Enhanced Thermoelectric Performance of PVA-Based Ionogels: Tailoring Crystallinity via Additives for Advanced Waste Heat Recovery.

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2025-06-21 DOI:10.1021/acsami.5c08724

Ling-Chieh Lee,Shao-Huan Hong,Min-Su Kim,U-Ser Jeng,Chia-Hsin Wang,Shih-Huang Tung,Keun Hyung Lee,Cheng-Liang Liu

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Abstract

Converting low-grade waste heat into electricity is crucial for green energy. This study introduces an innovative approach using poly(vinyl alcohol) (PVA)-based ionogels incorporating 1-ethyl-3-methylimidazolium dicyanamide ([EMIM][DCA]) and specific additives: 2-carboxyphenylacetic acid (H), 2-sulfobenzoic acid (S), and 2-carboxyphenyl phosphate (P)). These additives enable successful tailoring of the crystallinity, leading to a substantial increase in the ionic figure-of-merit (zTi), from 0.006 for the PVA ionogel to 0.27 for the ionogel with P additives. Furthermore, the P-additive ionogels exhibit excellent mechanical properties, with a tensile stress of 1.75 MPa and a strain of 460%. A four-pair ionic thermoelectric capacitor made from these ionogels generates 0.33 V and achieves a power output of 2.4 mW m-2. This advancement significantly improves the thermoelectric performance of PVA ionogels, aiding in efficient waste heat utilization and sustainable energy development.

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增强pva基离子凝胶的热电性能：通过添加剂调整结晶度用于高级废热回收。

将低品位废热转化为电能对绿色能源至关重要。本研究介绍了一种创新的方法，使用基于聚乙烯醇（PVA）的离子凝胶，其中含有1-乙基-3-甲基咪唑双氰酰胺（[EMIM][DCA]）和特定添加剂：2-羧基苯基乙酸(H)、2-基亚苯甲酸（S)和2-羧基苯基磷酸(P)）。这些添加剂能够成功地调整结晶度，导致离子品质系数（zTi）大幅增加，从PVA离子凝胶的0.006增加到P添加剂离子凝胶的0.27。此外，p -添加剂离子凝胶具有优异的力学性能，拉伸应力为1.75 MPa，应变为460%。由这些离子凝胶制成的四对离子热电电容器产生0.33 V，输出功率为2.4 mW m-2。这一进展显著提高了聚乙烯醇离子凝胶的热电性能，有助于废热的高效利用和能源的可持续发展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.