发明名称 |
GRAPHENE OXIDE AS A SULFUR IMMOBILIZER IN HIGH PERFORMANCE LITHIUM/SULFUR CELLS |
摘要 |
The loss of sulfur cathode material as a result of polysulfide dissolution causes significant capacity fading in rechargeable lithium/sulfur cells. Embodiments of the invention use a chemical approach to immobilize sulfur and lithium polysulfides via the reactive functional groups on graphene oxide. This approach obtains a uniform and thin (˜tens of nanometers) sulfur coating on graphene oxide sheets by a chemical reaction-deposition strategy and a subsequent low temperature thermal treatment process. Strong interaction between graphene oxide and sulfur or polysulfides demonstrate lithium/sulfur cells with a high reversible capacity of 950-1400 mAh g−1, and stable cycling for more than 50 deep cycles at 0.1 C. |
申请公布号 |
EP2761688(A4) |
申请公布日期 |
2015.06.17 |
申请号 |
EP20120835530 |
申请日期 |
2012.09.28 |
申请人 |
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA |
发明人 |
ZHANG, YUEGANG;CAIRNS, ELTON, J.;JI, LIWEN;RAO, MUMIN |
分类号 |
H01M4/583;C01B31/26;C07D303/38;H01M2/16;H01M4/62;H01M10/0566 |
主分类号 |
H01M4/583 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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