The Single-Electrode Peltier Heats of Li-Al Alloy Electrodes in Licl-Kcl Eutectic System

Koji Amezawa, Yasuhiko Ito, Yoichi Tomii

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

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 languageEnglish
Pages (from-to)3096-3103
Number of pages8
JournalJournal of the Electrochemical Society
Volume141
Issue number11
DOIs
Publication statusPublished - 1994
Externally publishedYes

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

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