A new oxyfluorinated titanium phosphate anode for a high-energy lithium-ion battery

Zhaohui Ma; Chunwen Sun; Yingchun Lyu; Yuesheng Wang; Youngsik Kim; Liquan Chen

doi:10.1021/am507272x

A new oxyfluorinated titanium phosphate anode for a high-energy lithium-ion battery

ACS Appl Mater Interfaces. 2015 Jan 21;7(2):1270-4. doi: 10.1021/am507272x. Epub 2015 Jan 9.

Authors

Zhaohui Ma¹, Chunwen Sun, Yingchun Lyu, Yuesheng Wang, Youngsik Kim, Liquan Chen

Affiliation

¹ 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.

PMID: 25541903
DOI: 10.1021/am507272x

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.

Keywords: Na3[Ti2P2O10F]; anode material; lithium-ion battery; structural evolution.

Publication types

Research Support, Non-U.S. Gov't