Composition valence diagram and stoichiometry in the Li-Mn-O spinel system

被引：0
|
作者：
Le Cras, F
Strobel, P
Anne, M
Bloch, D
Soupart, JB
Rousche, JC
机构：
[1] CEA, CEREM, DEM, F-38054 GRENOBLE 09, FRANCE
[2] SEDEMA, B-7333 TERTRE, BELGIUM
来源：
EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY | 1996年 / 33卷 / 01期
关键词：
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The synthesis of Li-Mn-O spinels with manganese valence > 3.5 has been investigated using thermogravimetry and X-ray analysis. The results are discussed as a function of starting reagents and processing temperature. Acetates and gamma-MnO2 were found to react well at low temperature, especially for high Li/Mn ratios. beta-MnO2 could not be totally reacted, but yielded well-crystallized spinels. Shifts in composition due to the presence of secondary phases are discussed with the help of composition-valence diagrams. The variation of the spinel cell parameter along the LixMn3-xO4 (1 less than or equal to x less than or equal to 4/3) solid solution is given by a = 8.4243 - 0.3753 .(Li/Mn). We confirm that the composition of the end member Li4Mn5O12 cannot be reached in single phase form.
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页码：67 / 83
页数：17
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