期刊
ACS NANO
卷 7, 期 10, 页码 8801-8808出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn403237b
关键词
Li-S; battery; cathode; amylopectin; graphene oxide
类别
资金
- Department of Energy [DE-FG02-87ER45298]
- Energy Materials Center at Cornell [EMC2]
- Energy Frontier Research Center
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0001086]
- Cornell Center for Materials Research (CCMR) with support from the National Science Foundation Materials Research Science and Engineering Centers (MRSEC) program [DMR 1120296]
- U.S. Department of Energy (DOE) [DE-FG02-87ER45298] Funding Source: U.S. Department of Energy (DOE)
An amylopectin wrapped graphene oxide-sulfur composite was prepared to construct a 3-dimensionally cross-linked structure through the interaction between amylopectin and graphene oxide, for stabilizing lithium sulfur batteries. With the help of this cross-linked structure, the sulfur particles could be confined much better among the layers of graphene oxide and exhibited significantly improved cyclability, compared with the unwrapped graphene oxide-sulfur composite. The effect of the electrode mass loading on electrochemical performance was investigated as well. In the lower sulfur mass loading cells, such as 2 mg cm(-2), both the capacity and the efficiency were obviously better than those of the higher sulfur mass loading cells, such as 6 mg cm(-2).
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