Flexible Solid‐State Supercapacitors with Enhanced Performance from Hierarchically Graphene Nanocomposite Electrodes and Ionic Liquid Incorporated Gel Polymer Electrolyte

• DOI: 10.1002/adfm.201704463
• Publication Date: 2017-11-27T07:54:47Z
• Authors: Lanxiang Feng; Kai Wang; Xiong Zhang; Xianzhong Sun; Chen Li; Xingbo Ge; Yanwei Ma
• Keywords: Quasi-solid

Abstract High energy density, durability, and flexibility of supercapacitors are required urgently for the next generation wearable portable electronic devices. Herein, a novel strategy is introduced to boost density flexible soild‐state via rational design hierarchically graphene nanocomposite (GNC) electrode material employing an ionic liquid gel polymer electrolyte. The hierarchical consisting polyaniline‐derived carbon synthesized as scalable process. meso/microporous nanocomposites exhibit high specific capacitance 176 F g −1 at 0.5 A in 1‐ethyl‐3‐methylimidazolium tetrafluoroborate (EMIBF 4 ) with wide voltage window 3.5 V, good rate capability 80.7% range 0.5–10 excellent stability over 10 000 cycles, which attributed superior conductivity (7246 S m ), quite large surface area (2416 2 well meso/micropores distribution materials. Furthermore, solid‐state supercapacitor devices based on GNC electrodes electrolyte film assembled, offer 180 1 , 75 Wh Kg remarkable performance under consecutive bending conditions.