Developed composites materials for flexible supercapacitors electrode: “Recent progress & future aspects”

Several materials have attracted attention for potential applications in electronic devices due to their desirable properties, including high power density, extended cycle life, and optimal charge/discharge rate. Hence, it is essential to develop high-efficiency, eco-friendly and effective materials. Due to technological advancements, supercapacitors are produced with high flexibility, which is very effective in achieving both flexibility and high energy storage capacity. The distinguishing point of flexible supercapacitors is their ability to bend, twist, and conform to various shapes and surfaces, enabling integration into flexible and wearable electronics. Composite materials used in flexible supercapacitors typically consist of a combination of conductive materials, such as graphene and a flexible polymer matrix. The flexibility of the polymer matrix enables the device to bend, making it ideal for integration into wearable devices and flexible electronics. In addition, metal oxides offer a wide range of choices for flexible supercapacitor electrodes. Different metal oxides such as ruthenium oxide (RuO2), manganese oxide (MnO2), and nickel oxide (NiO) play significant roles in the development of flexible supercapacitors due to the high specific capacitance. In the present review, we will discuss the tremendous potentialities of various composites applications in flexible supercapacitors. We will show flexible supercapacitors and their impact on supercapacitor performance. Then based on different nanostructures, we summarize the recent findings in electrode materials of flexible supercapacitors. The purpose of this study is to provide the reader with an overview of various flexible electrode composite materials and recent developments.