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Partially substituted lithium manganese oxides as 3 V cathode materials for secondary lithium batteries

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Abstract

Low temperature synthesis and electrochemical properties of partially substituted lithium manganese oxides are reported. We demonstrate various metallic cations (Cu2+, Ni2+, Fe3+, Co3+) can be incorporated in the 3 V layered cathodic material Li0.45MnO2.1. New compounds Li0.45Mn0.88Fe0.12O2.1, Li0.45Mn0.84Ni0.16O2.05, Li0.45Mn0.79Cu0.21O2.3, Li0.45Mn0.85Co0.15O2.3 are prepared. These 3 V cathode materials are characterized by the same shape of discharge-charge profiles but different values of the specific capacity, between 90 mAh g−1 and 180 mAh g−1. The best results in terms of capacity and cycle life are obtained with the selected content of 0.15 Co per mole of oxide, as the optimum composition. The high kinetics of Li+ transport in Li0.45Mn0.85Co0.15O2.3 compared to that in the Co-free material is consistent with a substitution of Mn(III) by Co(III) in MnO2 sheets.

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Correspondence to S. Bach.

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Franger, S., Bach, S., Pereira-Ramos, J.P. et al. Partially substituted lithium manganese oxides as 3 V cathode materials for secondary lithium batteries. J Solid State Electrochem 10, 389–396 (2006). https://doi.org/10.1007/s10008-005-0004-z

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  • DOI: https://doi.org/10.1007/s10008-005-0004-z

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