Preparation and property of aluminum honeycomb-enhanced expanded graphite/paraffin wax composite material
Li Jinghui1, Jiang Guiwen2, Huang Juhua1
1.Department of Materials Forming & controlling Engineering,Nanchang University, Nanchang 330031; 2.School of Physics and Electronic Information,Shangrao Normal College,Shangrao 330041
Abstract: A new kind of aluminum honeycomb-enhanced expanded graphite (EG)/paraffin wax (PW) composite material was prepared for Li-ion battery thermal management,in which PW was chosen as phase change material,EG as the promoter of thermal conductivity and shape-stabilized material,and aluminum honeycomb as the material-enhanced in terms of thermal conductivity and structural strength.The phase and chemical structure,and phase transition behavior of EG/PW were analyzed by XRD,FT-IR and DSC.The thermal conductivity and structural strengthen of composite were measured.The effect of EG/PW on controlling temperature rising of Li-ion battery was investigated.The results showed that:there was no chemical reaction between EG and PW.The phase change latent heat of EG/PW was a little lower than the calculated value based on the mass fraction of PW,and its super-cooling was also decreased in comparison with that of PW.The thermal conductivity of EG/PCM increased with an increase in EG content.Compared to PW,EG/PW composite exhibited outstanding temperature-controlling performance for Li-ion battery.
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