Amylopectin Wrapped Graphene Oxide/Sulfur for Improved Cyclability of Lithium-Sulfur Battery

作者：Zhou Weidong; Chen Hao; Yu Yingchao; Wang Deli; Cui Zhiming; DiSalvo Francis J; Abruna Hector D^*

来源：ACS Nano, 2013, 7(10): 8801-8808.

DOI：10.1021/nn403237b

• Li-S
• battery
• cathode
• amylopectin
• graphene oxide

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).

• 出版日期2013-10