High‐Performance Quasi‐Solid‐State Thermogalvanic Cells with Metallized Fibril‐Based Textile Electrodes and Structure‐Breaking Salts DOI Open Access

Jaejin Choi,

Jeongmin Mo, Jaemin Jung

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 12, 2024

Abstract Thermogalvanic cells (TGCs) convert heat into electricity through thermoelectrochemical reactions of redox couples, generating a millivolt‐scale Seebeck coefficient. However, TGCs based on liquid electrolytes are prone to leakage, whereas quasi‐solid‐state (QTCs) using gel‐based typically have low power outputs due slow ion diffusion and limited reaction rates. Herein, we present novel strategies for developing high‐performance all‐flexible QTCs both metallized fibril‐based textile electrodes with extremely large surface area, (specifically Ni textiles), structure‐breaking salts hydrogel electrolytes. The oxidized create oxide heterostructures, forming numerous O vacancy defects that enhance reactions. Meanwhile, the facilitate improve by disrupting water structures in electrolyte. These advancements significantly performance without need precious‐metal electrodes, achieving remarkable maximum density 4.05 mW m −2 K record‐high effective cell conductivity 17.3 S −1 , compared previously reported QTCs. Finally, proposed can generate stable open‐circuit voltage output wearable applications owing flexibility electrolyte, successful electronic device operation body from forearm (Δ T ≈ 2 K).

Language: Английский

Recent Progress in Polymer Gel‐Based Ionic Thermoelectric Devices: Materials, Methods, and Perspectives DOI Open Access

Chia‐Yu Lee,

Shao‐Huan Hong,

Cheng‐Liang Liu

et al.

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Polymer gel-based ionic thermoelectric (i-TE) devices, including thermally chargeable capacitors and thermogalvanic cells, represent an innovative approach to sustainable energy harvesting by converting waste heat into electricity. This review provides a comprehensive overview of recent advancements in i-TE materials, focusing on their Seebeck coefficients, the mechanisms underlying thermodiffusion effects, various strategies employed enhance performance. Gel-based materials show great promise due flexibility, low cost, suitability for flexible wearable devices. However, challenges such as improving conductivity stability redox couples remain. Future directions include enhancing efficiency ionic-electronic coupling developing more robust electrode optimize conversion real-world applications.

Language: Английский

Citations

0
Significantly enhanced properties of micro-ionic thermocells through the microstructure interfacial effect DOI
Hongwei Chen,

Shuqi Zhao,

Haoyu Zou

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(36), P. 24488 - 24498

Published: Jan. 1, 2024

A micro-ionic thermocell with a high P max /Δ T 2 (15.4 mW m −2 K ) was reported through the interfacial effect of microstructure-electrolyte solution at microscale.

Language: Английский

Citations

1
Performance enhancement in a novel concentrated photovoltaic and liquid-flow thermocells hybrid system through optimal photovoltaic cells DOI

Fanghao Zhong,

Hongwei Chen, Ming Qu

et al.

Energy, Journal Year: 2024, Volume and Issue: unknown, P. 133872 - 133872

Published: Nov. 1, 2024

Language: Английский

Citations

0
High‐Performance Quasi‐Solid‐State Thermogalvanic Cells with Metallized Fibril‐Based Textile Electrodes and Structure‐Breaking Salts DOI Open Access

Jaejin Choi,

Jeongmin Mo, Jaemin Jung

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 12, 2024

Abstract Thermogalvanic cells (TGCs) convert heat into electricity through thermoelectrochemical reactions of redox couples, generating a millivolt‐scale Seebeck coefficient. However, TGCs based on liquid electrolytes are prone to leakage, whereas quasi‐solid‐state (QTCs) using gel‐based typically have low power outputs due slow ion diffusion and limited reaction rates. Herein, we present novel strategies for developing high‐performance all‐flexible QTCs both metallized fibril‐based textile electrodes with extremely large surface area, (specifically Ni textiles), structure‐breaking salts hydrogel electrolytes. The oxidized create oxide heterostructures, forming numerous O vacancy defects that enhance reactions. Meanwhile, the facilitate improve by disrupting water structures in electrolyte. These advancements significantly performance without need precious‐metal electrodes, achieving remarkable maximum density 4.05 mW m −2 K record‐high effective cell conductivity 17.3 S −1 , compared previously reported QTCs. Finally, proposed can generate stable open‐circuit voltage output wearable applications owing flexibility electrolyte, successful electronic device operation body from forearm (Δ T ≈ 2 K).

Language: Английский

Citations

0