“…[29,30] In comparison with other carbon materials, CB is a promising active material because of its high specific surface area, superior conductivity, stable physicochemical properties, reinforcing action, low cost and broad potential. [31] Much work has been dedicated to the study of polyimide (PI)-based composites owing to the outstanding properties of polyimide, such as high thermal-oxidative stability, [32,33] solvent resistance, [34] superior tensile modulus [35,36] and excellent environmental stability. In recent years, it was found that this kind of materials can undergo reversible electrochemical reaction, which provides a theoretical basis for the preparation of PI-based electrochemical energy storage devices.…”