A high performance hybrid asymmetric supercapacitor via nano-scale morphology control of graphene, conducting polymer, and carbon nanotube electrodes

Yue Zhou; Noa Lachman; Mehdi Ghaffari; Haiping Xu; Dhiman Bhattacharya; Pouria Fattahi; Mohammad Reza Abidian; Shan Wu; Karen K. Gleason; Brian L. Wardle; Q. M. Zhang

doi:10.1039/C4TA01785D

A high performance hybrid asymmetric supercapacitor via nano-scale morphology control of graphene, conducting polymer, and carbon nanotube electrodes†

Yue Zhou,^a Noa Lachman,^b Mehdi Ghaffari,^c Haiping Xu,^ad Dhiman Bhattacharya,^e Pouria Fattahi,^f Mohammad Reza Abidian,^f Shan Wu,^a Karen K. Gleason,^e Brian L. Wardle*^b and Q. M. Zhang*^ac

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* Corresponding authors

^a Department of Electrical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA
E-mail: qxz1@psu.edu

^b Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
E-mail: wardle@mit.edu

^c Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA

^d School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China

^e Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

^f Department of Bioengineering and Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA

Abstract

An asymmetric supercapacitor, exploiting ultra-high density aligned activated graphene flakes as the positive electrode and nm-scale conformal coating of a conducting polymer poly(ethylenedioxythiophene) on aligned carbon nanotubes as the negative electrode, is introduced. By complementary tailoring of the asymmetric electrodes, the layered device exhibits a wide 4 V electrochemical window, with the highest power density (149 kW L⁻¹) and energy density (113 Wh L⁻¹) reported thus far for carbon-based supercapacitors.

Journal of Materials Chemistry A

A high performance hybrid asymmetric supercapacitor via nano-scale morphology control of graphene, conducting polymer, and carbon nanotube electrodes†

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A high performance hybrid asymmetric supercapacitor via nano-scale morphology control of graphene, conducting polymer, and carbon nanotube electrodes

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