A cathode composition

A cathode composition for a battery has the general formula: Li1+aMn1-bMg1-cO2; wherein the values of a, b and c are greater than 0. A method of making the cathode composition is also disclosed, wherein a lithium manganese nickel oxide precursor is subjected to high energy ball milling, the precurso...

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Bibliographische Detailangaben
Hauptverfasser:	Niccolo Guerrini, Juliette Marie Billaud ep. Bouville, Matthew Robert Roberts
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS ELECTRICITY INORGANIC CHEMISTRY METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	A cathode composition for a battery has the general formula: Li1+aMn1-bMg1-cO2; wherein the values of a, b and c are greater than 0. A method of making the cathode composition is also disclosed, wherein a lithium manganese nickel oxide precursor is subjected to high energy ball milling, the precursor having oxidation states that are equal to the oxidation states of the respective elements in the final cathode composition. The composition preferably has a single phase rock salt structure, wherein there are no peaks below a 2ϴ value of 35 in the XRD pattern. Preferably, the manganese component in the composition comprises a plurality of oxidation states, in particular a mixture of Mn(III) and Mn(IV). A cathode comprising the cathode composition and an electrochemical cell comprising the cathode are also claimed.