Abstract
The solubility of a nickel oxide cathode in molten carbonate fuel cell (MCFC) electrolyte is one of the major technical obstacles to the commercialization of such fuel cells. Lithium cobalt oxide, LiCoO 2, has been selected as a candidate material for MCFC cathodes because its solubility is small and the rate of dissolution into the melt is slower than that for nickel oxide. On the other hand, the electrical conductivity of LiCoO 2 is lower than that of nickel oxide. Thus, nickel oxide has been coated with stable LiCoO 2 in carbonate by a PVA-assisted sol-gel method to give a LiCoO 2-coated NiO (LC-NiO) cathode. Raman spectra show that the structure of LC-NiO is different from that of nickel oxide, and that a LiCo 1-yNi yO 2 phase is formed during heat-treatment of the LC-NiO cathode. The coating of LiCoO 2 on NiO electrode increases with increase in the dipping and heating times. The performance of unit cells show that the mean voltage of the cells is 0.80 V using a NiO cathode and 0.85 V with a LC-NiO cathode at a current density of 150 mA cm -2. The solubility of the LC-NiO cathode in molten carbonate electrolyte is half that of NiO cathode after 300 h at 650°C.
| Original language | English |
|---|---|
| Pages (from-to) | 50-56 |
| Number of pages | 7 |
| Journal | Journal of Power Sources |
| Volume | 83 |
| Issue number | 1-2 |
| Publication status | Published - 1999 Oct 1 |
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Keywords
- Fuel cell
- LiCoO -coated NiO cathode
- Lithium cobalt oxide
- PVA-assisted sol-gel
ASJC Scopus subject areas
- Electrochemistry
- Fuel Technology
- Materials Chemistry
Cite this
Properties of a new type of cathode for molten carbonate fuel cells. / Kuk, Seung Taek; Song, Young Seck; Kim, Keon.
In: Journal of Power Sources, Vol. 83, No. 1-2, 01.10.1999, p. 50-56.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Properties of a new type of cathode for molten carbonate fuel cells
AU - Kuk, Seung Taek
AU - Song, Young Seck
AU - Kim, Keon
PY - 1999/10/1
Y1 - 1999/10/1
N2 - The solubility of a nickel oxide cathode in molten carbonate fuel cell (MCFC) electrolyte is one of the major technical obstacles to the commercialization of such fuel cells. Lithium cobalt oxide, LiCoO 2, has been selected as a candidate material for MCFC cathodes because its solubility is small and the rate of dissolution into the melt is slower than that for nickel oxide. On the other hand, the electrical conductivity of LiCoO 2 is lower than that of nickel oxide. Thus, nickel oxide has been coated with stable LiCoO 2 in carbonate by a PVA-assisted sol-gel method to give a LiCoO 2-coated NiO (LC-NiO) cathode. Raman spectra show that the structure of LC-NiO is different from that of nickel oxide, and that a LiCo 1-yNi yO 2 phase is formed during heat-treatment of the LC-NiO cathode. The coating of LiCoO 2 on NiO electrode increases with increase in the dipping and heating times. The performance of unit cells show that the mean voltage of the cells is 0.80 V using a NiO cathode and 0.85 V with a LC-NiO cathode at a current density of 150 mA cm -2. The solubility of the LC-NiO cathode in molten carbonate electrolyte is half that of NiO cathode after 300 h at 650°C.
AB - The solubility of a nickel oxide cathode in molten carbonate fuel cell (MCFC) electrolyte is one of the major technical obstacles to the commercialization of such fuel cells. Lithium cobalt oxide, LiCoO 2, has been selected as a candidate material for MCFC cathodes because its solubility is small and the rate of dissolution into the melt is slower than that for nickel oxide. On the other hand, the electrical conductivity of LiCoO 2 is lower than that of nickel oxide. Thus, nickel oxide has been coated with stable LiCoO 2 in carbonate by a PVA-assisted sol-gel method to give a LiCoO 2-coated NiO (LC-NiO) cathode. Raman spectra show that the structure of LC-NiO is different from that of nickel oxide, and that a LiCo 1-yNi yO 2 phase is formed during heat-treatment of the LC-NiO cathode. The coating of LiCoO 2 on NiO electrode increases with increase in the dipping and heating times. The performance of unit cells show that the mean voltage of the cells is 0.80 V using a NiO cathode and 0.85 V with a LC-NiO cathode at a current density of 150 mA cm -2. The solubility of the LC-NiO cathode in molten carbonate electrolyte is half that of NiO cathode after 300 h at 650°C.
KW - Fuel cell
KW - LiCoO -coated NiO cathode
KW - Lithium cobalt oxide
KW - PVA-assisted sol-gel
UR - http://www.scopus.com/inward/record.url?scp=0002682990&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0002682990&partnerID=8YFLogxK
M3 - Article
VL - 83
SP - 50
EP - 56
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 1-2
ER -