title: In Situ Activation of Nitrogen-Doped Graphene Anchored on Graphite Foam for a High-Capacity Anode.
abstract: We report the fabrication of a three-dimensional free-standing nitrogen-doped porous graphene/graphite foam by in situ activation of nitrogen-doped graphene on highly conductive graphite foam (GF). After in situ activation, intimate "sheet contact" was observed between the graphene sheets and the GF. The sheet contact produced by in situ activation is found to be superior to the "point contact" obtained by the traditional drop-casting method and facilitates electron transfer. Due to the intimate contact as well as the use of an ultralight GF current collector, the composite electrode delivers a gravimetric capacity of 642 mAh g(-1) and a volumetric capacity of 602 mAh cm(-3) with respect to the whole electrode mass and volume (including the active materials and the GF current collector). When normalized based on the mass of the active material, the composite electrode delivers a high specific capacity of up to 1687 mAh g(-1), which is superior to that of most graphene-based electrodes. Also, after ∼90 s charging, the anode delivers a capacity of about 100 mAh g(-1) (with respect to the total mass of the electrode), indicating its potential use in high-rate lithium-ion batteries.
authors.affiliation: College of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, China.
authors.forename: Junyi
authors.initials: J
authors.lastname: Ji
authors.affiliation: Institute of Chemical and Engineering Sciences, A*STAR , 1 Pesek Road, Jurong Island, 627833 Singapore.|Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang link, SPMS-PAP-03-18A, 637371 Singapore.
authors.forename: Jilei
authors.initials: J
authors.lastname: Liu
authors.affiliation: Institute of Chemical and Engineering Sciences, A*STAR , 1 Pesek Road, Jurong Island, 627833 Singapore.|Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang link, SPMS-PAP-03-18A, 637371 Singapore.
authors.forename: Linfei
authors.initials: L
authors.lastname: Lai
authors.affiliation: College of Material Science & Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University , Shanghai 201620, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Institute of Chemical and Engineering Sciences, A*STAR , 1 Pesek Road, Jurong Island, 627833 Singapore.
authors.forename: Yongda
authors.initials: Y
authors.lastname: Zhen
authors.affiliation: Institute of Chemical and Engineering Sciences, A*STAR , 1 Pesek Road, Jurong Island, 627833 Singapore.
authors.forename: Jianyi
authors.initials: J
authors.lastname: Lin
authors.affiliation: Department of Materials Sciences and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Yanwu
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Materials Sciences and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Hengxing
authors.initials: H
authors.lastname: Ji
authors.affiliation: Institute of Chemical and Engineering Sciences, A*STAR , 1 Pesek Road, Jurong Island, 627833 Singapore.
authors.forename: Li Li
authors.initials: LL
authors.lastname: Zhang
authors.affiliation: Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) Center at the Ulsan National Institute of Science & Technology (UNIST) Campus, Department of Chemistry and School of Materials Science, UNIST , Ulsan 689-798, Republic of Korea.
authors.forename: Rodney S
authors.initials: RS
authors.lastname: Ruoff
keywords: graphite foam; in situ activation; lithium-ion battery; nitrogen-doped graphene; sheet contact