Abstract
In this work the performance of NiO and a novel cathode material preoxidized nickel–niobium alloy were investigated. It is found that under a cathode atmosphere of p(CO2)/p(O2) = 0.67 atm/0.33 atm, the equilibrium solubility of nickel ions in (Li0.62, K0.38)2CO3 melt at 650 °C is about 17 ppm for the nickel oxide electrode and 8 ppm for the preoxidized nickel–niobium alloy electrode. The improvement in the stability of material in the melt may be attributed to the formation of a more dense nodular structure for the nickel–niobium alloy electrode when compared with a Ni electrode during preoxidation. The formation of a dense nodular structure for the nickel–niobium alloy electrode depresses the dissolution of NiO from the electrode into the carbonate melt and, accordingly, enhances the stability of the electrode material in the melt. The polarization performance of the NiO cathode was improved by electrodeposition of niobium. As far as the thermal stability and the polarization performance are concerned, the preoxidized nickel–niobium alloy can be considered as a candidate for the cathode material of MCFCs.
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References
L. Blomen and M. Mugerwa (Eds), 'Fuel Cell System' (Plenum, New York, 1993).
A.J. Appleby and F.R. Foulkes, 'Fuel Cell Handbook' (Van Nostrand Reinhold, New York, 1990).
J.R. Selman and T.D. Claar (Eds), 'Molten Carbonate Fuel Cell Technology' (The Electrochemical Society, Pennington, NJ, 1982).
K. Kinoshita, F.R. Mc Larnon and E.J. Cairns, 'Fuel Cell', (National Fuel Cell Coordinating Group, Washington DC, 1988).
K.I. Ota, B.T. Kim, H.Y. Take and N. Kamiya, 'High Temperature Corrosion of Metals with Molten Carbonate', Proc. 5th China-Japan bilateral conference on 'Molten Chemistry and Technology', Kunming, China, Sept. 28-Oct. 2 (1994), p. 42.
C. Yuh, R. Johnsen, M. Farooque and H. Maru, J. Power Sources 56 (1995) 1.
J.R. Selman and H.C. Maru, in Mamantov and J. Braustein (Eds), 'Advances in Molten Salt Chemistry' Vol. 4 (Plenum Press, New York, 1983), p. 308.
J.R. Selman and L.G. Marianowski, in D.G. Lovering (Ed), 'Molten Salt Technology' (Plenum Press, New York, 1982), p. 323.
C. Iacovangelo, J. Electrochem. Soc. 133 (1986) 1359.
G. Kucera, K. Myles, A. Brown, M. Roche, D. Chu and E. Indacochea, Proc. 4th Annual Fuel Cells Contractors Review Meeting, Morgantown, WV, USA, 31 July (1992).
K. Myles, M. Krumpelt, G. Kucera, M. Roche and E. Indacochea, Proc. Joint Contractors Meeting: 'Advanced Turbine Systems, Fuel Cells and Coal-Fired Heat Engines' Conference, Morgantown, WV, USA, 3-5 Aug (1993), p. 386.
L. Plomp, J. Veldhuis, E. Sitters, F. Van Berkel and S. Van der Molen, Proc. International Fuel Cell Conference, Makuhari, Japan (1992), Paper III-B-1.
J. Smith, G. Kucera and A. Brown, Proc. 2nd Symposium on Molten Carbonate Fuel Cell Technology', Seattle, WA, USA, Oct. 1990, Proc. Vol. 90-16 (The Electrochemical Society, Pennington, NJ, 1990), p. 225.
L. Plomp, J.B.J. Veldhuis, E.F. Sitters and S.B. Van der Molen, J. Power Sources 39 (1992) 369.
L. Giorgi, M. Carewska, M. Patriaca, S. Scaccia, E. Simonetti and A. Dibartolomeo, J. Power Sources 49 (1994) 227.
N. Kamiya, Y. Takeishi, S. Shibata, H. Yoshitake and K-I. Ota, Proc. 5th China-Japan bilateral conference on 'Molten Salt Chemistry and Technology', Kunming, China, Sept. 28-Oct. 2 (1994), p. 58.
T. Fujii and H. Baba, Boshoku Gijutsu 29 (1980) 457.
B. Fang, X. Liu, X. Wang and S. Duan, J. Electroanal. Chem. 441 (1998) 1.
B. Fang, X. Liu, X. Wang and S. Duan, J. Electroanal. Chem. 441 (1998) 65.
G.W. Mellors and S. Senderoff, J. Electrochem. Soc. 112 (1965) 266.
I. Uchida, T. Nishina, Y. Mugikura and K. Itaya, J. Electroanal. Chem. 206 (1986) 229.
A.J. Appleby and S.B. Nicholson, J. Electroanal. Chem. 112 (1980) 71.
W.M. Vogel, S.W. Smith and L.J. Bregoli, J. Electrochem. Soc. 130 (1983) 574.
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Fang, B., Zhou, C., Liu, X. et al. Performance of a novel Ni/Nb cathode material for molten carbonate fuel cells (MCFC). Journal of Applied Electrochemistry 31, 201–205 (2001). https://doi.org/10.1023/A:1004130520415
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DOI: https://doi.org/10.1023/A:1004130520415