Design and assembly of reduced graphene oxide/polyaniline/urchin-like mesoporous TiO₂ spheres ternary composite and its application in supercapacitors

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• 作者：Huihui Wang ; Li Ma ; ^{mlsys607@126.com" class="auth_mail" title="E-mail the corresponding author} ; Mengyu Gan ; Tao Zhou ; Xiaowu Sun ; Wenqin Dai ; Huining Wang ; Shiyong Wang
• 关键词：Urchin-like mesoporous TiO2 spheres ; A. Polymer-matrix composites (PMCs) ; A. 3-Dimensional reinforcement ; B. Electrical properties
• 刊名：Composites Part B: Engineering
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：92
• 期：Complete
• 页码：405-412
• 全文大小：2628 K

文摘

A reduced graphene oxide (RGO)/polyaniline (PANI)/urchin-like mesoporous TiO₂ spheres (UMTS) composite has been assembled by an in situ polymerization of PANI with UMTS (synthesis by hydrothermal method) as templates/inset into the GO (graphene oxide) layers/reduction of GO and re-doping process. The preparation process is systematically investigated by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and X-ray diffraction (XRD). The morphologies and microstructures of samples are examined by field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Electrochemical properties are characterized by cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD). The maximum specific capacitance of the composite is as high as 464 F g⁻¹ at a current density of 0.62 A g⁻¹ and retains 73% at a current density of 6.2 A g⁻¹. In addition, the material has a high energy density of 34 Wh kg⁻¹ even at a high power density of 3720 W kg⁻¹ and excellent cycling stability (13.5% capacitance loss after 2000 cycles at the current density of 12.4 A g⁻¹). This good electrochemical performance of RGO/PANI/UMTS can be attributed to the unique structure design, novel UMTS templates and the synergistic effect between RGO and PANI.