A Low-Density Polyethylene-Reinforced Ternary Phase-Change Composite with High Thermal Conductivity for Battery Thermal Management

Yueliang Yu, Hongmei Qin, Shusen Ran, Jinhui Song, Wenlai Xia, Shan Wang () and Chuanxi Xiong ()
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Yueliang Yu: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Hongmei Qin: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Shusen Ran: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Jinhui Song: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Wenlai Xia: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Shan Wang: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Chuanxi Xiong: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

Energies, 2023, vol. 16, issue 9, 1-13

Abstract: Paraffin phase change materials (PCMs) exhibit great potential in battery thermal management (BTM); nevertheless, their application has been hampered by the handicap of low thermal conductivity, leakage, and volume expansion during phase transition. In this work, ternary composite PCMs formed of paraffin, expanded graphite (EG), and low-density polyethylene (LDPE) were developed for application in BTM. The structure and properties of the composite PCMs were characterized via X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, and thermal constant analysis. The result shows that EG can form a large-size graphite frame as heat conduction paths to improve the thermal conductivity of the composite PCM, and LDPE can form an interpenetrating network within the composite PCM to resist the internal stress of paraffin expansion and prevent deformation. The latent heat and thermal conductivity of the composite PCMs loaded with 10 wt% EG and 4 wt% LDPE can reach 172.06 J/g and 3.85 Wm −1 K −1 with a relatively low leakage ratio of 6.2 wt%. Remarkably, the composite PCMs could reduce the temperature rise of the battery by 55.1%. In brief, this work provides a feasible route to develop high-performance PCMs for BTM.

Keywords: phase change material; paraffin; expanded graphite; low-density polyethylene; thermal conductivity; battery thermal management (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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