▎ 摘　　要

NOVELTY - Energy storage film comprises a first layer and a second layer comprising aramid nanofibers (ANFs). A mid-first layer comprising graphene fluoride (GF) disposed between the first layer and the second layer. A third layer comprising aramid nanofibers. A mid-second layer comprising graphene fluoride disposed between the second layer and the third layer. USE - Energy storage film i.e. high-temperature capacitive energy storage film is useful in portable electronic devices, next-generation microelectronics, electric vehicles, and aerospace systems. It is also useful in heat dissipation system. ADVANTAGE - The energy storage film has high-temperature capacitive energy storage properties (high energy density and charge/discharge efficiency), low cost, and high mass-production capability. The aramid nanofibers are crosslinked with phosphonitrilic chloride trimer (PNCT). Thus, the thermal stability of aramid nanofibers is improved, and the energy storage film is capable of operating up to 500℃. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of manufacturing an energy storage film, which involves: (a) preparing a graphene fluoride suspension comprising graphene fluoride; (b) preparing an aramid nanofiber suspension; (c) applying the graphene fluoride suspension on an aramid nanofiber film made of the aramid nanofiber suspension; and (d) casting the aramid nanofiber suspension on the graphene fluoride and performing drying.