Jump to main content
Jump to site search

Issue 22, 2018
Previous Article Next Article

2D porous carbon nanosheets constructed using few-layer graphene sheets by a “medium-up” strategy for ultrahigh power-output EDLCs

Author affiliations

Abstract

2D porous carbon nanosheets (PCNs) occupy the foreground in the field of electric double-layer capacitors (EDLCs). However, the mass production of PCNs with ultrathin thicknesses is still a serious challenge. Herein, PCNs constructed of few-layer graphene sheets were synthesized from a sulfonated pitch (SP) carbon precursor and soft-template F127 by a “medium-up” strategy. SP serves as a “medium material”, while F127 acts as a “string” and “spacer”, which plays the leading role of structure directing and prevents the self-restacking of small graphene layers. After activation, sample PCN6 with high carbon yield is constructed with a thickness of only 1.3 nm, sufficient specific surface area of 3006 m2 g−1 and high e-conductivity of 135 S m−1. By virtue of its unique architecture, the PCN6-based EDLC exhibits excellent energy storage properties. In EMIMBF4 electrolyte, it demonstrates an ultrahigh Cg of 157.8 F g−1 (57.4 F cm−3) at 20 A g−1, possessing a top-level rate capacity C20/0.05 of 86.7%. Simultaneously, its energy density can retain up to 67.1 W h kg−1 at a high power density of 17.5 kW kg−1. The ingenious structural design of PCNs can afford inspiration for constructing other 2D architecture carbon materials.

Graphical abstract: 2D porous carbon nanosheets constructed using few-layer graphene sheets by a “medium-up” strategy for ultrahigh power-output EDLCs

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Mar 2018, accepted on 20 Apr 2018 and first published on 23 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA02308E
Citation: J. Mater. Chem. A, 2018,6, 10331-10339
  •   Request permissions

    2D porous carbon nanosheets constructed using few-layer graphene sheets by a “medium-up” strategy for ultrahigh power-output EDLCs

    P. Chang, K. Matsumura, J. Zhang, J. Qi, C. Wang, T. Kinumoto, T. Tsumura, M. Chen and M. Toyoda, J. Mater. Chem. A, 2018, 6, 10331
    DOI: 10.1039/C8TA02308E

Search articles by author

Spotlight

Advertisements