An easy one-step electrosynthesis of graphene/polyaniline composites and electrochemical capacitor.

作者：Jiang, Xiaoqing^*; Setodoi, Sunao; Fukumoto, Saki; Imae, Ichiro; Komaguchi, Kenji; Yano, Jun; Mizota, Haruo; Harima, Yutaka

来源：Carbon, 2014, 67: 662-672.

DOI：10.1016/j.carbon.2013.10.055

• GRAPHENE OXIDE
• GRAPHITE OXIDE
• SUPERCAPACITOR ELECTRODES
• SHEETS
• POLYANILINE
• ENERGY
• FILMS
• DISPERSIONS
• REDUCTION
• NANOTUBES

An easy electrochemical technique is proposed to prepare electrochemically reduced graphene oxide (ERGO)/polyaniline (PANI) composites in a single step. The technique uses a two-electrode cell in which a separator soaked with an acid solution is sandwiched between graphene oxide (GO)/aniline films deposited on conductive substrates and an alternating voltage was applied to the electrodes. Successful preparations of ERGO/PANI composites were evidenced by characterizations due to UV-vis-NIR, FT-IR, XPS, XRD, and SEM measurements with free-standing films of ERGO/PANI obtained easily by disassembling the two-electrode cells. The ERGO/PANI films exhibited a high mechanical stability, flexibility, and conductivity (68 S cm(-1) for the composite film containing 80% ERGO) with nanostructured PANI particles (smaller than 20 nm) embedded homogeneously between the ERGO layers. The two-electrode cells acted as electrochemical capacitors (ECs) after a sufficient voltage cycling and exhibited relatively large specific capacitances (195-243 F g(-1) at a scan rate of 100 mV s(-1)) with an excellent cycle life (retention of 83% capacitance after 20,000 charge-discharge cycles). Influences of the GO/aniline ratio, the sort of electrolytes, and the weight of the composite on the energy storage characteristics of ECs comprising the ERGO/PANI composites were also studied.

• 出版日期2014-2
• 单位南京师范大学