Journal
ENERGY STORAGE MATERIALS
Volume 13, Issue -, Pages 88-95Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2017.12.028
Keywords
Graphene foam; Hybrid graphene aerogel; Composite phase change materials; Solar energy conversion
Funding
- National Program for Thousand Young Talents of China
- National Natural Science Foundation of China [51422305, 21544001, 51721091]
- Sichuan Provincial Science Fund for Distinguished Young Scholars [2015JQO003]
- State Key Laboratory of Polymer Materials Engineering [sklpme2014-2-02]
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Three-dimensional (3D) graphene foam (GF) produced by template-directed chemical vapour deposition (CVD) has shown great potential for applications in composite phase change materials (PCMs) with enhanced thermal conductivity and graphene aerogel (GA) has been proved to be effective supporting scaffold to improve the shape-stability of organic PCMs. Here, hybrid graphene aerogel (HGA) is encapsulated in GF framework to obtain a 3D GF/HGA (GH) hybrid microstructure via combined self-assembly and CVD techniques. The thermal conductivity of paraffin wax (PW)/GH composite PCMs increases by 574% and 98% compared with pure PW and PW/GF composite PCMs, respectively. Meanwhile, PW/GH composite PCM exhibits better shape stability than PW/GF composite PCM, high thermal energy storage density, good thermal reliability and chemical stability. PW/GH composite PCMs also realize efficient light-to-thermal energy conversion and storage owing to the excellent photoabsorption. This study sheds light on the development of the composite PCMs with good comprehensive properties, which are potentially to be used widely in energy storage systems.
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