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Title: Crystal growth of {gamma}-lithium aluminate in molten Li/K carbonates

Abstract

The electrolyte tile of molten carbonate fuel cells consists of a matrix prepared from lithium aluminate powders impregnated with molten alkaline metal carbonate. The increase in lithium aluminate particle size in the molten carbonate accelerated degradation of the electrolyte tile. The authors investigated the mechanism of lithium aluminate particle growth. Results indicate that, although the particles basically grow through a dissolution-precipitation mechanism, with lithium aluminate passing through the molten carbonate, growth tends to occur readily in the interior of agglomerates resulting from the coagulation of fine particles. As fine pores fill fully with lithium aluminate precipitate in the interior of the agglomerates, and then are amalgamated into other surrounding particles, the particles can grow at higher rates than individual particles, which grow by the dissolution-precipitation mechanism.

Authors:
; ; ;  [1]
  1. Tokyo Electric Power Co., Inc., Yokohama (Japan). Energy and Environment research and Development Center
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
404634
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 143; Journal Issue: 9; Other Information: PBD: Sep 1996
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; MOLTEN CARBONATE FUEL CELLS; MATRIX MATERIALS; ALUMINATES; PRECIPITATION; LITHIUM COMPOUNDS; LITHIUM CARBONATES; POTASSIUM CARBONATES

Citation Formats

Murai, M, Takizawa, K, Soejima, K, and Sotouchi, H. Crystal growth of {gamma}-lithium aluminate in molten Li/K carbonates. United States: N. p., 1996. Web. doi:10.1149/1.1837106.
Murai, M, Takizawa, K, Soejima, K, & Sotouchi, H. Crystal growth of {gamma}-lithium aluminate in molten Li/K carbonates. United States. doi:10.1149/1.1837106.
Murai, M, Takizawa, K, Soejima, K, and Sotouchi, H. Sun . "Crystal growth of {gamma}-lithium aluminate in molten Li/K carbonates". United States. doi:10.1149/1.1837106.
@article{osti_404634,
title = {Crystal growth of {gamma}-lithium aluminate in molten Li/K carbonates},
author = {Murai, M and Takizawa, K and Soejima, K and Sotouchi, H},
abstractNote = {The electrolyte tile of molten carbonate fuel cells consists of a matrix prepared from lithium aluminate powders impregnated with molten alkaline metal carbonate. The increase in lithium aluminate particle size in the molten carbonate accelerated degradation of the electrolyte tile. The authors investigated the mechanism of lithium aluminate particle growth. Results indicate that, although the particles basically grow through a dissolution-precipitation mechanism, with lithium aluminate passing through the molten carbonate, growth tends to occur readily in the interior of agglomerates resulting from the coagulation of fine particles. As fine pores fill fully with lithium aluminate precipitate in the interior of the agglomerates, and then are amalgamated into other surrounding particles, the particles can grow at higher rates than individual particles, which grow by the dissolution-precipitation mechanism.},
doi = {10.1149/1.1837106},
journal = {Journal of the Electrochemical Society},
number = 9,
volume = 143,
place = {United States},
year = {1996},
month = {9}
}