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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.

SUBMITTER: Huang W

PROVIDER: S-EPMC3942702 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature

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Detailed investigation of Na2.24FePO4CO3 as a cathode material for Na-ion batteries.

Huang Weifeng W Zhou Jing J Li Biao B Ma Jin J Tao Shi S Xia Dingguo D Chu Wangsheng W Wu Ziyu Z

Scientific reports 20140305

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 electrochem ...[more]

PMID: 24595232

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