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Browsing by Author "Rossouw, MH"

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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
Synthesis of lithium-manganese-oxide spinels: A study by thermal analysis

Author: Thackeray, MM ; Rossouw, MH Date: Dec 1994 The synthesis of lithium-manganese-oxide spinels by reaction of Li2CO3 and MnCO3 in air and under nitrogen to T(max) = 600°C has been investigated by thermogravimetric analysis and differential scanning calorimetry. When the reaction is ... 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 "Rossouw, MH"

Browsing by Author "Rossouw, MH"

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