| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1332663 | Journal of Solid State Chemistry | 2012 | 6 Pages |
The electrochemical properties of lithium manganese hydroxyphosphate, LiMnPO4(OH), with the tavorite structure have been investigated to assess its suitability as a cathode material for lithium batteries. Stoichiometric LiMnPO4(OH) was synthesized by an ion-exchange reaction with MnPO4·H2O and LiNO3. Lithium (de)intercalation reaction was observed for the first time in the trivalent LiMnPO4(OH), and it exhibited a reversible capacity of 110 mA h g−1 with an average cell voltage of 3.4 V (vs. Li) after an irreversible phase change during the first charge process. The crystal structure has been refined at room temperature by neutron and synchrotron X-ray diffraction data using Rietveld method with a space group of P−1. The hydroxy group at a bottleneck may reduce the attraction force between lithium and the bottleneck oxygen ions that thus increase the ion mobility along the lithium diffusion tunnel.
Graphical abstractTavorite-type material LiMnPO4(OH) shows lithium intercalation at an average voltage of 3.4 V (vs. Li) after a phase transition during the first charge–discharge. Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Tavorite-type LiMnPO4(OH) nanoparticles as a cathode material for lithium battery. ► Synchrotron XRD and neutron diffraction refinement of LiMnPO4(OH). ► Lithium intercalation reaction occurs in LiMnPO4(OH) during charge–discharge. ► A phase transition in the first charge, followed by a reversible reaction.
