Effect of multivalent cation substitution on the capacity fading of lithium manganese spinel cathodes |
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Authors: | G Perentzis E E Horopanitis L Papadimitriou |
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Institution: | (1) Section of Solid State Physics, Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece |
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Abstract: | The introduction of Co, Al, and Ti into LiMn2O4 cathode powders has been studied in this work. The substitution of 25% Mn with either of these metals is expected to improve the cycle ability of the cathode, while the Jahn–Teller effect is suppressed. The solid-state reaction method is used in order to produce the cathode materials, which are prepared at 750 or 800 °C. The materials are characterized by X-ray data and, electrochemically, by galvanostatic cycling at the 4-V range. Their capacity fading behavior is evaluated, and a further investigation into cycling at a higher voltage range is also presented. |
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Keywords: | Solid-state reaction Spinel electrode Manganese substitution Li-ion batteries Capacity fading |
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