title: Copper-doped dual phase Li4Ti5O12-TiO2 nanosheets as high-rate and long cycle life anodes for high-power lithium-ion batteries.
abstract: Cu-doped Li4 Ti5 O12 -TiO2 nanosheets were synthesized by a facile, cheap, and environmentally friendly solution-based method. These nanostructures were investigated as an anode material for lithium-ion batteries. Cu doping was found to enhance the electron conductivity of the materials, and the amount of Cu doped controlled the crystal structure and content of TiO2 . In addition, the samples, which benefit from multiphases and doping, exhibited much improved capacity, cycle performance, and high rate capability over Cu-free Li4 Ti5 O12 -TiO2 . The discharge capacity of the 0.05 Cu-doped sample was 190 mAh g(-1) at 1C, and even 144 mAh g(-1) was obtained at 30C after 100 cycles. Moreover, after 500 cycles at 30C, the discharge capacity remained at approximately 130 mAh g(-1) . The excellent electrochemical performance of the cell demonstrated that Cu-doping was able to adjust and control the Li4 Ti5 O12 -TiO2 system appropriately.
authors.affiliation: Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (China).
authors.forename: Chengcheng
authors.initials: C
authors.lastname: Chen
authors.forename: Yanan
authors.initials: Y
authors.lastname: Huang
authors.forename: Cuihua
authors.initials: C
authors.lastname: An
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.forename: Yijing
authors.initials: Y
authors.lastname: Wang
authors.forename: Lifang
authors.initials: L
authors.lastname: Jiao
authors.forename: Huatang
authors.initials: H
authors.lastname: Yuan
mesh_terms: D003300:Copper / Q000737:chemistry*; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D003300:Copper; D008094:Lithium; D014025:Titanium
keywords: anodes; copper; electrochemistry; lithium-ion batteries; nanostructures