Issue 20, 2020

N-Doped graphitic ladder-structured carbon nanotubes as a superior sulfur host for lithium–sulfur batteries

Abstract

Lithium–sulfur (Li–S) batteries have been becoming a new generation of secondary batteries due to their high theoretical energy density. Regarding sulfur-based cathodes, they not only help to strengthen the utilization of sulfur, but also effectively immobilize polysulfides to alleviate their dissolution and diffusion. Herein, a new confinement strategy is initiated by a distinctive sulfur scaffold, namely nitrogen doped graphitic ladder-structured carbon nanotubes (NGLCNTs) loaded with appropriate amount of metallic cobalt nanoparticles. Benefiting from both the unique graphitic ladder-structure and metallic cobalt nanoparticles in the nitrogen doped carbon nanotubes, the NGLCNTs host not only promotes ion transfer and electron transmission during the redox reactions from higher-order polysulfides to Li2S2/Li2S, but also efficiently restricts the outward diffusion and dissolution of polysulfides as well as benefits the nucleation and growth of Li2S. As a result, the NGLCNTs/S cathode has successfully overcome the crucial issues, and it exhibits greatly enhanced electrochemical performances with excellent rate capabilities of up to 8C and long term cycling life of over 500 cycles.

Graphical abstract: N-Doped graphitic ladder-structured carbon nanotubes as a superior sulfur host for lithium–sulfur batteries

Supplementary files

Article information

Article type
Research Article
Submitted
10 Jun 2020
Accepted
05 Aug 2020
First published
05 Aug 2020

Inorg. Chem. Front., 2020,7, 3969-3979

N-Doped graphitic ladder-structured carbon nanotubes as a superior sulfur host for lithium–sulfur batteries

R. Luo, B. Xi, R. Wei, W. Chen, X. Ma, Z. Feng, J. Feng and S. Xiong, Inorg. Chem. Front., 2020, 7, 3969 DOI: 10.1039/D0QI00678E

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