title: Microwave-Induced in situ synthesis of Zn2GeO4/N-doped graphene nanocomposites and their lithium-storage properties.
abstract: Zn2GeO4/N-doped graphene nanocomposites have been synthesized through a fast microwave-assisted route on a large scale. The resulting nanohybrids are comprised of Zn2GeO4 nanorods that are well-embedded in N-doped graphene sheets by in situ reducing and doping. Importantly, the N-doped graphene sheets serve as elastic networks to disperse and electrically wire together the Zn2GeO4 nanorods, thereby effectively relieving the volume-expansion/contraction and aggregation of the nanoparticles during charge and discharge processes. We demonstrate that an electrode that is made of the as-formed Zn2GeO4/N-doped graphene nanocomposite exhibits high capacity (1463 mA h g(-1) at a current density of 100 mA g(-1)), good cyclability, and excellent rate capability (531 mA h g(-1) at a current density of 3200 mA g(-1)). Its superior lithium-storage performance could be related to a synergistic effect of the unique nanostructured hybrid, in which the Zn2GeO4 nanorods are well-stabilized by the high electronic conduction and flexibility of N-doped graphene sheets. This work offers an effective strategy for the fabrication of functionalized ternary-oxide-based composites as high-performance electrode materials that involve structural conversion and transformation.
authors.affiliation: State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zou
authors.forename: Xianluo
authors.initials: X
authors.lastname: Hu
authors.forename: Yongming
authors.initials: Y
authors.lastname: Sun
authors.forename: Wei
authors.initials: W
authors.lastname: Luo
authors.forename: Fangfang
authors.initials: F
authors.lastname: Xia
authors.forename: Long
authors.initials: L
authors.lastname: Qie
authors.forename: Yan
authors.initials: Y
authors.lastname: Jiang
authors.forename: Yunhui
authors.initials: Y
authors.lastname: Huang