title: A new oxyfluorinated titanium phosphate anode for a high-energy lithium-ion battery.
abstract: Na3[Ti2P2O10F] was synthesized by a hydrothermal method. It has an open framework structure consisting of TiFO5 octahedra and PO4 tetrahedra. The feasibility of Na3[Ti2P2O10F] as an anode material for lithium-ion batteries was first studied. Na3[Ti2P2O10F] exhibits a reversible capacity of more than 200 mAh g(-1) at a discharge/charge current rate of 20 mA g(-1) (∼0.1 C) and 105 mA g(-1) at a discharge/charge current rate of 400 mA g(-1) (∼2 C) with a lower intercalation voltage. The result of in situ X-ray diffraction test shows the structural evolution during the first discharge/charge cycle. The structure of Na3[Ti2P2O10F] was kept during discharge/charge with a slight change of the lattice parameters, which indicates a lithium solid solution behavior.
authors.affiliation: Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Ma
authors.forename: Chunwen
authors.initials: C
authors.lastname: Sun
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Lyu
authors.forename: Yuesheng
authors.initials: Y
authors.lastname: Wang
authors.forename: Youngsik
authors.initials: Y
authors.lastname: Kim
authors.forename: Liquan
authors.initials: L
authors.lastname: Chen
keywords: Na3[Ti2P2O10F]; anode material; lithium-ion battery; structural evolution