-stabilized zirconia (YSZ) electrolyte up to 950 °C. Both materials show a thermal expansion coefficient (TEC) close to 10.8–10.9 ppm K−1 in the temperature range between 100–750 °C, compatible with that of YSZ. Polarization curves and electrochemical impedance spectra for both fuel cell and steam electrolysis modes were investigated at 700 °C, showing that CM presented a polarization resistance of 0.059 Ω cm2 under a cathodic bias of −0.4 V while CMN gave a polarization resistance of 0.081 Ω cm2 under an anodic bias of 0.4 V. The phase stability up to 900 °C of these materials was investigated with thermogravimetric analysis (TGA) and variable temperature XRD.

Zn 0.6 Fe 0.1 Cu 0.3 / GDC Composite Anode for Solid Oxide Fuel Cell

2011 ◽  
Vol 8 (3) ◽  
Author(s):  
Rizwan Raza ◽  
Bin Zhu ◽  
Torsten H. Fransson
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Research Effort ◽  
High Resolution Electron Microscopy ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Composite Anode ◽  
Electrochemical Impedance Spectra

Recent research results show that homogeneity and microstructure are very important parameters for the development of low cost materials with better performance for fuel cell applications. This research effort has been contributed in the development of low temperature solid oxide fuel cell (LTSOFC) material and technology as well as applications for polygeneration. The microstructure and electrochemical analyses were conducted. We found a series of new electrode materials which can run solid oxide fuel cell at 300–600°C range with high performances, e.g., a high power density output of 980 mW cm−2 was obtained at 570°C. The fuel cell electrodes were prepared from metal oxide materials through a solid state reaction and then mixed with doped ceria. The obtained results have many advantages for the development of LTSOFCs for polygeneration. The nanostructure of the anode has been studied by high-resolution electron microscopy, the crystal structure and lattice parameters have also been studied by X-ray diffraction. The electrical conductivity of the composite anode was studied by electrochemical impedance spectra.

Study of reversible solid oxide fuel cell with different oxygen electrode materials

2016 ◽  
Vol 41 (46) ◽  
pp. 21802-21811 ◽  
Author(s):  
Guo-Bin Jung ◽  
Chang-Tsair Chang ◽  
Chia-Chen Yeh ◽  
Xuan-Vien Nguyen ◽  
Shih-Hung Chan ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Electrode Materials ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Oxide Fuel

scholarly journals LaxPr4−xNi3O10−δ: Mixed A-Site Cation Higher-Order Ruddlesden-Popper Phase Materials as Intermediate-Temperature Solid Oxide Fuel Cell Cathodes

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 428
Author(s):  
Mudasir A. Yatoo ◽  
Zhihong Du ◽  
Zhang Yang ◽  
Hailei Zhao ◽  
Stephen J. Skinner
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Single Cell ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Solid Oxide ◽  
Cell Performance ◽  
Orthorhombic Symmetry ◽  
Oxide Fuel ◽  
Fuel Cell Performance

Systematic studies of the air electrode and full solid oxide fuel cell performance of La3PrNi3O9.76, and La2Pr2Ni3O9.65 n = 3 Ruddlesden–Popper phases are reported. These phases were found to adopt orthorhombic symmetry with a decrease in lattice parameters on increasing Pr content, consistent with the solid solution series end members. From electrochemical impedance spectroscopy measurements of symmetrical cells, the electrodes were found to possess area specific resistances of 0.07 Ω cm2 for the La2Pr2Ni3O9.65 cathode and 0.10 Ω cm2 for the La3PrNi3O9.76 cathode at 750 °C, representing a significant improvement on previously reported compositions. This significant improvement in performance is attributed to the optimisation of the electrode microstructure, introduction of an electrolyte interlayer and the resulting improved adhesion of the electrode layer. Following this development, the new electrode materials were tested for their single-cell performance, with the maximum power densities obtained for La2Pr2Ni3O9.65 and La3PrNi3O9.76 being 390 mW cm−2 and 400 mW cm−2 at 800 °C, respectively. As these single-cell measurements were based on thick electrolytes, there is considerable scope to enhance over cell performance in future developments.

scholarly journals Differentiation and Decomposition of Solid Oxide Fuel Cell Electrochemical Impedance Spectra

2019 ◽  
Vol 35 (5) ◽  
pp. 509-516 ◽  
Author(s):  
Wangying SHI ◽  
◽  
Chuan JIA ◽  
Yongliang ZHANG ◽  
Zewei Lü ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Electrochemical Impedance ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Impedance Spectra ◽  
Electrochemical Impedance Spectra
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