Resistance components of liquid thermoelectric converter composed of [Fe(CN) <sub>6</sub> ] <sup>3−</sup> /[Fe(CN) <sub>6</sub> ] <sup>4−</sup> aqueous electrolyte and graphite-dispersing electrodes
Liquid thermoelectric converter (LTE) converts environmental heat into electric power <i>via</i> the electrochemical Seebeck coefficient <i>α</i>. Here, we systematically investigated components of device resistance <i>R</i>, <i>i.e.</i>, solute (<i>R</i> <sub>s</sub>), charge-transfer (<i>R</i> <sub>ct</sub>), and diffusion (<i>R</i> <sub>dif</sub>) resistances, of LTE composed of 0.8 M Na<sub>4</sub>[Fe(CN)<sub>6</sub>]/K<sub>3</sub>[Fe(CN)<sub>6</sub>] aqueous electrolyte and graphite-dispersing electrodes. <i>R</i> <sup>-1</sup> <sub>ct</sub> and <i>R</i> <sub>dif</sub> <sup>-1</sup> linearly increase with <i>t</i> in the thin <i>t</i> region (<i>t</i> ≤ 40 μm) reflecting the increase in electrochemical active surface area (EASA). The maximum power <i>W</i> <sub>max</sub> of the ferro/ferri LTE (<i>t</i> = 97 μm) reaches 0.76 W m<sup>-2</sup> at Δ<i>T</i> = 50 K, suggesting the effectiveness of the graphite-dispersing electrode in ferro/ferri LTE.
Authors
- Yutaka Moritomo (ORCID: https://orcid.org/0000-0001-6584-7489)
- S. Fukuda
Institutions
- University of Tsukuba (JP)
- Tsukuba University of Technology (JP)
Publication Details
- Journal
- RSC Advances
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5ra07066j
- Citations
- 2
- Primary Topic
- Advanced Thermoelectric Materials and Devices
- Type
- article
- Field-Weighted Citation Impact
- 1.04
Funders
- Japan Society for the Promotion of Science