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A study of layered lithium manganese oxide cathode materials

2003; Elsevier BV; Volume: 119-121; Linguagem: Inglês

10.1016/s0378-7753(03)00144-7

1873-2755

Tom Eriksson, Marca M. Doeff,

Extraction and Separation Processes

Substituted layered sodium manganese oxide bronzes with the P2 structure were prepared by glycine-nitrate combustion synthesis. The Na in the as-prepared materials could be completely ion-exchanged for Li under mild conditions. All lithium manganese oxide compounds obtained after ion-exchange have O2 stacking of the layers. Cyclic voltammetry and stepped potential experiments on lithium cells containing these materials show that the main redox reaction around 3.1 V is a diffusion-controlled process and is completely reversible. O2-Li0.6[Al0.1Mn0.85□0.05]O2 and O2-Li0.6[Ni0.1Mn0.85□0.05]O2 are particularly promising as cathode materials in lithium cells because of the high reversible discharge capacities (180 mAh/g).