{"title":"Methanol-based thermoelectric conversion device with high power†","authors":"Touya Aiba, Haruka Yamada and Yutaka Moritomo","doi":"10.1039/D4IM00113C","DOIUrl":null,"url":null,"abstract":"<p>A liquid thermoelectric conversion device (LTE) converts environmental heat into electric power <em>via</em> the electrochemical Seebeck coefficient <em>α</em>. The maximum power (<em>W</em><small><sub>max</sub></small>) is expressed as <img>, where Δ<em>T</em> and <em>R</em>′ are the temperature difference between electrodes and device resistance in operation, respectively. Here, we systematically investigated the resistance components of LTEs composed of aqueous, methanol (MeOH) and acetone solutions containing 0.8 M Fe(ClO<small><sub>4</sub></small>)<small><sub>2</sub></small>/Fe(ClO<small><sub>4</sub></small>)<small><sub>3</sub></small>. We found that the charge transfer resistance <em>R</em><small><sub>ct</sub></small> of the MeOH LTE is the smallest among the three LTEs. We demonstrated that the <em>W</em><small><sub>max</sub></small> of the MeOH LTE is slightly larger than or comparable with that of the corresponding aqueous LTE. We further discussed the effects of the convection of an electrolyte on <em>R</em>′.</p><p>Keywords: Liquid thermoelectric conversion; Methanol; Resistivity components; Coated electrode.</p>","PeriodicalId":29808,"journal":{"name":"Industrial Chemistry & Materials","volume":" 2","pages":" 223-230"},"PeriodicalIF":0.0000,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/im/d4im00113c?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial Chemistry & Materials","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/im/d4im00113c","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
A liquid thermoelectric conversion device (LTE) converts environmental heat into electric power via the electrochemical Seebeck coefficient α. The maximum power (Wmax) is expressed as , where ΔT and R′ are the temperature difference between electrodes and device resistance in operation, respectively. Here, we systematically investigated the resistance components of LTEs composed of aqueous, methanol (MeOH) and acetone solutions containing 0.8 M Fe(ClO4)2/Fe(ClO4)3. We found that the charge transfer resistance Rct of the MeOH LTE is the smallest among the three LTEs. We demonstrated that the Wmax of the MeOH LTE is slightly larger than or comparable with that of the corresponding aqueous LTE. We further discussed the effects of the convection of an electrolyte on R′.
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