Product Development for SOFC and SOE Applications

Abstract

Recently Kerafol's alliance with H.C. Starck and the commercial availability of the jointly developed high - output cells with scandium doped zirconia electrolytes was announced. Together the companies are able to provide cells possessing extraordinary performance and long term stability. The combined production facilities meet the increased demand of SOFC stack and system manufacturers. Currently the installation of test benches for MEA characterization is being prepared for quality assurance as well as for development. In addition to cell performance enhancements the emerging topic of electrolysis with solid oxide electrolysis cells (SOEC) will be examined. Because of the fluctuating availability of renewable energy the electrolysis mode of SOFCs to save energy in form of hydrogen during an overproduction and the reverse power generation during periods without wind or sun is of high interest. The first step in a new project examines the feasibility of a SOEC. The next steps include the development of reliable cells with regard to robustness and long term stability. In this paper the status quo of electrolyte supported cells as well as the development project dealing with SOEC at Kerafol is summarized. Additionally the optimization of tape cast, custom-fit glass sealants obtainable from Kerafol for both SOFC and SOEC applications is described. The efforts are focused upon quality improvement, cost reduction and industrial scale manufacturing of sealants.

The Effect of Ni-Modified LSFCO Promoting Layer on the Gas Produced through Co-Electrolysis of CO2 and H2O at Intermediate Temperatures

“…Concerning the possible formation of carbon as a consequence of the chemical (Equation (10)) and electrochemical (Equation ( 13)) reactions, the sum of C species determined in the gas effluent was closed to 100% (see the SI).…”

“…A possible way to achieve this target is the use of solid oxide electrochemical cells (SOECs)-based technology, which has been used for the conversion of H 2 O and CO 2 into syngas at high temperatures [7][8][9]. Currently, commercial SOECs are manufactured with the same materials and architecture as solid oxide fuel cells (SOFCs), simply because of their robustness [10][11][12][13][14]. However, the use of metallic Ni combined with yttria-stabilised zirconia (YSZ) as a fuel electrode (cathode) has an effect on the quality of the outlet gas.…”

High Temperature Co‐electrolysis for Power‐to‐X

“…Two different cells are used: the electrolyte-supported cells (ESC) or the fuel electrode-supported cells known as anode-supported cells (ASC) in fuel cell applications ( Fig. 4) [6][7][8][9]. ESC ( Fig.…”

Development of novel air electrode materials for the SOFC and SOEC technologies

“…As a consequence, 2p-orbitals may effectively overlap with 3d-orbitals of transition metal (B, i.e. Cu) and enable the effective charge transport via double exchange mechanism (B-O-B) [68,69]. A significant influence on the transport properties of the perovskite oxides have both, the degree of filling and the difference of energy between anti-bonding g( o * ) and 2g(π o * ) orbitals.…”

“…A significant influence on the transport properties of the perovskite oxides have both, the degree of filling and the difference of energy between anti-bonding g( o * ) and 2g(π o * ) orbitals. The transfer integral Ip-d is proportional to the cosine of the B-O-B angle, and therefore, the most favorable situation occurs when crystal symmetry is cubic (linear bond) [68,69].…”