Issue 43, 2020

Designing a slope-dominated hybrid nanostructure hard carbon anode for high-safety and high-capacity Na-ion batteries

Abstract

Though high capacity and stable cycling of hard carbon anode Na-ion batteries have been achieved, critical safety issues, low discharge potential and unsatisfactory rate performance, present a huge challenge for their practical application. Herein, a slope-dominated mechanism strategy has been designed by preparing hybrid nanostructure carbon materials (HNCs) using a CVD-like method, providing hard carbon with excellent rate performances and high average discharge potential as an anode for Na-ion batteries. The HNCs integrate the advantages of carbon nanotubes and carbon nanosheets, presenting short ion/electron transfer distance and high surface area for abundant active sites. In addition, their microstructural properties including disorder degree and existing state of heteroatom sulfur, can be regulated via different synthetic temperatures providing effective nanovoids and bonding sites. Based on the reaction kinetics analysis, the Na-ion storage mechanism of HNCs can be determined as a capacitive-controlled process, which is essential for improving rate performances. This work demonstrates a novel method to develop a hybrid nanostructure hard carbon, and design of an electrochemical storage mechanism for high-performance and high-safety Na-ion batteries.

Graphical abstract: Designing a slope-dominated hybrid nanostructure hard carbon anode for high-safety and high-capacity Na-ion batteries

Supplementary files

Article information

Article type
Communication
Submitted
09 Gwen. 2020
Accepted
20 Here 2020
First published
26 Here 2020

J. Mater. Chem. A, 2020,8, 22613-22619

Designing a slope-dominated hybrid nanostructure hard carbon anode for high-safety and high-capacity Na-ion batteries

Q. Jin, K. Wang, W. Li, H. Li, P. Feng, Z. Zhang, W. Wang, M. Zhou and K. Jiang, J. Mater. Chem. A, 2020, 8, 22613 DOI: 10.1039/D0TA08895A

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