Issue 15, 2014

Porous nitrogen-doped hollow carbon spheres derived from polyaniline for high performance supercapacitors

Abstract

Porous nitrogen-doped hollow carbon spheres (PNHCS) had been prepared by pyrolysis of hollow polyaniline spheres (HPS), which were synthesized by the use of sulfonated polystyrene spheres (SPS) as a hard template. PNHCS have a specific surface area of 213 m2 g−1 and a pore volume of 0.24 cm3 g−1. At a current density of 0.5 A g−1, the specific capacitance of the PNHCS prepared is ca. 213 F g−1. The capacity retention after 5000 charge/discharge cycles at a current density of 1 A g−1 is more than 91%. The enhanced electrochemical performance can be attributed to the unique carbon nanostructure and nitrogen-doping of the PNHCS electrodes. The hollow macro-structure plays the role of an “ion-buffering” reservoir. The micropores of the PNHCS enlarge the specific surface area, while the mesopores offer larger channels for liquid electrolyte penetration. Nitrogen groups in the PNHCS not only improve the wettability of the carbon surface, but also enhance the capacitance by addition of a pseudocapacitive redox process.

Graphical abstract: Porous nitrogen-doped hollow carbon spheres derived from polyaniline for high performance supercapacitors

Article information

Article type
Paper
Submitted
18 ডিসে. 2013
Accepted
27 জানু. 2014
First published
28 জানু. 2014

J. Mater. Chem. A, 2014,2, 5352-5357

Author version available

Porous nitrogen-doped hollow carbon spheres derived from polyaniline for high performance supercapacitors

J. Han, G. Xu, B. Ding, J. Pan, H. Dou and D. R. MacFarlane, J. Mater. Chem. A, 2014, 2, 5352 DOI: 10.1039/C3TA15271E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements