Proton insertion and lithium-proton exchange in spinel lithium manganates

The protonic species formed in spinel λ-MnO 2 by proton exchange for lithium ions in Li 1+ x Mn 2− x O 4 precursors have been characterised by infrared and inelastic neutron scattering spectroscopies. Proton diffusion into the lattice appears to depend on the presence of octahedral manganese vacanci...

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Bibliographic Details
Published in:Solid state ionics 1997-05, Vol.97 (1), p.269-276
Main Authors: Ammundsen, Brett, Aitchison, Phillip B, Burns, Gary R, Jones, Deborah J, Rozière, Jacques
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Inorganic compounds
Lithium manganate
Physics
Proton insertion
Salts
Spinel
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Vibrational spectroscopy
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Summary:The protonic species formed in spinel λ-MnO 2 by proton exchange for lithium ions in Li 1+ x Mn 2− x O 4 precursors have been characterised by infrared and inelastic neutron scattering spectroscopies. Proton diffusion into the lattice appears to depend on the presence of octahedral manganese vacancies, with formation of lattice hydroxyl co-existing with water. Mechanisms of proton transfer are considered in relation to lithium-proton exchange during reinsertion of lithium into the materials, and for insertion of additional protons by chemical reduction.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(97)00065-9