Facile Preparation of Silver‐decorated Graphene in Polyvinylidene Fluoride for Highly Enhanced Thermal Conductivity

Abstract Polyvinylidene fluoride (PVDF) is a highly non‐reactive thermoplastic fluoropolymer, which is widely used for lithium battery diaphragm coating. However, the temperature of working environment will be increased because of the heat generated by the battery during operation, it is urgent to prepare PVDF polymer composites with high thermal conductivity. Herein, we reported a simple and rapid “one‐pot” method for preparing silver nanoparticles (AgNP) modified graphene through in‐situ growth of AgNP between the gaps of graphene nanosheets (GNs). Moreover, the thermal conductivity of GNs/Ag powder was higher than that of GNs. Furthermore, GNs/Ag showed excellent thermal conductivity when it was mixed with PVDF, and the highest thermal conductivity of 0.679 W/(mK) was obtained for graphene/silver‐polyvinylidene fluoride (GNs/Ag‐PVDF) nanocomposites, which was 2.22 times as high as that of pure PVDF. This work will provide a promising solution to solve the problem of heat dissipation for lithium batteries and other electronic components during practical application.