title: A scalable graphene sulfur composite synthesis for rechargeable lithium batteries with good capacity and excellent columbic efficiency.
abstract: 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 ∼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.
authors.affiliation: Department of Mechanical Engineering, University of Wisconsin , Milwaukee, Wisconsin 53201, United States.
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Gao
authors.forename: Jianyang
authors.initials: J
authors.lastname: Li
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Guan
authors.forename: Chris
authors.initials: C
authors.lastname: Yuan