期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 46, 页码 18522-18525出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja206955k
关键词
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资金
- Office of Science, Office of Basic Energy Sciences, the United States Department of Energy [DE-AC02-05CH11231]
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)).
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