Zn掺杂ZIF-67构筑光热-相变储能一体化材料的性能研究

doi:10.11896/cldb.23100236

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Abstract Organic solid-liquid phase change materials (PCMs) suffer low thermal conductivity and phase change leakage, and most of them possess no photo-thermal conversion capability, which limits their application in the field of solar thermal storage. In this paper, Zn-doped ZIF-67 was used to modulate the pore structure of the derivatives to achieve pore expansion, and stearic acid (SA) was loaded by vacuum melt adsorption to construct integrated photothermal phase change energy storage materials (SA/Co_xT). Characterization was performed with the aid of N₂ adsorption-desorption, FTIR, XRD, SEM and Raman to reveal the effects of Co_xT on the thermal conductivity, deformation ability and photo-thermal conversion ability of SA. The experimental results showed that with the addition of Co_xT to SA, the thermal conductivity was significantly improved, the phase transition did not leak and good photo-thermal conversion performance was assembled. Among them, the thermal storage efficiency of SA/Co₂900 can reach 78.69%, the thermal conductivity (0.543 W/(m·K)) is increased by 201.67% compared with SA, and the photo-thermal conversion efficiency is 73.82%. SA/Co₂900 does not have any morphological change and leakage in the phase transition process, and still has good thermal storage capacity after 100 repeated cycles of heat storage/exhaustion.

Key words： phase change thermal storage shape stability ZIF-67 photo-thermal conversion Zn doping

Published: 25 March 2025 Online: 2025-03-24

CLC number:

TK019

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	Articles by authors
	LI Hui
	GUO Wenyao
	XIAO Qiangqiang
	WANG Mengqian
	DU Shouqin
	LI Guoning
	LI Shijie
	GUO Min
	MA Xiaoling

Cite this article:

LI Hui,GUO Wenyao,XIAO Qiangqiang, et al. Construction and Performance of Integrated Photothermal and Phase-change Energy Storage Materials via Zn-doped ZIF-67[J]. Materials Reports, 2025, 39(6): 23100236-7.

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https://www.mater-rep.com/EN/10.11896/cldb.23100236 OR https://www.mater-rep.com/EN/Y2025/V39/I6/23100236

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