Graphene-Wrapped Polyaniline Nanowire Arrays on Nitrogen-Doped Carbon Fabric as Novel Flexible Hybrid Electrode Materials for High-Performance Supercapacitor

• Published in: Langmuir Vol. 30; no. 18; pp. 5306 - 5313
• Main Authors: Yu, Pingping, Li, Yingzhi, Zhao, Xin, Wu, Lihao, Zhang, Qinghua
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 13.05.2014
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la404765z

We report the synthesis of reduced graphene oxide (RGO) sheet wrapped polyaniline (PANI) nanowire arrays grown on nitrogen-doped carbon fiber cloth (eCFC). The RGO coating layer is important to accommodate volume change and mechanical deformation of the coated PANI nanowires arrays during the long-term charge/discharge processes. The resulting hierarchical symmetric supercapacitor based on RGO/PANI/eCFC composites shows an enhanced capacitive behavior with a maximum energy density of 25.4 Wh kg–1, a maximum power density of 92.2 kW kg–1 and a specific capacitance of 1145 F g–1, which is higher than that of PANI/eCFC (1050 F g–1) and GO/PANI/eCFC (940 F g–1). Moreover, the assembled supercapacitor exhibits excellent charge/discharge rates and a good cycling stability, retaining over 94% of its initial capacitance after 5000 cycles.