A Novel Sustainable Flour Derived Hierarchical Nitrogen‐Doped Porous Carbon/Polyaniline Electrode for Advanced Asymmetric Supercapacitors |
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| Authors: | Pingping Yu Zhiming Zhang Lingxia Zheng Feng Teng Linfeng Hu Xiaosheng Fang |
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| Affiliation: | Department of Materials Science, Fudan University, Shanghai, China |
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| Abstract: | 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). |
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| Keywords: | asymmetric supercapacitor biomass sources hierarchical porous carbon polyaniline nanowires |
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