Solid-state CO{sub 2} sensor with Li{sub 2}CO{sub 3}-Li{sub 3}PO{sub 4}-LiAlO{sub 2} electrolyte and LiCoO{sub 2}-Co{sub 3}O{sub 4} as solid reference electrode
Journal Article
·
· Journal of the Electrochemical Society
- Yokohama National Univ. (Japan). Inst. of Environmental Science and Technology
- Tohoku Univ., Sendai (Japan). Research Inst. for Scientific Measurements
- Akebono Brake Research and Development Center, Ltd., Saitama (Japan)
A solid-state electrochemical cell of the type Pt/LiCoO{sub 2}-5 mole percent (m/o) Co{sub 3}O{sub 4}/Li{sub 2}CO{sub 3} (+5 m/o Li{sub 3}PO{sub 4} + 6 m/o LiAlO{sub 2})/Au, CO{sub 2}, O{sub 2}, was composed for determining CO{sub 2} concentration, where Li{sub 2}CO{sub 3}, a lithium ion conductor, is an electrolyte, and LiCoO{sub 2}-Co{sub 3}O{sub 4} is used as the solid reference electrode. Electromotive force (EMF) of the cell depended logarithmically on the CO{sub 2} partial pressure in CO{sub 2}/O{sub 2} gas mixtures at temperatures between 350 and 400 C. EMF reached a constant value within 1 min after the change of CO{sub 2} partial pressure at 400 C. The sensitivity to CO{sub 2} of this cell was not affected by coexistence of water vapor. The sensor worked stably during a test period of 30 days. The sensing mechanism of CO{sub 2} was discussed together with an explanation to the stability of this sensor.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 603757
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 12 Vol. 144; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
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