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

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