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Title: NETL Research and Development - SOFC Materials Development and Degradation Modeling

Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
Report Number(s):
Resource Type:
Resource Relation:
Conference: NETL R&D: SOFC Materials Development and Degradation Modeling Greg Hackett, National Energy Technology Laboratory; Solid Oxide Fuel Cell Project Review Meeting; June 12-14, 2017
Country of Publication:
United States
20 FOSSIL-FUELED POWER PLANTS; 30 DIRECT ENERGY CONVERSION; 42 ENGINEERING; SOFC, Solid Oxide Fuel Cells, Electrode Infiltration, Predictive Modeling

Citation Formats

Hackett, Gregory A. NETL Research and Development - SOFC Materials Development and Degradation Modeling. United States: N. p., 2017. Web.
Hackett, Gregory A. NETL Research and Development - SOFC Materials Development and Degradation Modeling. United States.
Hackett, Gregory A. 2017. "NETL Research and Development - SOFC Materials Development and Degradation Modeling". United States. doi:.
title = {NETL Research and Development - SOFC Materials Development and Degradation Modeling},
author = {Hackett, Gregory A.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 6

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  • A brief overview of materials research being carried out by the National Energy Technology Laboratory to advance fossil energy technologies.
  • None provided
  • Solid oxide fuel cells are emerging as an attractive, clean, and efficient technology for the direct conversion of hydrogen and fossil fuels to electrical energy. The major challenge in developing SOFCs is to develop materials with acceptable electrical, thermal and electrochemical properties that can be synthesized, processed and fabricated as a high-performance fuel cell at low cost. The use of these different chromite, manganite, zirconia and nickel material combinations potentially results in several fabrication and performance-related limitations. The most critical problems are the thermal expansion mismatch between these materials, the low electrical conductivities (primarily of the air electrode) and themore » complex fuel cell fabrication/process steps required. Critical thermal, electrochemical and electrical properties are compromised in order to achieve compatibility between materials and improved fuel cell performance. The objectives of this research are to: develop a broader selection of alternative SOFC current interconnections and air electrode materials with improved electrical, thermal and electrochemical properties leading to enhanced and long-term performance of SOFCs; develop advanced synthesis and fabrication processes for both state-of-the-art La(Sr)CrO{sub 3} and new and alternative materials for use as interconnection and air electrode materials in SOFCs.« less
  • Currently, acceptor-doped lanthanum chromite is the state-of-the-art ceramic interconnect material for high temperature solid oxide fuel cells (SOFCs) due to its fairly good electronic conductivity and chemical stability in both oxidizing and reducing atmospheres, and thermal compatibility with other cell components. The major challenge for acceptor-doped lanthanum chromite for SOFC interconnect applications is its inferior sintering behavior in air, which has been attributed to the development of a thin layer of Cr2O3 at the interparticle necks during the initial stages of sintering. In addition, lanthanum chromite is reactive with YSZ electrolyte at high temperatures, forming a highly resistive lanthanum zirconatemore » phase (La2Zr2O7), which further complicates co-firing processes. Acceptor-doped yttrium chromite is considered to be one of the promising alternatives to acceptor-doped lanthanum chromite because it is more stable with respect to the formation of hydroxides in SOFC operating conditions, and the formation of impurity phases can be effectively avoided at co-firing temperatures. In addition, calcium-doped yttrium chromite exhibits higher mechanical strength than lanthanum chromite-based materials. The major drawback of yttrium chromite is considered to be its lower electrical conductivity than lanthanum chromite. The properties of yttrium chromites could possibly be improved and optimized by partial substitution of chromium with various transition metals. During FY10, PNNL investigated the effect of various transition metal doping on chemical stability, sintering and thermal expansion behavior, microstructure, electronic and ionic conductivity, and chemical compatibility with other cell components to develop the optimized ceramic interconnect material.« less
  • This paper describes proposals on scientific and technical collaborations pertaining to solid oxide fuel cell commercialization. Topics included for discussion are: materials research and manufacture; market estimation and cost; directions of collaboration; and project of proposals on joint enterprise creation.