title: High-performance Supercapacitors Based on Electrochemical-induced Vertical-aligned Carbon Nanotubes and Polyaniline Nanocomposite Electrodes.
abstract: Supercapacitors, which store electrical energy through reversible ion on the surface of conductive electrodes have gained enormous attention for variously portable energy storage devices. Since the capacitive performance is mainly determined by the structural and electrochemical properties of electrodes, the electrodes become more crucial to higher performance. However, due to the disordered microstructure and low electrochemical activity of electrode for ion tortuous migration and accumulation, the supercapacitors present relatively low capacitance and energy density. Here we report a high-performance supercapacitor based on polyaniline/vertical-aligned carbon nanotubes (PANI/VA-CNTs) nanocomposite electrodes where the vertical-aligned-structure is formed by the electrochemical-induction (0.75 V). The supercapacitor displays large specific capacitance of 403.3 F g-1, which is 6 times higher than disordered CNTs in HClO4electrolyte. Additionally, the supercapacitor can also present high specific capacitance (314.6 F g-1), excellent cycling stability (90.2% retention after 3000 cycles at 4 A g-1) and high energy density (98.1 Wh kg-1) in EMIBF4organic electrolyte. The key to high-performance lies in the vertical-aligned-structure providing direct path channel for ion faster diffusion and high electrochemical capacitance of polyaniline for ion more accommodation.
authors.affiliation: The State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
authors.forename: Guan
authors.initials: G
authors.lastname: Wu
authors.affiliation: The State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
authors.forename: Pengfeng
authors.initials: P
authors.lastname: Tan
authors.affiliation: i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China.
authors.forename: Dongxing
authors.initials: D
authors.lastname: Wang
authors.affiliation: i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Li
authors.affiliation: The State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
authors.forename: Lu
authors.initials: L
authors.lastname: Peng
authors.affiliation: Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, Anhui 230009, P. R. China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Hu
authors.affiliation: i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China.
authors.forename: Caifeng
authors.initials: C
authors.lastname: Wang
authors.affiliation: i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhu
authors.affiliation: The State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
authors.forename: Su
authors.initials: S
authors.lastname: Chen
authors.affiliation: i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen