A Low-Temperature Heat Output Photoactive Material-Based High-Performance Thermal Energy Storage Closed System

Materials

Xiaomin Wang¹  Xiangyu Yang¹  Jianguo Zhao¹  Yongzhen Wang¹  Shijie Li²  Jin Zhang² 

[1] College of Materials Science and Engineering, Taiyuan University of Technology, Yingze West Street, Taiyuan 030024, China;Institute of Carbon Materials Science, Shanxi Datong University, Xingyun Street, Datong 037009, China;

关键词: photothermal conversion material;    outstanding heat storage density;    long-term storage;    low temperature energy output;    closed system;   

DOI  :  10.3390/ma14061434

来源: DOAJ

【 摘 要 】

Designing and synthesizing photothermal conversion materials with better storage capacity, long-term stability as well as low temperature energy output capability is still a huge challenge in the area of photothermal storage. In this work, we report a brand new photothermal conversion material obtained by attaching trifluoromethylated azobenzene (Azo_F) to reduced graphene oxide (rGO). Azo_F-rGO exhibits outstanding heat storage density and power density up to 386.1 kJ·kg⁻¹ and 890.6 W·kg⁻¹, respectively, with a long half-life (87.7 h) because of the H-bonds based on high attachment density. Azo_F-rGO also exhibits excellent cycling stability and is equipped with low-temperature energy output capability, which achieves the reversible cycle of photothermal conversion within a closed system. This novel Azo_F-rGO complex, which on the one hand exhibits remarkable energy storage performance as well as excellent storage life span, and on the other hand is equipped with the ability to release heat at low temperatures, shows broad prospects in the practical application of actual photothermal storage.

【 授权许可】

Unknown