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

Date Published
10/2011
Publication Type
Journal Article
Authors
DOI
10.1021/ja206955k
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).

Journal
Journal of the American Chemical Society
Volume
133
Year of Publication
2011
Issue
46
Number
46
Pagination
18522-18525
Short Title
J. Am. Chem. Soc.
Organizations
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