Nanoencapsulation of Silicon Carbide-Doped Hydrated Salt for Safe and High-Efficient Battery Thermal Management

Abstract

Herein, silicon carbide (SiC)-doped hydrated salt phase change nanocapsules (NePCMs) with enhanced thermal conductivity and nonflammability were synthesized using a simple method for battery thermal management systems (BTMs). The additional amount of SiC played a critical role in the heat capacities of hydrated salt nanocapsules. The resultant phase change nanocapsules have a latent heat of over 145.6 kJ/kg, good encapsulation of around 60%, thermal conductivity of 0.51 W m–1 K–1, as well as good leak-proof property and thermal cycle stability. More importantly, due to the perfect core–shell structure, the hydrated salt nanocapsules exhibited a significant enhancement in corrosion protection and flame-retardant property. High-rate charging test at ambient temperature showed that the NePCMs cooling was able to maintain a low maximum temperature during the melting process and keep the battery temperature within a safe range. In conclusion, the phase change nanocapsules developed in this work may have great promise in the field of safe and high-efficient battery thermal management.

Enhanced Thermal Conductivity of Phase Change Microcapsules Based on Boron Nitride/Graphene Oxide Composite Sheets

“…3 For instance, as intermediate energy storage media, the TES systems can improve the harvesting efficiency of intermittent clean solar and wind energy as well as the utilization of off-peak electricity; as thermal management systems, the TES systems can adjust the temperature of textiles and buildings to a comfortable range, thus reducing energy consumption. So far, TES materials have been widely applied in many advanced military and civil fields, such as personal thermal management, 4,5 newenergy batteries, 6 solar−thermal conversion systems, 7 electronic devices, 3 infrared stealth, 8 wearable applications, 9 and buildings. 10 As one of the most widely used TES materials, latent heat storage materials, namely, phase change materials (PCMs), have attracted intensive interest, thanks to their unique high energy storage and thermostatic capacities.…”

Polyurethane Foam Skeleton-Based Phase Change Hydrogel for Efficient Battery Thermal Management with Favorable Antivibration Performance

“…One of the mainstream methods for optimizing battery packs is through the utilization of thermal management materials (TMMs). , Phase change materials (PCMs) are promising candidates due to their excellent heat absorption and release capabilities during phase transitions . Inorganic PCMs possess the benefits of high latent heat of phase change, high thermal conductivity, and low cost; , however, they have some drawbacks such as supercooling, phase separation, and strong corrosion . Most significantly, their phase transition temperature does not align with the practical operating temperature of the batteries .…”