Realization of Hydrogel Electrolytes with High Thermoelectric Properties: Utilization of the Hofmeister Effect DOI
Shuanglin Jia,

Wanyu Qian,

Penglu Yu

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

Ionic thermoelectric materials, renowned for their high Seebeck coefficients, are gaining prominence potential in harvesting low-grade waste heat. However, the theoretical underpinnings enhancing performance of these materials remain underexplored. In this study, Hoffmeister effect was leveraged to augment properties hydrogel-based ionic materials. A series PAAm-x Zn(CF3SO3)2, ZnSO4, and Zn(ClO4)2 hydrogels were synthesized, using polyacrylamide (PAAm) as matrix three distinct zinc salts with varying anion volumes impart effect. Exceptionally, most cost-effective ZnSO4 yielded highest coefficient among hydrogels, PAAm-1 achieving a remarkable value −3.72 mV K–1. To elucidate underlying mechanism, we conducted an innovative analysis correlating ion transfer number. Additionally, hydrogel demonstrated outstanding mechanical properties, including elongation at break (>1400% its peak), exceptional resilience (virtually no hysteresis loops), robust fatigue resistance (overlapping cyclic tensile curves). This work not only advances understanding but also showcases practical heat recovery applications.

Language: Английский

Approaches and methods for improving the performance of ionic thermoelectric materials DOI
Liuqi Cao, Tingting Sun,

Huiru Zhao

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160206 - 160206

Published: Feb. 1, 2025

Language: Английский

Citations

0
A Dual-Function Poly(vinyl alcohol) Hydrogel for Solar Water Production and Thermoelectric Energy Generation DOI Creative Commons
Yuhao Wang,

Ching‐Chieh Hsu,

Shao‐Huan Hong

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

This work addresses the dual challenges of seawater purification and converting low-grade waste heat into electricity, both which are crucial for sustainable resource management. It presents a combined approach that solves problems using self-fabricated device. The device generates temperature gradient through efficient photothermal conversion by placing thermoelectric hydrogels on top hydrogel. Poly(vinyl alcohol) (PVA) is used as matrix hydrogel was selected its biocompatibility ease processing. In order to enhance solar-driven water evaporation efficiency, ball-milled dititanium trioxide (Ti2O3) nanoparticles carbon nanotubes (CNTs) incorporated within PVA matrix. enables rate high 3.22 kg m–2 h–1. Additionally, also serves gels, soaked with K3[Fe(CN)6]/K4[Fe(CN)6] redox pair solution exploit thermogalvanic acid (TGC) effect. arrangement voltage generation reactions at hot cold ends. obtained excellent properties can be characterized ionic Seebeck coefficient (Si) 1.48 mV K–1 power density 9.6 mW after nine were connected in series. As result, this dual-functional simultaneously effectively purifies electricity. Outdoor testing shows daily production 9.2 stable 130 from hydrogels. advances energy technologies opens new avenues innovative applications renewable energy.

Language: Английский

Citations

0
Perspectives on hydrogel-based ionic thermoelectrics: from mechanistic insights to wearable applications of thermo-diffusive ionic materials DOI Open Access

Yoohyeon Choi,

Jin Young Kim, Byeong-Cheol Kang

et al.

Energy Materials, Journal Year: 2025, Volume and Issue: 5(9)

Published: May 16, 2025

Hydrogel-based ionic thermoelectric (i-TE) materials that rely on ion migration driven by thermal gradients have emerged as promising candidates for efficient low-grade heat harvesting. They offer high Seebeck coefficients, mechanical flexibility, and biocompatibility, making them especially attractive wearable electronics biomedical applications. Among various i-TE materials, hydrogels are particularly notable due to their unique structure ability modulate diffusion via interactions between the polymer network species. Despite increasing interest in hydrogel-based fundamental mechanisms governing thermodiffusive transport remain poorly understood, when compared more established thermo-galvanic processes. Moreover, composite architecture of these combining matrices with diverse components presents significant challenges rational design performance optimization. This review addresses systematically analyzing a particular focus Soret effect roles networks conductors. It also provides critical insights into practical applications such generators capacitive energy storage devices. Furthermore, we propose innovative strategies overcome key limitations, those related long-term stability durability. By consolidating current knowledge identifying future research opportunities, this establishes foundation development next-generation flexible materials.

Language: Английский

Citations

0
Realization of Hydrogel Electrolytes with High Thermoelectric Properties: Utilization of the Hofmeister Effect DOI
Shuanglin Jia,

Wanyu Qian,

Penglu Yu

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

Ionic thermoelectric materials, renowned for their high Seebeck coefficients, are gaining prominence potential in harvesting low-grade waste heat. However, the theoretical underpinnings enhancing performance of these materials remain underexplored. In this study, Hoffmeister effect was leveraged to augment properties hydrogel-based ionic materials. A series PAAm-x Zn(CF3SO3)2, ZnSO4, and Zn(ClO4)2 hydrogels were synthesized, using polyacrylamide (PAAm) as matrix three distinct zinc salts with varying anion volumes impart effect. Exceptionally, most cost-effective ZnSO4 yielded highest coefficient among hydrogels, PAAm-1 achieving a remarkable value −3.72 mV K–1. To elucidate underlying mechanism, we conducted an innovative analysis correlating ion transfer number. Additionally, hydrogel demonstrated outstanding mechanical properties, including elongation at break (>1400% its peak), exceptional resilience (virtually no hysteresis loops), robust fatigue resistance (overlapping cyclic tensile curves). This work not only advances understanding but also showcases practical heat recovery applications.

Language: Английский

Citations

1