FABRICATION AND CHARACTERISTICS OF POROUS Ni AND NiO(Li) CATHODES FOR MCFC

Park HH; Jang CI; Shin HS; Lee KT

Korean Journal of Chemical Engineering, Vol.13, No.1, 35-39, January, 1996

In situ Ni and ex-situ NiO(Li) cathodes were fabricated by cold pressing using Ni powder and Li₂CO₃(in case of ex-situ cathode) with paraffin wax as a binder. The effects of compaction pressure, amount of binder, and sintering temperature on porosity, the average size of pore, Li⁺cation fraction, and the fracture strength were investigated in this study. The optimum compaction pressure was 100kg/cm² to prevent the brittleness and stress concentration caused by high compaction pressure. Also, 10wt%. To obtain reasonably high electric conductivity in ex-situ cathode, the sintering temperature was chosen to be below 950℃ to maintain the cation fraction of Li⁺ is in the range of 0.02-0.06. In terms of the Ni-dissolution rate, ex-situ cathode was more efficient than in-situ cathode in the long-term operation except the initial 24hr period.

[References]

Adler D, Seitz F, Turnbull D, Ehrenreich H, "Solid State Physics," Academic Press, New York, 21, 1 (1968)
Appleby AJ, Foulkes FR, "Fuel Cell Handbook," Van Nostrnad Reinhold, New York (1989)
Appleby AJ, "Fuel Cells: Trends in Research and Application," Electric Power Research Institute, Palo Alto, CA, U.S.A., 161 (1986)
Arons RM, "Fabrication of Prelithiated Porous Cathodes for Molten Carbonate Fuel Cells," Ext. Abs. 158th Electrochem. Soc. Meeting, The Electrochem. Soc. Princeton, NJ, 80(2), 383 (1980)
Baker BS, "Molten Carbonate Fuel Cell Technology, The Past Decade," 84-13, Proc. Symp. Molten Carbonate Fuel Cell Technology, ed, Selman, J.R. and Claar, T.D., Electrochem. Soc., Penning, NJ (1984)
Ban S, Hasegawa J, Anusavice KJ, Dent. Moler., 8, 100 (1992)
Charles EB, Kenneth PZ, Ceram. Bull., 64, 593 (1985)
Goodenough JB, Reiss H, "Progress in Solid State Chemistry," Pergamon Press, New York, 5, 271 (1971)
Marshall DB, Am. Ceram. Soc. Bull., 59, 551 (1980)
Nguyen QM, J. Power Sources, 24, 1 (1988)
Selman JR, Marianowski LG, Lovering DG, "Molten Salt Technology," Plenum Press, New York (1982)
Selman JR, Maru HC, "Physical Chemistry and Electrochemistry of Alkali Carbonate Melts," Advances in Molten Salt Chemistry, vol. 4, ed. Mamantov, G., Braunstein, J. and Mamantov, C.B., 159 (1983)
Shores DA, "High Temperature Corrosion," Nation Association of Corrosion Engineers, Houston, TX, 493 (1983)
Veldhuis JBJ, Molen SB, Makkus RC, Broers GHJ, Ber. Bunsenges Phys. Chem., 94, 947 (1990)
Watgner CD, Riggs WN, Davis LE, Moulder JF, Muileberg GE, "Handbook of X-ray Photoelectron Spectroscopy," Perkin-Elemer, Minnesota (1978)

[Referenced By]

[1] Adler D, Seitz F, Turnbull D, Ehrenreich H, "Solid State Physics," Academic Press, New York, 21, 1 (1968)

[2] Appleby AJ, Foulkes FR, "Fuel Cell Handbook," Van Nostrnad Reinhold, New York (1989)

[3] Appleby AJ, "Fuel Cells: Trends in Research and Application," Electric Power Research Institute, Palo Alto, CA, U.S.A., 161 (1986)

[4] Arons RM, "Fabrication of Prelithiated Porous Cathodes for Molten Carbonate Fuel Cells," Ext. Abs. 158th Electrochem. Soc. Meeting, The Electrochem. Soc. Princeton, NJ, 80(2), 383 (1980)

[5] Baker BS, "Molten Carbonate Fuel Cell Technology, The Past Decade," 84-13, Proc. Symp. Molten Carbonate Fuel Cell Technology, ed, Selman, J.R. and Claar, T.D., Electrochem. Soc., Penning, NJ (1984)

[6] Ban S, Hasegawa J, Anusavice KJ, Dent. Moler., 8, 100 (1992)

[7] Charles EB, Kenneth PZ, Ceram. Bull., 64, 593 (1985)

[8] Goodenough JB, Reiss H, "Progress in Solid State Chemistry," Pergamon Press, New York, 5, 271 (1971)

[9] Marshall DB, Am. Ceram. Soc. Bull., 59, 551 (1980)

[10] Nguyen QM, J. Power Sources, 24, 1 (1988)

[11] Selman JR, Marianowski LG, Lovering DG, "Molten Salt Technology," Plenum Press, New York (1982)

[12] Selman JR, Maru HC, "Physical Chemistry and Electrochemistry of Alkali Carbonate Melts," Advances in Molten Salt Chemistry, vol. 4, ed. Mamantov, G., Braunstein, J. and Mamantov, C.B., 159 (1983)

[13] Shores DA, "High Temperature Corrosion," Nation Association of Corrosion Engineers, Houston, TX, 493 (1983)

[14] Veldhuis JBJ, Molen SB, Makkus RC, Broers GHJ, Ber. Bunsenges Phys. Chem., 94, 947 (1990)

[15] Watgner CD, Riggs WN, Davis LE, Moulder JF, Muileberg GE, "Handbook of X-ray Photoelectron Spectroscopy," Perkin-Elemer, Minnesota (1978)