LiMBO sub(3) (M identical with Mn, Fe, Co): Synthesis, crystal structure and lithium deinsertion/insertion properties

The LiMBO sub(3) (M identical with Mn, Fe, Co) compounds were synthesized by a solid state reaction. LiFeBO sub(3) and h-LiMnBO sub(3) crystal structures were determined from single crystal data. LiFeBO sub(3) exhibits the same structure as that of other already described LiMBO sub(3) compounds (M i...

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Bibliographic Details
Published in:Solid state ionics 2001-01, Vol.139 (1-2), p.37-46
Main Authors: Legagneur, V, An, Y, Mosbah, A, Portal, R, Le Gal La Salle, A, Verbaere, A, Guyomard, D, Piffard, Y
Format: Article
Language:English
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Summary:The LiMBO sub(3) (M identical with Mn, Fe, Co) compounds were synthesized by a solid state reaction. LiFeBO sub(3) and h-LiMnBO sub(3) crystal structures were determined from single crystal data. LiFeBO sub(3) exhibits the same structure as that of other already described LiMBO sub(3) compounds (M identical with Mg, Mn, Co, Zn). The structure of h-LiMnBO sub(3) is isotypic with the hexagonal form of LiCdBO sub(3). The electrochemical study shows that a very small amount of lithium (less than 0.04 Li per formula unit) can be deinserted reversibly from the three compounds. According to the thermodynamic study performed in the case of LiFeBO sub(3), the Fe super(3+)/Fe super(2+) redox couple lies between 3.1 and 2.9 V/Li, demonstrating an important inductive effect of the BO sub(3) group.
ISSN:0167-2738