title: Self-assembled TiO2-graphene hybrid nanostructures for enhanced Li-ion insertion.
abstract: We used anionic sulfate surfactants to assist the stabilization of graphene in aqueous solutions and facilitate the self-assembly of in situ grown nanocrystalline TiO2, rutile and anatase, with graphene. These nanostructured TiO2-graphene hybrid materials were used for investigation of Li-ion insertion properties. The hybrid materials showed significantly enhanced Li-ion insertion/extraction in TiO2. The specific capacity was more than doubled at high charge rates, as compared with the pure TiO2 phase. The improved capacity at high charge-discharge rate may be attributed to increased electrode conductivity in the presence of a percolated graphene network embedded into the metal oxide electrodes.
authors.affiliation: Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
authors.forename: Donghai
authors.initials: D
authors.lastname: Wang
authors.forename: Daiwon
authors.initials: D
authors.lastname: Choi
authors.forename: Juan
authors.initials: J
authors.lastname: Li
authors.forename: Zhenguo
authors.initials: Z
authors.lastname: Yang
authors.forename: Zimin
authors.initials: Z
authors.lastname: Nie
authors.forename: Rong
authors.initials: R
authors.lastname: Kou
authors.forename: Dehong
authors.initials: D
authors.lastname: Hu
authors.forename: Chongmin
authors.initials: C
authors.lastname: Wang
authors.forename: Laxmikant V
authors.initials: LV
authors.lastname: Saraf
authors.forename: Jiguang
authors.initials: J
authors.lastname: Zhang
authors.forename: Ilhan A
authors.initials: IA
authors.lastname: Aksay
authors.forename: Jun
authors.initials: J
authors.lastname: Liu