In-situ X-ray diffraction study of the phase evolution in undoped and Cr-doped LixMn1.5Ni0.5O4 (0.1 ≤ x ≤ 1.0) 5-V cathode materials
In: Journal of power sources, Jg. 242 (2013), S. 236-243
academicJournal
- print, 29 ref
Zugriff:
The structural changes of the Cr-doped and undoped LiMn1.5Ni0.5O4 crystallized in the initial disordered phase with space group of Fd3m have been investigated during the galvanostatic charge/discharge process at C/24 rate by using in-situ X-ray diffraction (XRD) measurements. The de-intercalation of lithium proceeds through a series of first-order phase transitions with two regions of two-phase coexistence. The phase diagram is analyzed and discussed, together with the differences among different results reported in the literature to distinguish between general intrinsic properties of spinel and sample-dependent properties due to deviation from stoichiometry, strain field effects, degree of cation ordering, and out-of-equilibrium effects. We argue that the Cr-doping stabilizes the lattice without impacting the capacity significantly, but decreases the energy density.
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In-situ X-ray diffraction study of the phase evolution in undoped and Cr-doped LixMn1.5Ni0.5O4 (0.1 ≤ x ≤ 1.0) 5-V cathode materials
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Autor/in / Beteiligte Person: | ZHU, W ; LIU, D ; TROTTIER, J ; GAGNON, C ; MAUGER, A ; JULIEN, C. M ; ZAGHIB, K |
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Zeitschrift: | Journal of power sources, Jg. 242 (2013), S. 236-243 |
Veröffentlichung: | Amsterdam: Elsevier, 2013 |
Medientyp: | academicJournal |
Umfang: | print, 29 ref |
ISSN: | 0378-7753 (print) |
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