Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells

Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells

TitleGraphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells
Publication TypeJournal Article
Year of Publication2011
AuthorsLiwen Ji, Mumin Rao, Haimei Zheng, Liang Zhang, Yuanchang Li, Wenhui Duan, Jinghua Guo, Elton J Cairns, Yuegang Zhang
JournalJournal of the American Chemical Society
Volume133
18522
Issue46
Pagination18522-18525
Date Published10/2011
Abstract

The loss of sulfur cathode material as a result of polysulfide dissolution causes significant capacity fading in rechargeable lithium/sulfur cells. Here, we use a chemical approach to immobilize sulfur and lithium polysulfides via the reactive functional groups on graphene oxide. This approach enabled us to obtain a uniform and thin (around tens of nanometers) sulfur coating on graphene oxide sheets by a simple chemical reaction–deposition strategy and a subsequent low-temperature thermal treatment process. Strong interaction between graphene oxide and sulfur or polysulfides enabled us to demonstrate lithium/sulfur cells with a high reversible capacity of 950–1400 mA h g–1, and stable cycling for more than 50 deep cycles at 0.1C (1C = 1675 mA g–1).

DOI10.1021/ja206955k
Short TitleJ. Am. Chem. Soc.