Browsing Faculty of Science by Author "6d283979-96df-48ec-a676-1267ea9ecbd7"
Now showing items 1-10 of 10
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A Combinatorial Investigation of Fe-Si-Zn Thin Film Negative Electrodes for Li-ion 1 Batteries (Preprint)
Obrovac, Mark N. (IOP Publishing, 2014-12-04)Thin-film Fe-Si-Zn libraries were investigated as negative electrode materials for Li-ion batteries using combinatorial and high-throughput techniques. X-ray diffraction and electron microprobe measurements were used to ... -
Hydrothermally Deposited Carbon Coatings for Li-Ion Battery Active Materials Postprint
Obrovac, Mark N.; Wang, Jun; Cao, Yidan (IOPscience, 2023-08-14)Hydrothermally deposited carbon coatings were evaluated for Li-ion battery materials. The applied coatings were found to be highly uniform and porous, with a density of 1.89 g/ml and a surface area of 370 m2/g. In lithium ... -
Investigation of the NaNixMn1-xO2 (0 ≤ x ≤ 1) System for Na-ion Battery Cathode Materials (Preprint)
Obrovac, Mark N.; Fielden, Ryan (IOP Publishing, 2015-01-06)Layered NaNixMn1-xO2 (0 ≤ x ≤ 1) oxides were prepared via solid state reactions. Different reaction conditions were required to obtain phase pure samples, depending on the value of x. The 0 ≤ x ≤ 0.1 compositions were ... -
Lab-scale chemical vapor deposition onto powders
Wang, Jun; Obrovac, Mark N. (AIP Publishing, 2022-07-06)In this paper, a laboratory chemical vapor deposition (CVD) reactor is described, which features an opposing screw rotating fluidized bed. The reactor efficiently concentrates powdered reactants in the reaction zone while ... -
Li-ion Battery Negative Electrodes Based on the FexZn1-x Alloy System (Preprint)
Obrovac, Mark N.; Dunlap, RA; MacEachern, L (Elsevier B.V., 2014-12-10)Thin-film Fe-Zn libraries were investigated as negative electrode materials for Li-ion batteries using combinatorial and high-throughput techniques. X-ray diffraction, Mössbauer effect spectroscopy and electron microprobe ... -
Mixed Transition Metal Titanate and Vanadate Negative Electrode Materials for Na-Ion Batteries (Preprint)
Obrovac, Mark N.; Brown, Z. L.; Smith, S (IOP Publishing, 2014-11-07)Sodium-ion batteries have the potential to be a low cost, sustainable replacement for lithium-ion batteries in large scale energy storage. The lack of practical negative electrode materials limit the development of Na-ion ... -
Mössbauer and Electrochemical Investigations of Carbon-Rich Fe1-xCx Films (Preprint)
Obrovac, Mark N.; Xiuyun, Zhao; R.J., Sanderson; L, MacEachern; Dunlap, R. A. (2015 Elsevier Ltd., 2015-07-10)A thin film binary library of carbon-rich Fe1-xCx (0.47 ≤ x ≤ 0.97) alloys was prepared by combinatorial sputtering of carbon and iron. The sputtered library was characterized by X-ray diffraction and room temperature 57Fe ... -
Quantitative Measurement of Compositional Inhomogeneity in NMC Cathodes by X-ray Diffraction Postprint
Obrovac, Mark N.; Tahmasebi, Mohammad (IOPscience, 2023-08-14)A novel X-ray diffraction (XRD) analysis technique is described for quantitatively measuring compositional inhomogeneity in Li[NixMnyCoz]O2 (NMC) cathode materials and NMC precursors. Single-phase rock salt precursors with ... -
Reversible lithium insertion in catalytically graphitized sugar carbon
Obrovac, Mark N.; Zhao, Xiuyun; Burke, Luke; Dunlap, Richard A (Elsevier, 2015-09-25)Highlights • First report of Li insertion in highly ordered catalytically derived graphite. • Fe catalyst combined with hard carbon precursors enable 1200 °C graphitization. • First report of highly ordered graphite ... -
The Reversible Magnesiation of Pb (Preprint)
Obrovac, Mark N.; Periyapperuma Achchige, Mary Kalani Erangi; Tran, Tuan T.; M.I, Purcell (Elsevier Ltd, 2015-03-04)Sputtered Pb films have been found to reversibly alloy electrochemically with magnesium in Grignard based electrolytes. The voltage curve shows a single plateau at about 125 mV vs. Mg, corresponding to the formation of ...