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Browsing by Author "De Kock, A"

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Ramsdellite-MnO2 for lithium batteries: The ramsdellite to spinel transformation

Author: Thackeray, MM ; Rossouw, MH ; Gummow, RJ ; Liles, DC ; Pearce, K ; De Kock, A ; David, WIF ; Hull, s Date: Jun 1993 A pure and highly crystalline form of ramsdellite-MnO2 has been synthesized by acid treatment of the spinels LiMn2O4 and Li2Mn4O9 at 95°C. Although the ramsdellite-MnO2 framework remains intact on lithiation at 70°C, the hexagonally-close-packed ... Read more
Similarity score computation for minutiae-based fingerprint recognition

Author: Khanyile, NP ; De Kock, A ; Mathekga, Mmamolatelo E Date: Sep 2014 This paper identifies and analyses the factors that contribute to the similarity between two sets of minutiae points as well as the probability that two sets of minutiae points were extracted from fingerprints of the same finger. Minutiae-based ... Read more
Spinal Anodes for Lithium-Ion Batteries

Author: Ferg, E ; Gummow, RJ ; De Kock, A ; Thackeray, MM Date: Nov 1994 Anodes of Li4Mn5O12, Li4Ti5O12, and Li2Mn4O9 with a spinel-type structure have been evaluated in room-temperature lithium cells. The cathodes that were selected for this study were the stabilized spinels, Li1.03Mn1.97O4 and LiZn0.025Mn1.95O4, ... Read more
Synthesis and structural characterization of defect spinels in the lithium-manganese-oxide system

Author: Thackeray, MM ; De Kock, A ; David, WIF Date: Oct 1993 Lithium-manganese-oxides prepared at moderate temperatures are under investigation as insertion electrodes for rechargeable lithium batteries. The structures of two defect-spinel compounds synthesized by the reaction of MnCO3 and Li2CO3 at ... Read more
Synthesis and structural characterization of defect spinels in the Lithium-Manganese-Oxide system

Author: Thackeray, MM ; De Kock, A ; David, WIF Date: Oct 1993 Lithium-manganese-oxides prepared at moderate temperatures are under investigation as insertion electrodes for rechargeable lithium batteries. The structures of two defect-spinel compounds synthesised by the reaction of MnCO3 and Li2CO3 at ... Read more
Versatility of MnO2 for lithium battery applications

Author: Thackeray, MM ; Rossouw, MH ; De Kock, A ; De la Harpe, AP ; Gummow, RJ ; Pearce, K ; Liles, DC Date: 15 Mar 1993 Manganese dioxide has for many years found widespread use as a cathode material in aqueous Leclanche, zinc chloride and alkaline cells and, more recently, in nonaqueous lithium cells. However, despite the large number of polymorphic structures ... Read more

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Browsing by Author "De Kock, A"

Browsing by Author "De Kock, A"

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