文章基本信息

标题：Detailed investigation of Na2.24FePO4CO3 as a cathode material for Na-ion batteries
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作者：Weifeng Huang ; Jing Zhou ; Biao Li 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep04188
语种：English
出版社：Springer Nature
摘要：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.