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A Novel Sustainable Flour Derived Hierarchical Nitrogen‐Doped Porous Carbon/Polyaniline Electrode for Advanced Asymmetric Supercapacitors
Author(s) -
Yu Pingping,
Zhang Zhiming,
Zheng Lingxia,
Teng Feng,
Hu Linfeng,
Fang Xiaosheng
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201601111
Subject(s) - supercapacitor , materials science , polyaniline , carbonization , chemical engineering , capacitance , electrode , electrolyte , nanocomposite , specific surface area , electrochemistry , carbon fibers , in situ polymerization , polymerization , nanotechnology , polymer , composite material , composite number , organic chemistry , catalysis , scanning electron microscope , chemistry , engineering
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 m 2 g −1 ). The specific capacitances of HPC and HPC/PANI (with a surface area of 923 m 2 g −1 ) electrode are 383 and 1080 F g −1 in 1 m H 2 SO 4 , 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 Na 2 SO 4 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).