Confined growth of Li4Ti5O12 nanoparticles in nitrogendoped mesoporous graphene fibers for high-performance lithium-ion battery anodes
Confined growth of Li4Ti5O12 nanoparticles in nitrogendoped mesoporous graphene fibers for high-performance lithium-ion battery anodes作者机构：State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering TsinghuaUniversity Beijing 100084 China Department of Chemical and Biomolecular Engineering University of California Los Angeles CA 90095 USA
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2016年第9卷第1期
页 面：230-239页
核心收录：
学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：This work was supported by National Natural Science Foundation of China (Nos. 21306102 and 21422604) and partially supported by Science Foundation of China University of Petroleum Beijing (No. 2462013YJRC028)
主 题：lithium titanate nitrogen-doped porousgraphene fibers lithium-ion batteries
摘 要：Nanomaterials with electrochemical activity are always suffering from aggregations, particularly during the high-temperature synthesis processes, which will lead to decreased energy-storage performance. Here, hierarchically structured lithium titanate/nitrogen-doped porous graphene fiber nanocomposites were synthesized by using confined growth of Li4Ti5O12 （LTO） nanoparticles in nitrogen-doped mesoporous graphene fibers （NPGF）. NPGFs with uniform pore structure are used as templates for hosting LTO precursors, followed by high-temperature treatment at 800 ~C under argon （Ar）. LTO nanoparticles with size of several nanometers are successfully synthesized in the mesopores of NPGFs, forming nanostructured LTO/NPGF composite fibers. As an anode material for lithium-ion batteries, such nanocomposite architecture offers effective electron and ion transport, and robust structure. Such nanocomposites in the electrodes delivered a high reversible capacity （164 mAh.g-1 at 0.3 C）, excellent rate capability （102 mAh-g-1 at 10 C）, and long cycling stability.
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