A Novel Sustainable Flour Derived Hierarchical Nitrogen-Doped Porous Carbon/Polyaniline Electrode for Advanced Asymmetric Supercapacitors

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• 作者：Pingping Yu ; Zhiming Zhang ; Lingxia Zheng ; Feng Teng ; Linfeng Hu and Xiaosheng Fang
• 刊名：Advanced Energy Materials
• 出版年：2016
• 出版时间：October 26, 2016
• 年：2016
• 卷：6
• 期：20
• 全文大小：2392K
• ISSN：1614-6840

文摘

Hierarchically porous nitrogen-doped carbon (HPC)/polyaniline (PANI) nanowire arrays nanocomposites are synthesized by a facile in situ polymerization. 3D interconnected honeycomb-like HPC was prepared by a cost-effective route via one-step carbonization using urea and alkali-treated wheat flour as carbon precursor with a high specific surface area (1294 m² g⁻¹). The specific capacitances of HPC and HPC/PANI (with a surface area of 923 m² g⁻¹) electrode are 383 and 1080 F g⁻¹ in 1 m H₂SO₄, respectively. Furthermore, an asymmetric supercapacitor based on HPC/PANI as positive electrode and HPC as negative electrode is successfully assembled with a voltage window of 0–1.8 V in 1 m Na₂SO₄ aqueous electrolyte, exhibiting high specific capacitance (134 F g⁻¹), high energy density (60.3 Wh kg⁻¹) and power density (18 kW kg⁻¹), and excellent cycling stability (91.6% capacitance retention after 5000 cycles).