title: Porous TiO₂ nanowire microsphere constructed by spray drying and its electrochemical lithium storage properties.
abstract: Porous TiO2 nanowire microspheres with greatly decreasing agglomeration were successfully prepared by spray drying of hydrothermal reaction suspension, followed by calcination at 350°C. The as-obtained nanowire microspheres with TiO2-B structure reach an initial discharge capacity 210 mAh g(-1) with an irreversible capacity 25 mAh g(-1) at a current density of 20 mA g(-1). For the 450°C-calcined one with anatase TiO2 crystal structure, the initial discharge capacity is 245 mAh g(-1) but with a much higher irreversible capacity of 80 mAh g(-1). The hierarchical porous structure in the 350°C-calcined TiO2 nanowire microspheres collapsed at 450°C, annihilating the main benefit of nanostructuring.
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Chunju
authors.initials: C
authors.lastname: Lv
authors.forename: Tian
authors.initials: T
authors.lastname: Hu
authors.forename: Kangying
authors.initials: K
authors.lastname: Shu
authors.forename: Da
authors.initials: D
authors.lastname: Chen
authors.forename: Guanglei
authors.initials: G
authors.lastname: Tian
keywords: agglomeration; lithium-ion battery; microsphere; spray drying