Hierarchical 3D Reduced Graphene Porous-Carbon-Based PCMs for Superior Thermal Energy Storage Performance

ACS Applied Materials & Interfaces
Ang LiGe Wang

Abstract

Phase change enthalpy and thermal conductivity are the two essential parameters for practical applications of shape-stabilized phase change materials (ss-PCMs). Herein, hierarchical three-dimensional (3D) reduced graphene porous carbon support PCMs have been successfully synthesized by carbonizing a graphene oxide@metal-organic framework (GO@MOF) template, which simultaneously realizes large phase change enthalpy and high thermal conductivity. During the carbonization process, MOFs were converted into hierarchical porous carbons, whereas GO was reduced to high-thermal-performance reduced graphene (rGO). Thus, a hierarchical 3D porous carbon structure with high porosity and large specific surface area was obtained, which provided a suitable condition for encapsulating PCMs. Furthermore, the pores of carbon stabilized the PCMs by capillary force and surface tension. The interaction between the PCM molecule and rGO significantly decreased the interfacial thermal resistance and made the composites reveal high thermal conductivity. Furthermore, the 3D network structure promoted the stretching and crystallization characteristics of the stearic acid molecule in the confined pore space, which enhanced the heat release efficiency. Compa...Continue Reading

References

Aug 24, 2012·Physical Chemistry Chemical Physics : PCCP·Chongyun WangXingguo Li
Feb 20, 2014·Physical Chemistry Chemical Physics : PCCP·Tomosuke Kadoono, Masaru Ogura
Mar 11, 2017·ACS Applied Materials & Interfaces·Julieta PuigRoberto J J Williams

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Citations

Apr 18, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ling Xu, Rui Yang
Sep 13, 2019·ACS Applied Materials & Interfaces·Ahmed AskalanyGiulio Santori

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