title: Efficient Fabrication of Hierarchically Porous Graphene-Derived Aerogel and Its Application in Lithium Sulfur Battery.
abstract: Hierarchically porous carbon/graphene aerogel (CGA) with relatively high surface area and pore volume is synthesized through an efficient fabrication strategy, which involves forming hydrothermal carbon layer on the pore wall as upholder and directly carbonizing the wet hydrogel from hydrothermal reaction, without using any special drying techniques. Cassava powder is used as carbon precursor which enables sustainable synthesis. Carbonizing the wet hydrothermal product is found to be a self-activation process, through which abundant pores are generated. The aerogel is used as host to encapsulate sulfur for lithium sulfur battery. Graphene, served as highly conductive scaffold, accelerates the transport of the electrons. The hierarchically porous structure is in favor of improving the electrochemical performance of lithium sulfur battery. Therefore, the cathode with high sulfur loading and high sulfur content can deliver very good performance.
authors.affiliation: School of Materials Science and Engineering, Central South University , Changsha 410083, China.|School of Metallurgy & Environment, Central South University , 410083, Changsha, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.affiliation: School of Metallurgy & Environment, Central South University , 410083, Changsha, China.
authors.forename: Furong
authors.initials: F
authors.lastname: Qin
authors.affiliation: School of Metallurgy & Environment, Central South University , 410083, Changsha, China.
authors.forename: Yanqing
authors.initials: Y
authors.lastname: Lai
authors.affiliation: School of Metallurgy & Environment, Central South University , 410083, Changsha, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Metallurgy & Environment, Central South University , 410083, Changsha, China.
authors.forename: Xiaoke
authors.initials: X
authors.lastname: Lei
authors.affiliation: School of Metallurgy & Environment, Central South University , 410083, Changsha, China.
authors.forename: Mengran
authors.initials: M
authors.lastname: Wang
authors.affiliation: Engineering Research Center of High Performance Battery Materials and Devices, Research Institute of Central South University in Shenzhen , Shenzhen 518057, China.
authors.forename: Hai
authors.initials: H
authors.lastname: Lu
authors.affiliation: School of Metallurgy & Environment, Central South University , 410083, Changsha, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Fang
keywords: aerogel; cassava; graphene; hierarchically porous; lithium sulfur battery