title: Copper-Doped Titanium Dioxide Bronze Nanowires with Superior High Rate Capability for Lithium Ion Batteries.
abstract: Pristine and Cu-doped TiO2-B nanowires are synthesized by the microwave assisted hydrothermal method. The doped oxide exhibits a highly porous structure with a specific surface area of 160.7 m(2) g(-1). As evidenced by X-ray photoelectron spectroscopy and X-ray energy dispersive spectroscopy, around 2.0 atom % Cu(2+) cations are introduced into TiO2-B, which leads to not only a slightly expanded lattice network but also, more importantly, a modified electronic structure. The band gap of TiO2-B is reduced from 2.94 to 2.55 eV, resulting in enhanced electronic conductivity. Cyclic voltammetry and electrochemical impedance spectroscopy reveal improved electrochemical kinetic properties of TiO2-B due to the Cu doping. The doped nanowires show a specific capacity of 186.8 mAh g(-1) at the 10 C rate with a capacity retention of 64.3% after 2000 cycles. Remarkably, our material exhibits a specific capacity of 150 mAh g(-1) at the 60 C rate, substantiating its superior high rate capability for rechargeable lithium batteries.
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.|College of Applied Science, Harbin University of Science and Technology , Harbin 150080, P. R. China.
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Meng
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Hailong
authors.initials: H
authors.lastname: Qiu
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yanming
authors.initials: Y
authors.lastname: Ju
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Fei
authors.initials: F
authors.lastname: Du
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, P. R. China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zou
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.|State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, P. R. China.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.affiliation: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yingjin
authors.initials: Y
authors.lastname: Wei
keywords: anode material; copper doping; electrochemical properties; lithium ion batteries; titanium dioxide bronze