Flexible and Free-Standing Reduced Graphene Oxide\nand Polypyrrole Coated Air-Laid Paper-Based Supercapacitor Electrodes

Abstract

Nowadays, the needs\nof bendable energy storage components are growing\nto match with the development of wearable devices. However, it is\nstill a great challenge to fabricate flexible electrodes to keep the\nbalance between the mechanical property and electrochemical performance.\nIn this Article, a two-step simple method is developed to prepare\na type of free-standing paper-based electrodes assembled by polypyrrole,\nreduced graphene oxide, and air-laid paper. The as-obtained hybrid\npaper electrodes are mechanical flexible and lightweight with outstanding\nspecific capacitance (1685 mF cm^–2 at 2 mA cm^–2) and cycling stability (capacitance retention of\n92.8% after cycling for 5000 times). The all-solid-state supercapacitor\nis assembled, which has a remarkable areal capacitance of 1408 mF\ncm^–2, and a high areal energy density of 147 μWh\ncm^–2. These results indicate that the hybrid paper\nhas significant potential for the future wearable energy devices.