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Nano Research 2017, 10(3): 802-813 https://doi.org/10.1007/s12274-016-1333-1
Research Article | Issue | Published: 22 December 2016

Hierarchical graphene foam-based phase change materials with enhanced thermal conductivity and shape stability for efficient solar-to-thermal energy conversion and storage

Show Author's Information Guoqiang Qi1,2,  Jie Yang2,  Ruiying Bao2,  Dongyun Xia1,  Min Cao1,  Wei Yang2( ),  Mingbo Yang2,  Dacheng Wei1( )
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200433 China
College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
Keywords:
thermal conductivity, solar energy, phase-change materials, hierarchical graphene foam, light-to-thermal energy conversion
Cite this article:
Qi G, Yang J, Bao R, et al. Hierarchical graphene foam-based phase change materials with enhanced thermal conductivity and shape stability for efficient solar-to-thermal energy conversion and storage. Nano Research, 2017, 10(3): 802-813. https://doi.org/10.1007/s12274-016-1333-1
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Abstract Full text About this article

Recently, graphene foam (GF) with a three-dimensional (3D) interconnected network produced by template-directed chemical vapor deposition (CVD) has been used to prepare composite phase-change materials (PCMs) with enhanced thermal conductivity. However, the pore size of GF is as large as hundreds of micrometers, resulting in a remarkable thermal resistance for heat transfer from the PCM inside the large pores to the GF strut walls. In this study, a novel 3D hierarchical GF (HGF) is obtained by filling the pores of GF with hollow graphene networks. The HGF is then used to prepare a paraffin wax (PW)-based composite PCM. The thermal conductivity of the PW/HGF composite PCM is 87% and 744% higher than that of the PW/GF composite PCM and pure PW, respectively. The PW/HGF composite PCM also exhibits better shape stability than the PW/GF composite PCM, negligible change in the phase-change temperature, a high thermal energy storage density that is 95% of pure PW, good thermal reliability, and chemical stability with cycling for 100 times. More importantly, PW/HGF composite PCM allows light-driven thermal energy storage with a high light-to-thermal energy conversion and storage efficiency, indicating its great potential for applications in solar-energy utilization and storage.


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About this article

Hierarchical graphene foam-based phase change materials with enhanced thermal conductivity and shape stability for efficient solar-to-thermal energy conversion and storage

Show Author's information Guoqiang Qi1,2, Jie Yang2, Ruiying Bao2, Dongyun Xia1, Min Cao1, Wei Yang2( ), Mingbo Yang2, Dacheng Wei1( )
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200433 China
College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China

Abstract

Recently, graphene foam (GF) with a three-dimensional (3D) interconnected network produced by template-directed chemical vapor deposition (CVD) has been used to prepare composite phase-change materials (PCMs) with enhanced thermal conductivity. However, the pore size of GF is as large as hundreds of micrometers, resulting in a remarkable thermal resistance for heat transfer from the PCM inside the large pores to the GF strut walls. In this study, a novel 3D hierarchical GF (HGF) is obtained by filling the pores of GF with hollow graphene networks. The HGF is then used to prepare a paraffin wax (PW)-based composite PCM. The thermal conductivity of the PW/HGF composite PCM is 87% and 744% higher than that of the PW/GF composite PCM and pure PW, respectively. The PW/HGF composite PCM also exhibits better shape stability than the PW/GF composite PCM, negligible change in the phase-change temperature, a high thermal energy storage density that is 95% of pure PW, good thermal reliability, and chemical stability with cycling for 100 times. More importantly, PW/HGF composite PCM allows light-driven thermal energy storage with a high light-to-thermal energy conversion and storage efficiency, indicating its great potential for applications in solar-energy utilization and storage.

Keywords: thermal conductivity, solar energy, phase-change materials, hierarchical graphene foam, light-to-thermal energy conversion

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Publication history
Copyright
Acknowledgements

Publication history

Received: 14 September 2016
Revised: 10 October 2016
Accepted: 12 October 2016
Published: 22 December 2016
Issue date: March 2017

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

This work was funded by the National Thousand Young Talents of China, the National Natural Science Foundation of China (Nos. 21544001, 21603038, 51422305, and 51421061), the Innovation Team Program of Science & Technology Department of Sichuan Province (No. 2014TD0002) and State Key Laboratory of Polymer Materials Engineering (No. sklpme2014-2-02).

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