Hefei University of Technology announced on the 12th that: The school's scientific research team successfully prepared a graphene film and successfully assembled it into an all-solid-state flexible supercapacitor. This flexible supercapacitor can provide a safe and efficient power source for wearable devices. The key equipment of a new generation of flexible electronic devices. Relevant results were published on the 12th in the internationally renowned academic journal "Chemistry".
According to reports, graphene is an ideal material for new types of energy storage devices due to its excellent optical, electrical, thermal, and mechanical properties. However, due to the weak interface between graphene nanosheets and the lack of an effective assembly method, R&D has Ultra-thin, transparent, self-supporting graphene films, and as all-solid-state flexible supercapacitors still face enormous challenges.
The school's research team and its collaborators have used macro-scale nano-assembly technology to successfully prepare a high-strength, self-supporting, ultra-thin transparent graphene film.
According to reports, the film consists of only two layers of graphene oxide monolayers, with a thickness of only 22 nanometers. It can be self-supported without the need for auxiliary materials, and it can be used to control thickness and performance by increasing or decreasing the number of monolayers. At the same time, the film has a horizontal dimension of centimeters, with tailorability and excellent stretchability.
The experimental results show that the new film can not only maintain excellent mechanical properties and optical properties, but also the all-solid-state flexible supercapacitor assembled from it has a high volume capacitance value, good electromechanical stability, and exhibits excellent super Capacitor performance. After 7500 cycles of charge and discharge, the film capacitance value remains as high as 91.4%.
