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 | |
Download citation |