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Influence of Lithium on Nano-films of Fe2O3

We have investigated thin-films containing nano-sized grains of α-Fe2O3 (hematite) and α-Fe2O3 with addition of Li, by the impedance spectroscopy (IS), thermally stimulated currents (TSC), the Raman spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Combining all of these methods, the dependence of structural and electrical properties upon percentage of Li added into the matrix of these metal-oxide films was found. The comparison of IS, TSC, Raman, SEM and XRD results reveals the increase of grain sizes upon inducing 1% of Li in Fe2O3 matrix followed by the decrease of grain sizes in the case of samples with 10% Li, as well as the decrease (increase) of conductivity, respectively. These changes are explained by the structural changes of the grains (and the grain boundaries) and with the impact of Li+ ions in the charge transfers. This material is suitable for application in the galvanic cell of second generation that could be used as solar-cells backup.

hematite; IS; TSC; Raman spectroscopy; SEM; XRD

Thomson Reuters Master Journal List JOURNAL LIST Search terms: JOURNAL OF NANOMATERIALS Total journals found: 1 1. JOURNAL OF NANOMATERIALS Irregular ISSN: 1687-4110 HINDAWI PUBLISHING CORPORATION, 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, USA, NY, 10022 Science Citation Index Expanded Current Contents - Physical, Chemical & Earth Sciences Current Contents - Engineering, Computing & Technology