▎ 摘　　要

Flexible supercapacitors based on bendable electrodes have aroused much interest for integration in clothing materials and portable electronic devices. However, simultaneous achievement of high areal energy and high power densities still presents a great challenge. Herein we report the fabrication of free-standing, flexible graphene papers suitable for high-performance flexible supercapacitors. The binder-free graphene paper is made up of two types of holey graphene units (i.e., wrinkled graphene sheets and graphene nanoscrolls) that produce closely interconnected, porous 3D graphene architectures. The graphene papers reported here can be fabricated with a variety of thicknesses and areal densities, in the 10-70m and 1-5mgcm(-2) ranges, respectively. They exhibit a remarkable electrochemical performance in aqueous electrolytes: a)a high cell areal capacitance (230-190mFcm(-2) in H2SO4 and 180-170mFcm(-2) in Li2SO4), b)an outstanding capacitance retention of 60% at ultra-large current densities of 1200mAcm(-2), c)an excellent long-term cycling stability and d)high areal power (approximate to 280mWcm(-2)) and energy densities (approximate to 32 and approximate to 60Whcm(-2) in H2SO4 and Li2SO4, respectively). These highly flexible graphene papers show a great improvement, in terms of areal energy-power densities, in relation to the state-of-the-art graphene-based film electrodes.