Jump to main content
Jump to site search

Issue 23, 2018
Previous Article Next Article

Three-dimensional sp2 carbon networks prepared by ultrahigh temperature treatment for ultrafast lithium–sulfur batteries

Author affiliations

Abstract

The current challenge in the development of high-performance lithium–sulfur (Li–S) batteries is to facilitate the redox kinetics of sulfur species as well as to suppress the shuttle effect of polysulfides, especially at high current rates. Herein, aiming the application of Li–S at high current rates, we coupled a sp2 carbon configuration consisting of 3D carbon nanotubes/graphene prepared by ultrahigh temperature treatment (2850 °C) with S (2850CNTs–Gra–S) for application in Li–S batteries. The 2850CNTs–Gra as the host material exhibits a nearly perfect sp2 hybridized structure because ultrahigh temperature treatment not only repairs the raw defects in CNTs and graphene, but it also forms new sp2 C–C bonds between them. The 3D sp2 carbon network ensures ultrafast ion/electron transfer and efficient heat dissipation to protect the integrity of the separator when the Li–S battery is running at an ultrahigh rate. Based on these unique advantages, the 2850CNTs–Gra–S cathode shows a high current rate performance. Critically, it still delivers a considerable specific capacity after 1500 cycles even at a current rate of 15C and exhibits an extremely low capacity degradation rate of 0.0087% per cycle.

Graphical abstract: Three-dimensional sp2 carbon networks prepared by ultrahigh temperature treatment for ultrafast lithium–sulfur batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Apr 2018, accepted on 08 May 2018 and first published on 12 May 2018


Article type: Paper
DOI: 10.1039/C8NR02983K
Citation: Nanoscale, 2018,10, 10999-11005
  •   Request permissions

    Three-dimensional sp2 carbon networks prepared by ultrahigh temperature treatment for ultrafast lithium–sulfur batteries

    C. Ruan, Z. Yang, H. Nie, X. Zhou, Z. Guo, L. Wang, X. Ding, X. Chen and S. Huang, Nanoscale, 2018, 10, 10999
    DOI: 10.1039/C8NR02983K

Search articles by author

Spotlight

Advertisements