Abstract
This paper presents the single-electrode Peltier heat of cathodic (or anodic) reaction of Li-Al alloy electrode in a coexisting phase state, or an intermetallic compound phase state estimated by thermoelectric-power measurement. The thermoelectric-power measurements of Li-Al alloys in various coexisting phase states were carried out with both potentiometric and potential-sweep methods in the LiCl-KCl eutectic system between 673 and 843 K. The values of the thermoelectric power of Li-Al alloys calculated by using thermodynamic literature data were in good agreement with those obtained by experiment. The single-electrode Peltier heat changes drastically with change of its phase state, and it was found that the formation reactions of β (Li0.5A10.5) and ϓ (Li0.6A10.4) phases are exothermic, and those of liquid phase from β and ϓ phase are endothermic. The single-electrode Peltier heat for the cathodic formation reaction of Li-Al alloy in intermetallic compound ϓ phase is estimated to be exothermic by using the measured values of thermoelectric powers of Li-Al alloys in (β + ϓ) and (ϓ + liq.) regions.
| Original language | English |
|---|---|
| Pages (from-to) | 3096-3103 |
| Number of pages | 8 |
| Journal | Journal of the Electrochemical Society |
| Volume | 141 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1994 |
| Externally published | Yes |
Keywords
- aluminium alloys Peltier effect
- electrochemical sensors
- electrodes
- lithium alloys
- power measurement
- thermoelectric power
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry
