{"title":"通过水含量调节提高可持续纤维素基离子凝胶的热电性能","authors":"Xuhui Chen, Yue Lin, Binxia Chen, Ruoxuan Duan, Zehang Zhou, Canhui Lu","doi":"10.1002/smll.202412336","DOIUrl":null,"url":null,"abstract":"<p>Ionogels are widely studied as promising ionic thermoelectric (i-TE) materials to harvest low-grade waste heat into electrical energy due to their huge thermopower and good ionic conductivity, providing a feasible way to sustainable development. Herein, a p-type i-TE cellulose ionogel (CIG) based on Soret effect is prepared by dissolving cellulose in an ionic liquid (IL) and subsequent water-absorbing induced gelation. Its morphological structure and IL distribution are intuitively investigated through cryo-focused ion beam-scanning electron microscope. Experimental characterizations and molecular dynamic simulation studies elucidate that the regulation of water content induces the hydration of 1-butyl-3-methylimidazolium cation and the swelling of CIG, which greatly promotes the ions diffusion and expands the difference in mobility between anions and cations. The proposed CIG exhibits superior thermoelectric properties: an ionic conductivity of 51.2 mS cm<sup>−1</sup>, an ionic Seebeck coefficient of 20.7 mV K<sup>−1</sup>, and an ionic figure of merit <i>zT<sub>i</sub></i> of 2.36 at 30 °C, respectively. A CIG-based i-TE device is designed and assembled to demonstrate its great potential for wearable body heat-to-electricity conversion. The cellulose skeleton in CIG is completely biodegradable in nature and the used IL is recyclable and reusable, providing a green and sustainable strategy for energy harvesting.</p>","PeriodicalId":228,"journal":{"name":"Small","volume":"21 11","pages":""},"PeriodicalIF":12.1000,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancing the Thermoelectric Performance of Sustainable Cellulose-Based Ionogels Through Water Content Regulation\",\"authors\":\"Xuhui Chen, Yue Lin, Binxia Chen, Ruoxuan Duan, Zehang Zhou, Canhui Lu\",\"doi\":\"10.1002/smll.202412336\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Ionogels are widely studied as promising ionic thermoelectric (i-TE) materials to harvest low-grade waste heat into electrical energy due to their huge thermopower and good ionic conductivity, providing a feasible way to sustainable development. Herein, a p-type i-TE cellulose ionogel (CIG) based on Soret effect is prepared by dissolving cellulose in an ionic liquid (IL) and subsequent water-absorbing induced gelation. Its morphological structure and IL distribution are intuitively investigated through cryo-focused ion beam-scanning electron microscope. Experimental characterizations and molecular dynamic simulation studies elucidate that the regulation of water content induces the hydration of 1-butyl-3-methylimidazolium cation and the swelling of CIG, which greatly promotes the ions diffusion and expands the difference in mobility between anions and cations. The proposed CIG exhibits superior thermoelectric properties: an ionic conductivity of 51.2 mS cm<sup>−1</sup>, an ionic Seebeck coefficient of 20.7 mV K<sup>−1</sup>, and an ionic figure of merit <i>zT<sub>i</sub></i> of 2.36 at 30 °C, respectively. A CIG-based i-TE device is designed and assembled to demonstrate its great potential for wearable body heat-to-electricity conversion. The cellulose skeleton in CIG is completely biodegradable in nature and the used IL is recyclable and reusable, providing a green and sustainable strategy for energy harvesting.</p>\",\"PeriodicalId\":228,\"journal\":{\"name\":\"Small\",\"volume\":\"21 11\",\"pages\":\"\"},\"PeriodicalIF\":12.1000,\"publicationDate\":\"2025-02-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Small\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/smll.202412336\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/smll.202412336","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Enhancing the Thermoelectric Performance of Sustainable Cellulose-Based Ionogels Through Water Content Regulation
Ionogels are widely studied as promising ionic thermoelectric (i-TE) materials to harvest low-grade waste heat into electrical energy due to their huge thermopower and good ionic conductivity, providing a feasible way to sustainable development. Herein, a p-type i-TE cellulose ionogel (CIG) based on Soret effect is prepared by dissolving cellulose in an ionic liquid (IL) and subsequent water-absorbing induced gelation. Its morphological structure and IL distribution are intuitively investigated through cryo-focused ion beam-scanning electron microscope. Experimental characterizations and molecular dynamic simulation studies elucidate that the regulation of water content induces the hydration of 1-butyl-3-methylimidazolium cation and the swelling of CIG, which greatly promotes the ions diffusion and expands the difference in mobility between anions and cations. The proposed CIG exhibits superior thermoelectric properties: an ionic conductivity of 51.2 mS cm−1, an ionic Seebeck coefficient of 20.7 mV K−1, and an ionic figure of merit zTi of 2.36 at 30 °C, respectively. A CIG-based i-TE device is designed and assembled to demonstrate its great potential for wearable body heat-to-electricity conversion. The cellulose skeleton in CIG is completely biodegradable in nature and the used IL is recyclable and reusable, providing a green and sustainable strategy for energy harvesting.
期刊介绍:
Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments.
With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology.
Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.