Issue 5, 2018

Synthesis of garlic skin-derived 3D hierarchical porous carbon for high-performance supercapacitors

Abstract

A three-dimensional hierarchical porous carbon is synthesized via a facile chemical activation route with garlic skin as the precursor and KOH as the activating agent. The as-obtained carbon presents a high specific surface area of 2818 m2 g−1 and a hierarchical porous architecture containing macroporous frameworks, mesopores (2–4 nm), and micropores (0.6–1.0 nm). As the electrode material for a supercapacitor, due to its unique interconnected porous structure, this garlic skin-derived carbon exhibits excellent electrochemical performance and cycling stability. At a current density of 0.5 A g−1, the capacitance is up to 427 F g−1 (162 F cm−3). Even at a high current density of 50 A g−1, the capacitance can be maintained to a high value of 315 F g−1 (120 F cm−3). After charging–discharging at a current density of 4.5 A g−1 for 5000 cycles, the capacitance retention is as high as 94%. The results suggest that this garlic skin-derived 3D hierarchical porous carbon is a promising electrode material for high-performance supercapacitors.

Graphical abstract: Synthesis of garlic skin-derived 3D hierarchical porous carbon for high-performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
26 sep 2017
Accepted
27 dec 2017
First published
28 dec 2017

Nanoscale, 2018,10, 2427-2437

Synthesis of garlic skin-derived 3D hierarchical porous carbon for high-performance supercapacitors

Q. Zhang, K. Han, S. Li, M. Li, J. Li and K. Ren, Nanoscale, 2018, 10, 2427 DOI: 10.1039/C7NR07158B

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