Journal ArticleDOI
A high-performance cathode for the next generation of solid-oxide fuel cells
Zongping Shao,Sossina M. Haile +1 more
TLDR
BSCF is presented as a new cathode material for reduced-temperature SOFC operation and demonstrated that BSCF is ideally suited to ‘single-chamber’ fuel-cell operation, where anode and cathode reactions take place within the same physical chamber.Abstract:
Fuel cells directly and efficiently convert chemical energy to electrical energy. Of the various fuel cell types, solid-oxide fuel cells (SOFCs) combine the benefits of environmentally benign power generation with fuel flexibility. However, the necessity for high operating temperatures (800–1,000 °C) has resulted in high costs and materials compatibility challenges. As a consequence, significant effort has been devoted to the development of intermediate-temperature (500–700 °C) SOFCs. A key obstacle to reduced-temperature operation of SOFCs is the poor activity of traditional cathode materials for electrochemical reduction of oxygen in this temperature regime2. Here we present Ba_(0.5_Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-delta) (BSCF) as a new cathode material for reduced-temperature SOFC operation. BSCF, incorporated into a thin-film doped ceria fuel cell, exhibits high power densities (1,010 mW cm^(-2) and 402 mW cm^(-2) at 600 °C and 500 °C, respectively) when operated with humidified hydrogen as the fuel and air as the cathode gas. We further demonstrate that BSCF is ideally suited to 'single-chamber' fuel-cell operation, where anode and cathode reactions take place within the same physical chamber. The high power output of BSCF cathodes results from the high rate of oxygen diffusion through the material. By enabling operation at reduced temperatures, BSCF cathodes may result in widespread practical implementation of SOFCs.read more
Citations
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Journal ArticleDOI
Ni-doped BaFeO3−δ perovskite oxide as highly active cathode electrocatalyst for intermediate-temperature solid oxide fuel cells
TL;DR: In this paper, a Fe-based perovskite oxide BaFe075Ni025O3−δ (BFNi25) has been prepared by a glycine-nitrate method and evaluated as novel cathode material for solid oxide fuel cells (SOFCs).
Journal ArticleDOI
Review on recent advancement in cathode material for lower and intermediate temperature solid oxide fuel cells application
Muhammad Zaid Ahmad,Sahrim Ahmad,Ruey Shan Chen,Aznan Fazli Ismail,Roshasnorlyza Hazan,Nurul Akidah Baharuddin +5 more
TL;DR: In this article, the electrolyte-layer free fuel cell (EFFC) is introduced as a new type of SOFC that uses natural resources in the fuel cells as a process to reduce its cost.
Journal ArticleDOI
Ex‐Solved Ag Nanocatalysts on a Sr‐Free Parent Scaffold Authorize a Highly Efficient Route of Oxygen Reduction
Jun Hyuk Kim,Jun Kyu Kim,Han Gil Seo,Dae-Kwang Lim,Seung Jin Jeong,Jongsu Seo,Jinwook Kim,WooChul Jung +7 more
Journal ArticleDOI
Electrochemical performance of Pr1−xYxBaCo2O5+δ layered perovskites as cathode materials for intermediate-temperature solid oxide fuel cells
TL;DR: In this article, the effect of Y-doping on the crystal structure, oxygen vacancy concentration, thermal expansion coefficient (TEC), electrical conductivity and cathode performance of Pr1−xYxBaCo2O5+δ was investigated.
Journal ArticleDOI
Application of a thin intermediate cathode layer prepared by inkjet printing for SOFCs
TL;DR: In this paper, a planar solid oxide fuel cell (SOFC) single cell with a double-layered cathode (comprised of a paste painted cathode layer and an inkjet printed interlayer) achieved a maximum power density of 0.71 W/cm2 at 600°C.
References
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Journal ArticleDOI
Materials for fuel-cell technologies
TL;DR: Recent progress in the search and development of innovative alternative materials in the development of fuel-cell stack is summarized.
Journal ArticleDOI
Appraisal of Ce1−yGdyO2−y/2 electrolytes for IT-SOFC operation at 500°C
TL;DR: In this article, the authors evaluated thermodynamic and electrical conductivity data to select the most appropriate electrolyte composition for IT-SOFC operation at 500°C and found that the Gd 3+ ion is the preferred dopant, compared to Sm 3+ and Y 3+, at this temperature.
Journal ArticleDOI
Investigation of the permeation behavior and stability of a Ba0.5Sr0.5Co0.8Fe0.2O3−δ oxygen membrane
TL;DR: In this article, a combined citrate-EDTA complexing method was used for the preparation of SCFO and Ba0.2O3-delta (BSCFO) oxides, and the results of O-2-TPD and XRD showed that the introduction of barium into SCFO could effectively suppress the oxidation of Co3+ and Fe3+ to higher valence states of Co4 and Fe4+ in the lattice and stabilize the perovskite structure under lower oxygen partial pressures.
Journal ArticleDOI
Recent Advances in Materials for Fuel Cells
TL;DR: In this paper, material requirements for SOFC and PEMFC stacks, together with an introductory section on materials technology for reformers, are discussed, and it is concluded that the introduction of alternative materials/processes that would enable SOFC stacks to operate at 150-200°C, and IT-SOFC stacks at 500-700°C would have a major impact on the successful commercialization of fuel cell technology.
Journal ArticleDOI
A low-operating-temperature solid oxide fuel cell in hydrocarbon-Air mixtures
Takashi Hibino,Atsuko Hashimoto,Takao Inoue,Jun-ichi Tokuno,Shin-ichiro Yoshida,Mitsuru Sano +5 more
TL;DR: The performance of a single-chamber solid oxide fuel cell was studied using a ceria-basedsolid electrolyte at temperatures below 773 kelvin, where the solid electrolyte functioned as a purely ionic conductor.