Advanced phase change composite by thermally annealed defect-free graphene for thermal energy storage

Guoqing Xin, Hongtao Sun, Spencer Michael Scott, Tiankai Yao, Fengyuan Lu, Dali Shao, Tao Hu, Gongkai Wang, Guang Ran, Jie Lian

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Organic phase change materials (PCMs) have been utilized as latent heat energy storage and release media for effective thermal management. A major challenge exists for organic PCMs in which their low thermal conductivity leads to a slow transient temperature response and reduced heat transfer efficiency. In this work, 2D thermally annealed defect-free graphene sheets (GSs) can be obtained upon high temperature annealing in removing defects and oxygen functional groups. As a result of greatly reduced phonon scattering centers for thermal transport, the incorporation of ultralight weight and defect free graphene applied as nanoscale additives into a phase change composite (PCC) drastically improve thermal conductivity and meanwhile minimize the reduction of heat of fusion. A high thermal conductivity of the defect-free graphene-PCC can be achieved up to 3.55 W/(m K) at a 10 wt % graphene loading. This represents an enhancement of over 600% as compared to pristine graphene-PCC without annealing at a comparable loading, and a 16-fold enhancement than the pure PCM (1-octadecanol). The defect-free graphene-PCC displays rapid temperature response and superior heat transfer capability as compared to the pristine graphene-PCC or pure PCM, enabling transformational thermal energy storage and management.

Original languageEnglish (US)
Pages (from-to)15262-15271
Number of pages10
JournalACS Applied Materials and Interfaces
Volume6
Issue number17
DOIs
StatePublished - Sep 10 2014

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Thermal energy
Energy storage
Graphene
Phase change materials
Defects
Composite materials
Thermal conductivity
Annealing
Heat transfer
Phonon scattering
Latent heat
Energy management
Temperature control
Temperature
Functional groups
Fusion reactions
Oxygen

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Xin, Guoqing ; Sun, Hongtao ; Scott, Spencer Michael ; Yao, Tiankai ; Lu, Fengyuan ; Shao, Dali ; Hu, Tao ; Wang, Gongkai ; Ran, Guang ; Lian, Jie. / Advanced phase change composite by thermally annealed defect-free graphene for thermal energy storage. In: ACS Applied Materials and Interfaces. 2014 ; Vol. 6, No. 17. pp. 15262-15271.
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abstract = "Organic phase change materials (PCMs) have been utilized as latent heat energy storage and release media for effective thermal management. A major challenge exists for organic PCMs in which their low thermal conductivity leads to a slow transient temperature response and reduced heat transfer efficiency. In this work, 2D thermally annealed defect-free graphene sheets (GSs) can be obtained upon high temperature annealing in removing defects and oxygen functional groups. As a result of greatly reduced phonon scattering centers for thermal transport, the incorporation of ultralight weight and defect free graphene applied as nanoscale additives into a phase change composite (PCC) drastically improve thermal conductivity and meanwhile minimize the reduction of heat of fusion. A high thermal conductivity of the defect-free graphene-PCC can be achieved up to 3.55 W/(m K) at a 10 wt {\%} graphene loading. This represents an enhancement of over 600{\%} as compared to pristine graphene-PCC without annealing at a comparable loading, and a 16-fold enhancement than the pure PCM (1-octadecanol). The defect-free graphene-PCC displays rapid temperature response and superior heat transfer capability as compared to the pristine graphene-PCC or pure PCM, enabling transformational thermal energy storage and management.",
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Xin, G, Sun, H, Scott, SM, Yao, T, Lu, F, Shao, D, Hu, T, Wang, G, Ran, G & Lian, J 2014, 'Advanced phase change composite by thermally annealed defect-free graphene for thermal energy storage', ACS Applied Materials and Interfaces, vol. 6, no. 17, pp. 15262-15271. https://doi.org/10.1021/am503619a

Advanced phase change composite by thermally annealed defect-free graphene for thermal energy storage. / Xin, Guoqing; Sun, Hongtao; Scott, Spencer Michael; Yao, Tiankai; Lu, Fengyuan; Shao, Dali; Hu, Tao; Wang, Gongkai; Ran, Guang; Lian, Jie.

In: ACS Applied Materials and Interfaces, Vol. 6, No. 17, 10.09.2014, p. 15262-15271.

Research output: Contribution to journalArticle

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AU - Xin, Guoqing

AU - Sun, Hongtao

AU - Scott, Spencer Michael

AU - Yao, Tiankai

AU - Lu, Fengyuan

AU - Shao, Dali

AU - Hu, Tao

AU - Wang, Gongkai

AU - Ran, Guang

AU - Lian, Jie

PY - 2014/9/10

Y1 - 2014/9/10

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AB - Organic phase change materials (PCMs) have been utilized as latent heat energy storage and release media for effective thermal management. A major challenge exists for organic PCMs in which their low thermal conductivity leads to a slow transient temperature response and reduced heat transfer efficiency. In this work, 2D thermally annealed defect-free graphene sheets (GSs) can be obtained upon high temperature annealing in removing defects and oxygen functional groups. As a result of greatly reduced phonon scattering centers for thermal transport, the incorporation of ultralight weight and defect free graphene applied as nanoscale additives into a phase change composite (PCC) drastically improve thermal conductivity and meanwhile minimize the reduction of heat of fusion. A high thermal conductivity of the defect-free graphene-PCC can be achieved up to 3.55 W/(m K) at a 10 wt % graphene loading. This represents an enhancement of over 600% as compared to pristine graphene-PCC without annealing at a comparable loading, and a 16-fold enhancement than the pure PCM (1-octadecanol). The defect-free graphene-PCC displays rapid temperature response and superior heat transfer capability as compared to the pristine graphene-PCC or pure PCM, enabling transformational thermal energy storage and management.

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