LiMnTiO4 with the Na0.44MnO2 Structure as a Positive Electrode for Lithium-Ion Batteries
Journal of the Electrochemical Society
The Electrochemical Society
MetadataShow full item record
Amigues, A., Glass, H., & Dutton, S. (2015). LiMnTiO4 with the Na0.44MnO2 Structure as a Positive Electrode for Lithium-Ion Batteries. Journal of the Electrochemical Society, 163 A396-A400. https://doi.org/10.1149/2.0231603jes
A metastable polymorph of LiMnTiO4 with the Na0.44MnO2 structure has been synthesized via ion-exchange from its sodium analogue, NaMnTiO4. The structure was determined from a combination of X-ray and Neutron Powder Diffraction data. LiMnTiO4 has the Pbam space group, with a = 9.074(5), b = 24.97(1) and c = 2.899(2) Å. The shapes and dimensions of the channels are slightly modified as compared to NaMnTiO4 with displaced alkali metal positions and occupancies. LiMnTiO4 was cycled vs Li at room temperature and up to 0.89 lithium ions can be reversibly inserted into the structure, with a discharge capacity of 137 mAh/g after 20 cycles at C/20. At 60°C all the lithium is removed at the end of the first charge at C/20, with subsequent cycles showing reversible insertion of 1.06 Li-ions.
battery, lithium, cathode, manganese, titanium
We thank the Winton Programme for the Physics of Sustainability for funding the project. Thanks are also due to Clare Grey and Giulio Lampronti, for providing technical support and useful discussion. We would finally like to extend our gratitude for the Xpress Access ISIS neutron beamtime on GEM provided by the UK Science and Technology Facilities Council (STFC).
External DOI: https://doi.org/10.1149/2.0231603jes
This record's URL: https://www.repository.cam.ac.uk/handle/1810/254042
Attribution 2.0 UK: England & Wales
Licence URL: http://creativecommons.org/licenses/by/2.0/uk/
Recommended or similar items
The following licence files are associated with this item: