Hui Liu , Anqi Zhao , Lin Pan , Tao Sun , Jiamin Cai , Changchun Chen , Yifeng Wang
{"title":"Effects of incorporating pyrite-analogous CoSe2 on the thermoelectric properties of TiS2","authors":"Hui Liu , Anqi Zhao , Lin Pan , Tao Sun , Jiamin Cai , Changchun Chen , Yifeng Wang","doi":"10.1016/j.jallcom.2024.176410","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, we delved into the thermoelectric characteristics of TiS<sub>2</sub> - <em>x</em> mol% CoSe<sub>2</sub> composites, with <em>x</em> varying from 0 to 3. The incorporation of a modest quantity of CoSe<sub>2</sub> prominently enhanced the grain orientation of TiS<sub>2</sub>. Nevertheless, a subsequent increase in CoSe<sub>2</sub> content led to a rapid deterioration of the TiS<sub>2</sub> grain orientation. The electrical conductivity <em>σ</em> exhibited an initial surge followed by a decline upon the addition of CoSe<sub>2</sub>. Conversely, the absolute Seebeck coefficient |<em>S</em>| initially decreased and then rose. Notably, the power factor <em>PF</em> of TiS<sub>2</sub> peaked at 14.4 μWcm<sup>−1</sup>K<sup>−2</sup> upon the inclusion of 2 mol% CoSe<sub>2</sub>, marking a substantial 1.7-fold enhancement compared to pristine TiS<sub>2</sub>. Furthermore, the thermal conductivity <em>κ</em> of TiS<sub>2</sub> was effectively suppressed by the addition of CoSe<sub>2</sub>. Consequently, TiS<sub>2</sub> - 2 mol% CoSe<sub>2</sub> achieved a <em>ZT</em><sub>max</sub> value of 0.59 at 673 K, representing a noteworthy 1.8-fold increase over pristine TiS<sub>2</sub>.</p></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1007 ","pages":"Article 176410"},"PeriodicalIF":5.8000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925838824029979","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, we delved into the thermoelectric characteristics of TiS2 - x mol% CoSe2 composites, with x varying from 0 to 3. The incorporation of a modest quantity of CoSe2 prominently enhanced the grain orientation of TiS2. Nevertheless, a subsequent increase in CoSe2 content led to a rapid deterioration of the TiS2 grain orientation. The electrical conductivity σ exhibited an initial surge followed by a decline upon the addition of CoSe2. Conversely, the absolute Seebeck coefficient |S| initially decreased and then rose. Notably, the power factor PF of TiS2 peaked at 14.4 μWcm−1K−2 upon the inclusion of 2 mol% CoSe2, marking a substantial 1.7-fold enhancement compared to pristine TiS2. Furthermore, the thermal conductivity κ of TiS2 was effectively suppressed by the addition of CoSe2. Consequently, TiS2 - 2 mol% CoSe2 achieved a ZTmax value of 0.59 at 673 K, representing a noteworthy 1.8-fold increase over pristine TiS2.
期刊介绍:
The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.