title: Crystallinity-controlled titanium oxide-carbon nanocomposites with enhanced lithium storage performance.
abstract: Nanocomposites of crystalline-controlled TiO(2) -carbon are prepared by a novel one-step approach and applied in anodes of lithium ion batteries. In our nanocomposite anodes, the Li(+) capacity contribution from the TiO(2) phase was enormous, above 400 mAh g(-1) (Li(1+x) TiO(2) , x>0.2), and the volumetric capacity was as high as 877 mAh cm(-3) with full voltage utilization to 0 V versus Li/Li(+) , which resulted in higher energy density than that of state-of-the-art titania anodes. For the first time, it was clearly revealed that the capacity at 1.2 and 2.0 V corresponded to Li(+) storage at amorphous and crystalline TiO(2) , respectively. Furthermore, improvements in the rate capability and cycle performance were observed; this was attributed to resistance reduction induced by higher electrical/Li(+) conduction and faster Li(+) diffusion.
authors.affiliation: Green Chemical Technology Division, Korea Research Institute of Chemical Technology (KRICT)&, University of Science and Technology (UST), Daejeon 305-600, Korea.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhou
authors.forename: Jinwoo
authors.initials: J
authors.lastname: Lee
authors.forename: Chul Wee
authors.initials: CW
authors.lastname: Lee
authors.forename: Mihye
authors.initials: M
authors.lastname: Wu
authors.forename: Songhun
authors.initials: S
authors.lastname: Yoon
mesh_terms: D002244:Carbon / Q000737:chemistry*; D004553:Electric Conductivity; D011211:Electric Power Supplies; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: C009495:titanium dioxide; D002244:Carbon; D008094:Lithium; D014025:Titanium