Detailed investigation of Na(2.24)FePO(4)CO(3) as a cathode material for Na-ion batteries

Na-ion batteries are gaining an increased recognition as the next generation low cost energy storage devices. Here, we present a characterization of Na(3)FePO(4)CO(3) nanoplates as a novel cathode material for sodium ion batteries. First-principles calculations reveal that there are two paths for Na...

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Detalles Bibliográficos
Autores principales: Huang, Weifeng, Zhou, Jing, Li, Biao, Ma, Jin, Tao, Shi, Xia, Dingguo, Chu, Wangsheng, Wu, Ziyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3942702/
https://www.ncbi.nlm.nih.gov/pubmed/24595232
http://dx.doi.org/10.1038/srep04188
Descripción
Sumario:Na-ion batteries are gaining an increased recognition as the next generation low cost energy storage devices. Here, we present a characterization of Na(3)FePO(4)CO(3) 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 Na(3)FePO(4)CO(3) 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 Na(3)FePO(4)CO(3) remains stable during the charging/discharging process within the range 2.0–4.55 V.

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