To fabricate the polymer-based nanocomposites with excellent energy storage performances for high-temperature applications, hierarchical x wt % Ag@ Al 2 O 3 nanofibers (Ag@AO NFs) are designed and prepared, where various Ag nanoparticles (x wt %) are filled into the Al 2 O 3 nanofibers. By adjusting the weight fraction of Ag nanoparticles, the coupling effects of interfacial polarizations and interfacial barrier at Ag/AO interfaces are explored and optimized; excellent energy storage performance was obtained in the 0.50 wt % Ag@AO/PEI nanocomposite. Owing to the high insulation and high thermal conductivity of Al 2 O 3 nanofibers, a stable energy storage performance is realized within 25−150 °C. For example, the 0.50 wt % Ag@AO/PEI nanocomposite delivers an excellent discharge energy density of 6.1 J/cm 3 with charge−discharge efficiency of 89.2% at 413.4 MV/m, which is twice as large as that of the pure PEI (3.0 J/cm 3 at 382.4 MV/m, 74.6%). This structural design might provide a feasible solution for realizing enhanced energy storage performance at low filler fraction for high-temperature application.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.