title: An in situ ionic-liquid-assisted synthetic approach to iron fluoride/graphene hybrid nanostructures as superior cathode materials for lithium ion batteries.
abstract: A tactful ionic-liquid (IL)-assisted approach to in situ synthesis of iron fluoride/graphene nanosheet (GNS) hybrid nanostructures is developed. To ensure uniform dispersion and tight anchoring of the iron fluoride on graphene, we employ an IL which serves not only as a green fluoride source for the crystallization of iron fluoride nanoparticles but also as a dispersant of GNSs. Owing to the electron transfer highways created between the nanoparticles and the GNSs, the iron fluoride/GNS hybrid cathodes exhibit a remarkable improvement in both capacity and rate performance (230 mAh g(-1) at 0.1 C and 74 mAh g(-1) at 40 C). The stable adhesion of iron fluoride nanoparticles on GNSs also introduces a significant improvement in long-term cyclic performance (115 mAh g(-1) after 250 cycles even at 10 C). The superior electrochemical performance of these iron fluoride/GNS hybrids as lithium ion battery cathodes is ascribed to the robust structure of the hybrid and the synergies between iron fluoride nanoparticles and graphene.
authors.affiliation: Academy of Fundamental and Interdisciplinary Sciences, Department of Chemistry, Harbin Institute of Technology, Harbin, China.
authors.forename: Bingjiang
authors.initials: B
authors.lastname: Li
authors.forename: David W
authors.initials: DW
authors.lastname: Rooney
authors.forename: Naiqing
authors.initials: N
authors.lastname: Zhang
authors.forename: Kening
authors.initials: K
authors.lastname: Sun