▎ 摘　　要

Self-standing three-dimensional nanocomposite foam of polyaniline (PANI) and reduced graphene oxide (rGO) has been fabricated by a convenient template-directed preparation of rGO and subsequent in situ polymerization of aniline on pre-formed rGO foam, which can be directly used as electrodes for flexible supercapacitors. The nanocomposite foam of PANI@rGO possesses the advantages of self-standing, foam-like high porosity, low density (similar to 8.3 mg cm(-3)), good flexibility and improved durability, which collaboratively lead to superior electrochemical performance, as a result of enhanced charge-transfer and mechanical support afforded by the rGO skeleton. The nanocomposite-based supercapacitor not only displays a high specific capacitance of 701 Fg(-1) at the current density of 1 A g(-1), but also demonstrates improved cycling stability, retaining 92% of its starting capacitance after 1000 charge-discharge cycles. Moreover, the bended symmetric pseudocapacitor based on the flexible nanocomposite foam of PANI@rGO exhibits a high specific capacitance of 285 Fg(-1) at 1 Ag-1, indicating excellent potential for real energy storage in flexible supercapacitors. The approach presented here shows great promise for the development of flexible low-density electrode materials with good potential for applications in portable electronic devices. (c) 2015 Elsevier BM. All rights reserved.