期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 114, 期 21, 页码 10034-10044出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp100751b
关键词
-
资金
- Region Aquitaine [2.3.1-08012000]
- Ministere Tunisien de l'enseignement superieur et de la recherche
- Dupont de Nemours
For the first time, a powder of Na3Fe3(PO4)(4) was obtained by solid state reaction. It crystallizes in monoclinic space group C2/c in good agreement with previous studies of a single crystal. The Rietveld refinement of the XRD pattern showed line broadening of some diffraction lines associated with size and strain effects, Its layered structure can be described by complex layers of corner-sharing FeO6 octahedra connected by PO4 tetrahedra through corner and edge sharing. The Na+ ions are located in the interslab space. The local environments of Fe, Na, and P were characterized by Fe-57 Mossbauer spectroscopy and Na-23 and P-31 MAS NMR. A Second ORder Graphic Extrapolation (SORGE) diagram as introduced by Massiot et al. allowed us to fully interpret the Na-23 MAS NMR spectrum that exhibits three signals for two crystallographic Na sites. The electrochemical properties of Na3Fe3(PO4)(4) were tested in sodium cells. Ex situ and in situ X-ray diffraction data and Mossbauer spectroscopy measurements indicate that the intercalation-deintercalation process of Na+ ions in Na3Fe3(PO4)(4) is reversible and that the structural framework is maintained during cycling. Some degree of disorder is, however, observed for a large intercalated Na+ amount.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据