{"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":11.9000,"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′.
液体热电转换装置（LTE）通过电化学塞贝克系数α将环境热转化为电能。最大功率（Wmax）表示为，其中ΔT和R′分别为工作时电极之间的温度差和器件电阻。本文系统地研究了由0.8 M Fe(ClO4)2/Fe(ClO4)3的水溶液、甲醇（MeOH）和丙酮溶液组成的LTEs的电阻组分。我们发现MeOH LTE的电荷转移电阻Rct是三种LTE中最小的。我们证明了MeOH LTE的Wmax略大于或与相应的水相LTE相当。进一步讨论了电解液对流对R′的影响。关键词：液体热电转换；甲醇;电阻率组件;涂层电极。
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