Jump to main content
Jump to site search

Issue 23, 2013
Previous Article Next Article

Infiltrating sulfur in hierarchical architecture MWCNT@meso C core–shell nanocomposites for lithium–sulfur batteries

Author affiliations

Abstract

We present hierarchical architecture MWCNT (multi-walled carbon nanotubes)@meso C core–shell nanostructures as a carbon matrix for effective trapping of sulfur/polysulfides as a cathode material for Li–S batteries. The unique structure of MWCNT@meso C core–shell nanocomposites was achieved by using a sol–gel coating method followed by nanocasting. By infiltrating sulfur into the matrix, S/MWCNT@meso C core–shell nanocomposites were achieved. This material exhibited an initial discharge capacity of 1248 mA h g−1 although it decayed to about 640 mA h g−1 after 50 cycles. However, this performance is much better than that of S directly deposited on MWCNT (S/MWCNT) which only retained a capacity of 120 mA h g−1 after 50 cycles. Our composite exhibited excellent rate capability even at a discharge current density of 2 A g−1. The improvement in electrochemical performance is attributed to the synergetic effect between MWCNT cores, which provide electronic conduction pathways, and the mesoporous carbon shells with a relatively high surface area, which can trap sulfur/polysulfides and provide Li+ ion pathways.

Graphical abstract: Infiltrating sulfur in hierarchical architecture MWCNT@meso C core–shell nanocomposites for lithium–sulfur batteries

Back to tab navigation

Article information


Submitted
11 Apr 2013
Accepted
11 Apr 2013
First published
12 Apr 2013

Phys. Chem. Chem. Phys., 2013,15, 9051-9057
Article type
Communication

Infiltrating sulfur in hierarchical architecture MWCNT@meso C core–shell nanocomposites for lithium–sulfur batteries

D. Wang, Y. Yu, W. Zhou, H. Chen, F. J. DiSalvo, D. A. Muller and H. D. Abruña, Phys. Chem. Chem. Phys., 2013, 15, 9051
DOI: 10.1039/C3CP51551F

Social activity

Search articles by author

Spotlight

Advertisements