首页|An innovative graphene-based phase change composite constructed by syneresis with high thermal conductivity for efficient solar-thermal conversion and storage
An innovative graphene-based phase change composite constructed by syneresis with high thermal conductivity for efficient solar-thermal conversion and storage
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Graphene-based phase change composites hold significant potential for solar energy utilization,but their poor thermal conductivity hinders their practical applications.In this work,an air-dried graphene skele-ton(AGS)with excellent thermal conductivity enhancement efficiency was constructed by the ice tem-plating method and syneresis,and the air-dried graphene phase change composite(AGP)was subse-quently obtained through vacuum-impregnating n-Docosane(C22)into AGS.The syneresis effectively re-duced the phonon scattering between graphene sheets within AGS and increased the density of AGS to 0.1701 g/cm3.Therefore,with a graphene skeleton loading of 23.82 wt.％,AGP exhibited excellent thermal conductivity of 9.867 W/(m K),outstanding electrical conductivity of 68.08 S/cm,and remarkable shape stability.Additionally,AGP demonstrated a melting enthalpy of 188.5 J/g and an outstanding solar-thermal conversion efficiency of 93.98％,showing enormous potential for the utilization of solar energy.
School of Chemistry and Chemical Engineering,Guangdong Provincial Key Lab of Green Chemical Product Technology,South China University of Technology,Guangzhou 510640,China
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