Structure and reversible lithium intercalation in a new P′3-phase: Na2/3Mn1−yFeyO2 (y = 0, 1/3, 2/3)
YONCHEVA, Meglena
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STOYANOVA, Radostina
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Voir plus >
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
YONCHEVA, Meglena
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STOYANOVA, Radostina
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institute of General and Inorganic Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
NIHTIANOVA, Diana
Institute of General and Inorganic Chemistry
Institute of Mineralogy and Crystallography
< Réduire
Institute of General and Inorganic Chemistry
Institute of Mineralogy and Crystallography
Langue
en
Article de revue
Ce document a été publié dans
Journal of Materials Chemistry. 2012, vol. 22, n° 44, p. 23418-23427
Royal Society of Chemistry
Résumé en anglais
In this contribution, new data on the reversible Li+ intercalation in iron substituted sodium manganates are provided. Novel Na2/3Mn1−yFeyO2 (y = 0, 1/3 and 2/3) compounds with a P′3-type structure are prepared from ...Lire la suite >
In this contribution, new data on the reversible Li+ intercalation in iron substituted sodium manganates are provided. Novel Na2/3Mn1−yFeyO2 (y = 0, 1/3 and 2/3) compounds with a P′3-type structure are prepared from freeze-dried citrate precursors at 500 °C. A new structural element is the development of three-layer oxygen stacking contrary to the well-known P2-type Na2/3MnO2 with a two-layer sequence. The effect of Fe additives on the structure of Na2/3MnO2 was examined by XRD powder diffraction and TEM analysis. The oxidation state and the distribution of transition metal ions in Na2/3Mn1−yFeyO2 were analysed using electron paramagnetic resonance spectroscopy. The lithium intercalation in Na2/3Mn1−yFeyO2 was investigated in two-electrode lithium cells of the type Li|LiPF6 (EC:DMC)|Na2/3Mn1−yFeyO2. The stability of the layered phases during lithium intercalation was studied by ex situ Raman spectroscopy. It was found that the intermediate Na2/3Mn2/3Fe1/3O2 composition is able to intercalate Li+ reversibly in high amounts. Details of the structure and its stability during the Li+ intercalation are discussed.< Réduire
Mots clés en italien
Reversible Li+ intercalation
Iron
Substitution
Sodium manganates
Origine
Importé de halUnités de recherche