Issue 3, 2018

Three-dimensional porous graphene-like sheets synthesized from biocarbon via low-temperature graphitization for a supercapacitor

Abstract

Biocarbons are difficult to graphitize even at 3000 °C. In this study, three-dimensional porous graphene-like sheets (3DPGLS) were directly synthesized from biocarbons at 900 °C. Potassium carbonate was utilized as a catalyst to release graphite microcrystals from the crosslinked sp3 carbon atoms in the hard carbon phase, and subsequently recrystallized them to form graphene layers. The as-obtained 3DPGLS showed a high purity and low defect density, and possessed high conductivity (32.14 S cm−1) and specific surface area (1506.19 m2 g−1). Without conductive additives, the capacitance of 3DPGLS reached 91.15 F g−1 at a current density of 0.2 A g−1 acting as a two-electrode symmetrical supercapacitor electrode material in an organic electrolyte. 85.1% of the initial capacitance was maintained after 5000 cycles at a current density of 0.1 A g−1.

Graphical abstract: Three-dimensional porous graphene-like sheets synthesized from biocarbon via low-temperature graphitization for a supercapacitor

Supplementary files

Article information

Article type
Paper
Submitted
13 Nov 2017
Accepted
20 Dec 2017
First published
20 Dec 2017

Green Chem., 2018,20, 694-700

Three-dimensional porous graphene-like sheets synthesized from biocarbon via low-temperature graphitization for a supercapacitor

J. Xia, N. Zhang, S. Chong, D. Li, Y. Chen and C. Sun, Green Chem., 2018, 20, 694 DOI: 10.1039/C7GC03426A

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