Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Functionalized N-doped hollow carbon spheres as sulfur host with enhanced electrochemical performances of lithium-sulfur batteries

Functionalized N-doped hollow carbon spheres as sulfur host with enhanced electrochemical... A novel composite, functionalized N-doped hollow carbon spheres (F-NHCS), is proposed as cathode host for improving the cycle stability and rate capability of a Li-S battery, which involves the functionalization of NHCS with oxygen-containing groups. The high electronic conductivity and abundant oxygen-containing functional groups of F-NHCS can not only be served as the conductive matrix for loading S as the cathode (F-NHCS-S) but also exhibit strong absorption capability to anchor S atoms and thus effectively solve the dissolution issue of intermediates polysulfides during cycling. As a result, the as-obtained F-NHCS-S cathode exhibits excellent performances: delivering an initial specific capacity of 827 mAh g−1 at 0.2 C with about 74 wt% S loading and retaining a specific capacity of 549 mAh g−1 after 100 cycles, compared to the respective 747 mAh g−1 and 182 mAh g−1 of the cathode based on the host without N-doping and functionalization (HCS-S). The fabrications of the hosts and the corresponding cathodes are demonstrated by the physical characterizations from SEM, TEM, XPS, XRD, FT-IR, BET, and TGA. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Functionalized N-doped hollow carbon spheres as sulfur host with enhanced electrochemical performances of lithium-sulfur batteries

Download PDF
9 pages

Loading next page...
 
/lp/springer-journals/functionalized-n-doped-hollow-carbon-spheres-as-sulfur-host-with-bZqIwCCv0E

References (56)

Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-018-2729-6
Publisher site
See Article on Publisher Site

Abstract

A novel composite, functionalized N-doped hollow carbon spheres (F-NHCS), is proposed as cathode host for improving the cycle stability and rate capability of a Li-S battery, which involves the functionalization of NHCS with oxygen-containing groups. The high electronic conductivity and abundant oxygen-containing functional groups of F-NHCS can not only be served as the conductive matrix for loading S as the cathode (F-NHCS-S) but also exhibit strong absorption capability to anchor S atoms and thus effectively solve the dissolution issue of intermediates polysulfides during cycling. As a result, the as-obtained F-NHCS-S cathode exhibits excellent performances: delivering an initial specific capacity of 827 mAh g−1 at 0.2 C with about 74 wt% S loading and retaining a specific capacity of 549 mAh g−1 after 100 cycles, compared to the respective 747 mAh g−1 and 182 mAh g−1 of the cathode based on the host without N-doping and functionalization (HCS-S). The fabrications of the hosts and the corresponding cathodes are demonstrated by the physical characterizations from SEM, TEM, XPS, XRD, FT-IR, BET, and TGA.

Journal

Ionics – Springer Journals

Published: Oct 2, 2018

There are no references for this article.