Bead-like PCM composite network with reinforced heat storage performance for highly efficient battery cooling

Abstract

High-performance heat storage phase change materials (PCMs) is urgently required for modern thermal-management device, like Li-ion battery in electrical vehicle. Driven by the unmet needs to develop promising PCM composite with high stability, thermal conductivity and loading capacity simultaneously, unique bead-like three-dimensional network support as biMOF (ZIF67@ZIF8) particles encapsulated in carbon fibers was introduced for loading lauric acid. Carbon fibers from electric-spinning strung dispersed biMOF-C particles and constructed 3D network to facilitate heat transfer. Furthermore, biMOF structure and carbon fiber encapsulation worked synergistically to improve PCM loading capacity. Consequently, the obtained PCM composite exhibited high latent heat (132.5 J/g) and thermal conductivity (2.5 W/mk), which worked efficiently to decrease single battery temperature by 3.2 °C and improve charge-discharge performance by 15.7 %.