The single electrode peltier heats of Li+/Li, H 2/H- and Li+/Pd-Li couples in molten LiCl-KCl systems

Hironori Nakajima, Toshiyuki Nohira, Yasuhiko Ito

Research output: Contribution to journalArticle

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Abstract

The thermoelectric power of the Li+/Li couple was measured in a LiCl-KCl eutectic melt at 633-773 K. The obtained value, 0.089 mV K -1, gives the single electrode Peltier heat for the reaction Li ++e- ⇌ Li as - 5.8 kJ F-1 at 673 K (endothermic cathodic reaction). The single electrode Peltier heat for the reaction 1/2 H2 + e- ⇌ H- in a molten LiCl-KCl-LiH system has been calculated using the temperature dependence of the equilibrium potential of the H2/H- couple measured with reference to the Li+/Li potential, which gives 5.8 kJ F-1 (exothermic cathodic reaction) under the condition of hydrogen pressure of 1.0 atm, H- ion concentration of 0.01 (anion fraction) and 673 K. The single electrode Peltier heats for formation of Pd-Li alloys have been also evaluated.

Original languageEnglish
Pages (from-to)4987-4991
Number of pages5
JournalElectrochimica Acta
Volume49
Issue number27
DOIs
Publication statusPublished - Oct 30 2004

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Molten materials
Electrodes
Hydrogen
Thermoelectric power
Eutectics
Anions
Negative ions
Ions
Hot Temperature
Temperature

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

The single electrode peltier heats of Li+/Li, H 2/H- and Li+/Pd-Li couples in molten LiCl-KCl systems. / Nakajima, Hironori; Nohira, Toshiyuki; Ito, Yasuhiko.

In: Electrochimica Acta, Vol. 49, No. 27, 30.10.2004, p. 4987-4991.

Research output: Contribution to journalArticle

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AB - The thermoelectric power of the Li+/Li couple was measured in a LiCl-KCl eutectic melt at 633-773 K. The obtained value, 0.089 mV K -1, gives the single electrode Peltier heat for the reaction Li ++e- ⇌ Li as - 5.8 kJ F-1 at 673 K (endothermic cathodic reaction). The single electrode Peltier heat for the reaction 1/2 H2 + e- ⇌ H- in a molten LiCl-KCl-LiH system has been calculated using the temperature dependence of the equilibrium potential of the H2/H- couple measured with reference to the Li+/Li potential, which gives 5.8 kJ F-1 (exothermic cathodic reaction) under the condition of hydrogen pressure of 1.0 atm, H- ion concentration of 0.01 (anion fraction) and 673 K. The single electrode Peltier heats for formation of Pd-Li alloys have been also evaluated.

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