title: Advanced Mesoporous Spinel Li4Ti5O12/rGO Composites with Increased Surface Lithium Storage Capability for High-Power Lithium-Ion Batteries.
abstract: Spinel Li4Ti5O12 (LTO) and reduced graphene oxide (rGO) are attractive anode materials for lithium-ion batteries (LIBs) because of their unique electrochemical properties. Herein, we report a facile one-step hydrothermal method in preparation of a nanocomposite anode consisting of well-dispersed mesoporous LTO particles onto rGO. An important reaction step involves glucose as a novel linker agent and reducing agent during the synthesis. It was found to prevent the aggregation of LTO particles, and to yield mesoporous structures in nanocomposites. Moreover, GO is reduced to rGO by the hydroxyl groups on glucose during the hydrothermal process. When compared to previously reported LTO/graphene electrodes, the newly prepared LTO/rGO nanocomposite has mesoporous characteristics and provides additional surface lithium storage capability, superior to traditional LTO-based materials for LIBs. These unique properties lead to markedly improved electrochemical performance. In particular, the nanocomposite anode delivers an ultrahigh reversible capacity of 193 mA h g(-1) at 0.5 C and superior rate performance capable of retaining a capacity of 168 mA h g(-1) at 30 C between 1.0 and 2.5 V. Therefore, the newly prepared mesoporous LTO/rGO nanocomposite with increased surface lithium storage capability will provide a new opportunity to develop high-power anode materials for LIBs.
authors.affiliation: Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University , Shenyang 110036, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Ge
authors.affiliation: Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University , Shenyang 110036, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Hao
authors.affiliation: Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260, United States.
authors.forename: Hannah
authors.initials: H
authors.lastname: Osgood
authors.affiliation: Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University , Shenyang 110036, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University , Shenyang 110036, China.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.affiliation: Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University , Shenyang 110036, China.
authors.forename: Luxia
authors.initials: L
authors.lastname: Cui
authors.affiliation: Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University , Shenyang 110036, China.
authors.forename: Xi-Ming
authors.initials: XM
authors.lastname: Song
authors.affiliation: Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260, United States.
authors.forename: Ogechi
authors.initials: O
authors.lastname: Ogoke
authors.affiliation: Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260, United States.
authors.forename: Gang
authors.initials: G
authors.lastname: Wu
keywords: anode; high power; lithium-ion batteries; reduced graphene oxide; spinel Li4Ti5O12