Issue 19, 2016

2D quasi-ordered nitrogen-enriched porous carbon nanohybrids for high energy density supercapacitors

Abstract

Two-dimensional (2D) quasi-ordered nitrogen-enriched porous carbon (QNPC) nanohybrids, with the characteristics of an ultrathin graphite nanosheet framework and thick quasi-ordered nitrogen-doped carbon cladding with a porous texture, have been synthesized via an in situ polymerization assembly method. In the synthesis, the expandable graphite (EG) is enlarged by an intermittent microwave method, and then aniline monomers are intercalated into the interlayers of the expanded EG with the assistance of a vacuum. Subsequently, the intercalated aniline monomers could assemble on the interlayer surface of the expanded EG, accompanied by the in situ polymerization from aniline monomers to polyaniline. Meanwhile, the expanded EG could be exfoliated to graphite nanosheets. By subsequent pyrolysis and activation processes, the QNPC nanohybrids could be prepared. As supercapacitor electrodes, a typical QNPC12-700 sample derived from the precursor containing an EG content of 12%, with a high level of nitrogen doping of 5.22 at%, offers a high specific capacitance of 305.7 F g−1 (1 A g−1), excellent rate-capability and long-term stability. Notably, an extremely high energy density of 95.7 Wh kg−1 at a power density of 449.7 W kg−1 in an ionic liquid electrolyte can be achieved. The unique structural features and moderate heteroatom doping of the QNPC nanohybrids combines electrochemical double layer and faradaic capacitance contributions, which make these nanohybrids ideal candidates as electrode materials for high-performance energy storage devices.

Graphical abstract: 2D quasi-ordered nitrogen-enriched porous carbon nanohybrids for high energy density supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
06 2月 2016
Accepted
14 4月 2016
First published
14 4月 2016

Nanoscale, 2016,8, 10166-10176

2D quasi-ordered nitrogen-enriched porous carbon nanohybrids for high energy density supercapacitors

K. Kan, L. Wang, P. Yu, B. Jiang, K. Shi and H. Fu, Nanoscale, 2016, 8, 10166 DOI: 10.1039/C6NR01094F

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