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Updated: Nov 10, 2025
09:09
Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
Published on: February 5, 2020
7.4K
A Low-Temperature Heat Output Photoactive Material-Based High-Performance Thermal Energy Storage Closed System
Xiangyu Yang1,2, Shijie Li2, Jin Zhang2
1College of Materials Science and Engineering, Taiyuan University of Technology, Yingze West Street, Taiyuan 030024, China.
Materials (Basel, Switzerland)
|April 3, 2021
Summary
Researchers developed a new photothermal material, AzoF-rGO, by combining trifluoromethylated azobenzene with reduced graphene oxide. This material demonstrates superior heat storage and release capabilities, offering a promising solution for efficient photothermal energy applications.
Area of Science:
- Materials Science
- Energy Storage
- Photothermal Conversion
Background:
- Photothermal conversion materials face challenges in storage capacity, long-term stability, and low-temperature energy output.
- Developing advanced materials is crucial for efficient solar energy utilization and thermal management.
Purpose of the Study:
- To design and synthesize a novel photothermal conversion material with enhanced energy storage and low-temperature output.
- To investigate the properties and performance of the synthesized material for practical photothermal storage applications.
Main Methods:
- Synthesizing a composite material by attaching trifluoromethylated azobenzene (AzoF) to reduced graphene oxide (rGO).
- Characterizing the material's photothermal conversion efficiency, heat storage density, power density, and long-term stability.
- Evaluating the material's low-temperature energy output capability and cycling stability within a closed system.
Main Results:
- The AzoF-rGO composite exhibited high heat storage density (386.1 kJ·kg-1) and power density (890.6 W·kg-1).
- The material demonstrated a long half-life of 87.7 h, attributed to H-bonds and high attachment density.
- Excellent cycling stability and reversible photothermal conversion at low temperatures were achieved.
Conclusions:
- The novel AzoF-rGO complex shows remarkable energy storage performance and longevity.
- The material's ability to release heat at low temperatures indicates significant potential for practical photothermal storage applications.
- This advancement addresses key challenges in photothermal storage, paving the way for broader adoption.
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