Issue 13, 2019

Adsorption dominant sodium storage in three-dimensional coal-based graphite microcrystal/graphene composites

Abstract

Low-cost three-dimensional coal-based graphite microcrystal/graphene composites (3D-CGC/G) were synthesized via a one-step hydrothermal method. The high content of various oxygen functional groups and defects in this 3D architecture, induced by the graphite microcrystal, can provide plentiful reactive sites to adsorb Na+, while insertion and pore-filling of Na+ are negligible in this material. The high capacitance contribution (50.5–83.5%) of 3D-CGC/G suggests that the induced oxygen functional groups on the carbon surface could rapidly capture Na+ through a fast surface redox reaction at large current density, leading to good rate performance. When used as a sodium ion battery anode, the 3D-CGC/G1 composite exhibits a good reversible specific capacity of 254 mA h g−1 after 350 different electrochemical rate cycles and 101 mA h g−1 at 2 A g−1 after 2000 cycles, demonstrating the good rate performance and electrochemical stability of coal-based carbon materials.

Graphical abstract: Adsorption dominant sodium storage in three-dimensional coal-based graphite microcrystal/graphene composites

Supplementary files

Article information

Article type
Paper
Submitted
14 Dec 2018
Accepted
28 Feb 2019
First published
01 Mar 2019

J. Mater. Chem. A, 2019,7, 7565-7572

Adsorption dominant sodium storage in three-dimensional coal-based graphite microcrystal/graphene composites

M. Kang, H. Zhao, J. Ye, W. Song, H. Shen, J. Mi and Z. Li, J. Mater. Chem. A, 2019, 7, 7565 DOI: 10.1039/C8TA12062E

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