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Browsing by Author "Gummow, RJ"

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  • De Kock, A; Freg, E; Gummow, RJ (Elsevier Science SA, 1998-02)
    The aim of this investigation is to determine optimised spinel cathode compositions that can be used in lithium cells. The cycling stability of 4 V LixMn2O4 electrodes in lithium, flooded electrolyte glass cells has been ...
  • Gummow, RJ; De Kock, A; Thackeray, MM (Elsevier Science B.V, 1994-04)
    The rechargeable capacity of 4 V LixMn2O4 spinel cathodes (0 < x <= 1) has been improved by modifying the composition of the spinel electrode. Stable rechargeable capacities in excess of 100 mAh/g in flooded-electrolyte ...
  • Gummow, RJ; Thackeray, MM (Electrochemical Society Inc, 1994-05)
    Cathode materials that have been synthesized by reduction of lithium-manganese- Cathode materials that have been synthesized by reduction of lithium-manganese-oxide and manganese-oxide precursors with hydrogen at 300 to ...
  • Gummow, RJ; Liles, DC; Thackeray, MM (Pergamon-Elsevier Science Ltd, 1993-12)
    Orthorhombic LiMnO2 products, synthesised by the reaction of gamma-MnO2 and LiOH in argon at 600-620 degrees C using carbon as a reducing agent, have been evaluated as electrode materials in lithium cells. Products that ...
  • Thackeray, MM; Rossouw, MH; Gummow, RJ; Liles, DC; Pearce, K; De Kock, A; David, WIF; Hull, s (Pergamon Press Ltd, 1993-06)
    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 ...
  • Gummow, RJ; Liles, DC; Thackeray, MM; David, WIF (Pergamon-Elsevier Science Ltd, 1993-11)
    The structures of LT-LiCoO2 (synthesised by reaction of Li2CO3 and CoCO3 at 400-degrees-C) and its delithiated product LT-Li0.4CoO2 have been reinvestigated by neutron powder diffraction. Despite an unusually close similarity ...
  • Ferg, E; Gummow, RJ; De Kock, A; Thackeray, MM (Electrochemical Society Inc, 1994-11)
    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 ...
  • Gummow, RJ; Liles, DC; Thackeray, MM (Pergamon-Elsevier Science Ltd, 1993-03)
    Rietveld refinements of X-ray data of LiCoO2 prepared at 400-degrees-C and a chemically-delithiated product Li0.5CoO2 using space group symmetries R3mBAR and Fd3m are reported. Refinements in both R3mBAR (layered-type ...
  • Thackeray, MM; Rossouw, MH; De Kock, A; De la Harpe, AP; Gummow, RJ; Pearce, K; Liles, DC (Elsevier Science SA, 1993-03-15)
    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 ...