Thermocharge and Discharge Characteristics of Thermochargeable Galvanic Cells

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  • 熱充電可能なレドックス電池の熱充電•放電特性
  • 熱充電可能なレドックス電池の熱充電・放電特性
  • ネツ ジュウデン カノウ ナ レドックス デンチ ノ ネツ ジュウデン ホウデ

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Abstract

Athermochargeable galvanic cell with a ferro-and ferricyanide ion redox couple incorporating a cation-exchange membrane and an extra pair of electrodes on each side of the membrane was fabricated and its thermocharge and discharge characteristics were investigated. The thermoelectric power of the experimental cells was more dependent on the distance between the main electrodes than on the ferro- and ferricyanide ion concentrations in the electrolyte. The thermocharge and discharge capacities increased with an increase in the ion concentrations. The ratio of the measured capacity to the capacity calculated from the ion concentrations also increased with an increase in the concentrations, although it was only at most 13%. The cell showed good thermocharge and discharge cycling performance: cycling at 0.5mA/cm2 repeated 226 times until the capacity reached half of the maximum. This means that the ferro-and ferricyanide ions were used 10.5 times for 226 cycles.

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