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Solution Preparation of Li(Co,Fe)O2 Coatings for Molten Carbonate Fuel Cell Components
Authors:Chen  W  Klein  LC  Huang  C
Institution:(1) Ceramic & Materials Engineering, Rutgers-the State University of New Jersey, 607 Taylor Road, Piscataway, NJ 08854-8065, USA;(2) Evercel, Inc., 3 Great Pasture Road, Danbury, CT 06813-1305, USA
Abstract:An aqueous solution process has been used for dip coating onto substrates of 316L stainless steel. Coatings of LiCoO2, Li(Co0.5Fe0.5)O2 and LiFeO2 were applied and heat treated to 650°C for 3 hrs. Thermal analysis, X-ray diffraction analysis, and SEM analysis were carried out to characterize the microstructure of the coatings. Results showed that the coatings transformed from a gel to a porous, crystalline layer between 270 and 350°C. Microhardness measurements at low load (50 g) were used as an indication of the surface coverage. Samples subjected to 10 thermal cycles at 10°C/min to 650°C and back to ambient, to simulate use in a molten carbonate fuel cell, showed no decrease in microhardness.
Keywords:lithium cobalt oxides  lithium iron oxides  aqueous solution processing  molten carbonate fuel cells  stainless steel current collector
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