title: Detailed investigation of Na2.24FePO4CO3 as a cathode material for Na-ion batteries.
abstract: Na-ion batteries are gaining an increased recognition as the next generation low cost energy storage devices. Here, we present a characterization of Na3FePO4CO3 nanoplates as a novel cathode material for sodium ion batteries. First-principles calculations reveal that there are two paths for Na ion migration along b and c axis. In-situ and ex-situ Fe K-edge X-ray absorption near edge structure (XANES) point out that in Na3FePO4CO3 both Fe(2+)/Fe(3+) and Fe(3+)/Fe(4+) redox couples are electrochemically active, suggesting also the existence of a two-electron intercalation reaction. Ex-situ X-ray powder diffraction data demonstrates that the crystalline structure of Na3FePO4CO3 remains stable during the charging/discharging process within the range 2.0-4.55 V.
authors.affiliation: 1] National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, P. R. China [2] Key lab of theory and technology for advanced batteries materials, College of Engineering, Peking University, Beijing 100871, P. R. China [3] Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Weifeng
authors.initials: W
authors.lastname: Huang
authors.affiliation: Chinese Academy of Sciences, Shanghai Institute Applied Physics, Shanghai 201204, P. R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Key lab of theory and technology for advanced batteries materials, College of Engineering, Peking University, Beijing 100871, P. R. China.
authors.forename: Biao
authors.initials: B
authors.lastname: Li
authors.affiliation: Key lab of theory and technology for advanced batteries materials, College of Engineering, Peking University, Beijing 100871, P. R. China.
authors.forename: Jin
authors.initials: J
authors.lastname: Ma
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, P. R. China.
authors.forename: Shi
authors.initials: S
authors.lastname: Tao
authors.affiliation: Key lab of theory and technology for advanced batteries materials, College of Engineering, Peking University, Beijing 100871, P. R. China.
authors.forename: Dingguo
authors.initials: D
authors.lastname: Xia
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, P. R. China.
authors.forename: Wangsheng
authors.initials: W
authors.lastname: Chu
authors.affiliation: 1] National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, P. R. China [2] Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Ziyu
authors.initials: Z
authors.lastname: Wu