Journal
SCIENTIFIC REPORTS
Volume 4, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep04188
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Funding
- National Basic Research Program of the Ministry of Science & Technology of China [2012CB825800]
- Science Fund for Creative Research Groups, NSFC [11321503]
- Knowledge Innovation Program of the Chinese Academy of Sciences [KJCX2-YW-N42]
- Beijing Municipal Natural Science Foundation [2110001]
- National Natural Science Foundation of China (NSFC) [10805055, 11179023, 11275227, U1232131, 11179001]
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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 Fe2+/Fe3+ and Fe3+/Fe4+ 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.
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