A Scalable Graphene Sulfur Composite Synthesis for Rechargeable Lithium Batteries with Good Capacity and Excellent Columbic Efficiency

作者：Gao Xianfeng; Li Jianyang; Guan Dongsheng; Yuan Chris^*

来源：ACS Applied Materials & Interfaces, 2014, 6(6): 4154-4159.

DOI：10.1021/am4057979

• scalable synthesis
• graphene-sulfur composite
• Li-S battery
• high columbic efficiency
• energy storage

Sulfur nanoparticles wrapped with a conductive graphene framework was synthesized with a high sulfur loading through a scalable one-step process. The graphene-coated sulfur nanostructured composite, when used as cathode for lithium sulfur battery, shows a reversible capacity of 808 mAh g(-1) at a rate of 210 mA g(-1) and an average columbic efficiency of similar to 98.3% over 100 cycles. It is found that graphene oxide (GO) with a porous structure offers flexible confinement function that helps prevent the loss of active materials, thus extending the cycling life of the electrode. Moreover, reduced graphene oxide provides a conductive network surrounding the sulfur particles, which facilitates both electron transport and ion transportation. This novel one-step, all-solution-based process is scalable and provides a promising approach for potential industrial applications.

• 出版日期2014-3-26