| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1287513 | Journal of Power Sources | 2013 | 4 Pages |
The electronic structural changes during lithium-ion intercalation/de-intercalation process of nickel substituted lithium manganese spinel oxides have been investigated by using X-ray absorption near-edge structure (XANES) spectra of O K-edges as well as Ni L3-edges and Mn L3-edges. The results of the XANES spectra indicate that the electronic structure of both manganese and oxygen atoms contribute on the redox reaction at 0.06 ≤ x < 1, and only that of nickel atom affect the redox reaction at 1 < x ≤ 1.78 in LixNi0.5Mn1.5O4. Thus, the electronic structural change of oxygen atom is also crucial for considering redox reaction at intercalation/de-intercalation process, and the contribution of the oxygen atom on redox reaction differs in various redox cation species.
► Soft XANES techniques reveal the change of hybridized LUMO in LixNi0.5Mn1.5O4. ► Electronic structure of O is crucial for considering redox reaction of batteries. ► Contribution of the O on redox reaction differs in various cation species.
