Citation: ZHOU Xiao, SUN Min-Qiang, WANG Geng-Chao. Synthesis and Supercapacitance Performance of Graphene-Supported π-Conjugated Polymer Nanocomposite Electrode Materials[J]. Acta Physico-Chimica Sinica, ;2016, 32(4): 975-982. doi: 10.3866/PKU.WHXB201601281
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Well-dispersed graphene nanosheets (GNS) were prepared by the 60Co γ-ray irradiation reduction technique. On this basis, the hierarchical graphene nanosheet-supported poly(1,5-diaminoanthraquinone) (GNS@PDAA) nanocomposites were synthesized by the chemically oxidative polymerization method using camphor sulfonic acid as both the dopant and soft template. The influence of the DAA/GNS mass ratios on the morphology, chemical structure, and supercapacitance performance for GNS@PDAA nanocomposites was investigated. The structure, morphology, and electrochemical properties of the composites were characterized by Fourier infrared spectroscopy (FTIR), Raman spectroscopy (Raman), atomic force microscope (AFM), energy dispersive spectroscopy (EDS), field emission scanning electron microscopy (FE-SEM), and electrochemical measurements. The results show that for the GNS@PDAA nanocomposite with DAA/GNS mass ratio of 6/1, the PDAA nanoparticles (20-40 nm diameter) are evenly deposited on the surface of GNS, which intercalate a large number of mesopores with 10-30 nmthrough strong π-π stacking and network confinement. As a result, the GNS@PDAA exhibits the highest specific capacitance (398.7 F·g-1 at 0.5 A·g-1), excellent rate capability (71% capacitance retention at 50 A·g-1), and superior cycling stability (only 8.3% capacitance loss after 20000 cycles). Furthermore, based on the GNS@PDAA nanocomposites as both negative and positive electrodes, the as-assembled supercapacitors showed an excellent series/parallel connection effect in aqueous system.
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