Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 21st October 2020 from 07:00 AM to 07:00 PM (BST).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 7, 2013
Previous Article Next Article

Improved lithium–sulfur cells with a treated carbon paper interlayer

Author affiliations

Abstract

A simple, low-cost modification of lithium–sulfur (Li–S) cells by placing a treated carbon paper between the sulfur electrode and the separator has been investigated to significantly improve the performance of Li–S cells. The treated carbon paper was prepared by an alcohol-alkaline/thermal treatment of a commercial Toray carbon paper, introducing hydroxyl functional groups and micro-cracks on the carbon fibers in the carbon paper, which enhances the hydrophilicity and increases surface areas of the carbon paper matrix. The modified Li–S cells deliver a higher initial capacity of 1651 mAh g−1 at 1.5–2.8 V at a rate of C/5 compared to the cells without any interlayer or with an untreated carbon paper interlayer. The cells with the treated carbon paper offer additional improvement in performance when the discharge cut-off voltage is raised to 1.8 V: 1057, 1002, and 929 mAh g−1 after 100 cycles, respectively, at C/5, C/2, and 1 C rates. The improved cell performance is attributed to the 3D architecture of the carbon paper interlayer, serving as a conductive skeleton for trapping and depositing dissolved sulfur-containing active materials, as confirmed by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The novel configuration presented here offers a low-cost approach to overcome the persistent problems of Li–S cells.

Graphical abstract: Improved lithium–sulfur cells with a treated carbon paper interlayer

Back to tab navigation

Supplementary files

Article information


Submitted
26 Sep 2012
Accepted
07 Dec 2012
First published
07 Dec 2012

Phys. Chem. Chem. Phys., 2013,15, 2291-2297
Article type
Paper

Improved lithium–sulfur cells with a treated carbon paper interlayer

C. Zu, Y. Su, Y. Fu and A. Manthiram, Phys. Chem. Chem. Phys., 2013, 15, 2291
DOI: 10.1039/C2CP43394J

Social activity

Search articles by author

Spotlight

Advertisements