Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77749
Title: Enhanced performance of lithium-sulfur batteries with high sulfur loading utilizing ion selective MWCNT/SPANI modified separator
Authors: Shi, L 
Zeng, F
Cheng, X
Lam, KH 
Wang, W
Wang, A
Jin, Z
Wu, F
Yang, Y
Keywords: High sulfur loading
Ion selective
Lithium-sulfur battery
Multiwall carbon nanotube/sulfonated polyaniline-coated separator
Polysulfides shuttle
N–SO3 − groups
Issue Date: 2018
Publisher: Elsevier
Source: Chemical engineering journal, 2018, v. 334, p. 305-312 How to cite?
Journal: Chemical engineering journal 
Abstract: Lithium-sulfur (Li-S) battery has attracted remarkable attention owing to its high theoretical energy density. However, its commercialization is still hampered by the rapid capacity degradation which mainly originates from the polysulfides shuttle between the anode and cathode. In this paper, a functional multiwall carbon nanotube/sulfonated polyaniline (MWCNT/SPANI) modified separator is designed to enhance the electrochemical performance of the Li-S batteries with high sulfur loading. The MWCNT/SPANI-coated separator is highly permselective to Li+ but rejects the transportation of polysulfide anions. Besides, the MWCNT/SPANI coating can also work as an upper current collector and provides channels for electron and ion transport to enhance the sulfur utilization and ensure the reactivation of trapped active materials. With the ion selective MWCNT/SPANI-coated separator, the electrochemical performance of the Li-S batteries based on cathodes with high sulfur loading (5 mg cm−2) and high sulfur content (72 wt%) has been significantly improved. It delivers a reversible capacity of 913 mA h g−1 at the current density of 100 mA g−1 after 100 cycles, much higher than that of the cells with pristine Celgard separator. Hence, the ion selective MWCNT/SPANI modified separator is promising for developing high-performance Li-S batteries employing cathodes with high sulfur loading and high sulfur content.
URI: http://hdl.handle.net/10397/77749
ISSN: 1385-8947
DOI: 10.1016/j.cej.2017.08.015
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

5
Citations as of Sep 11, 2018

WEB OF SCIENCETM
Citations

4
Citations as of Sep 18, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.