Masters Theses

Keywords and Phrases

Comparison of NTN and SS441; Impedance spectroscopy; NTN interconnect; Solid Oxide Fuel Cells

Abstract

"With increasing importance for clean energy, fuel cells have gained great significance in recent decades. Solid oxide fuel cells are easy to transport due to presence of solid electrolyte and also have requisite electrical properties,but have been obstructed by their limitation to be used at only temperatures greater than 600⁰C and less than 800⁰C. To construct a stack of cells, materials that are good electrical conductors and having necessary mechanical strengths at that temperatures are being considered as interconnects between the cells. Evaluation of Nickel-Titanium dioxide-Niobium pentoxide (NTN) as interconnect and comparison to Stainless Steel 441 alloy has been made in this research. The criteria for evaluation are the resistance, long-term stability and the power density characteristics of the cell for each interconnect. Electrical measurements by impedance spectroscopy techniques were conducted at various working temperatures using a gas mixture of 10 % hydrogen and 90% nitrogen to evaluate both interconnect materials in the working range of fuel cells. Scanning Electron Microscopy images of Lanthanum Strontium Manganite paste before and after the fuel cell measurements are shown.The results showed that both NTN and Stainless Steel 441 interconnects exhibit similar electrical properties under operating conditions of the fuel cell. Since the NTN interconnect is less prone to corrosion and does not have the effect of chromium poisoning, it can be considered as a viable interconnect material for solid oxide fuel cells."--Abstract, page iii.

Advisor(s)

Dogan, Fatih

Committee Member(s)

Brow, Richard K.
Miller, F. Scott, 1956-

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Materials Science and Engineering

Sponsor(s)

Missouri University of Science and Technology. Energy Research Development Center

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2015

Pagination

ix, 53 pages

Note about bibliography

Includes bibliographic references (pages 47-52).

Rights

© 2015 Abhijith Budur, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Impedance spectroscopy
Solid oxide fuel cells
Ceramic materials
Composite materials

Thesis Number

T 10734

Electronic OCLC #

921184703

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