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AssigneeKerr-McGee Chemical Corporation
InventorsStephen W. Sheargold, Terrell N. Andersen
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A continuous method of preparing a single phase lithiated manganese oxide intercalation compound of the formula Li.sub.1+x Mn.sub.2-x O.sub.4 comprising the steps of: mixing intimately a lithium hydroxide or a lithium salt and a manganese oxide or a manganese salt; feeding the intimately mixed salts to a reactor; continuously agitating the mixed salts in the reactor; heating the agitated mixed salts in the reactor at a temperature of from about 650.degree. C. to about 800.degree. C. for a time not in excess of about 4 hours in an oxygen-containing atmosphere; and cooling the reacted product to less than about 200.degree. C. in an oxygen-containing atmosphere for a time not in excess of about 2 hours.
A continuous method of preparing a single phase lithiated manganese oxide intercalation compound of the formula Li.sub.1+x Mn.sub.2-x O.sub.4 having a spinel-type structure comprising the steps of:
A method of synthesizing a lithium manganese oxide of the formula Li.sub.1+x Mn.sub.2-x O.sub.4 having a spinel-type crystal structure with an a-axis lattice parameter of about 8.235 .ANG. or less, and wherein x is from about 0.0328 to about 0.125 comprising forming an intimate mixture in finely divided solid form of at least one lithium hydroxide or lithium salt reactant selected from the group consisting of LiOH, Li.sub.2 CO.sub.3, LiNO.sub.3 and mixtures thereof and at least one manganese oxide or manganese salt reactant selected from the group consisting of MnO.sub.2, Mn.sub.2 O.sub.3, MnCO.sub.3, Mn.sub.3 O.sub.4, MnO, manganese acetate and mixtures thereof and continuously agitating and heating the mixure in a reactor under a continuous purge of countercurrent air at a temperature in the range of from about 650.degree. C. to about 800.degree. C. for a period not in excess of about 4 hours to cause said reactants to react with each other to form said lithium manganese oxide.
A method of preparing a single phase lithiated manganese oxide intercalation compound of the formula Li.sub.1+x Mn.sub.2-x O.sub.4 having a spinel-type structure by a batch process comprising the steps of
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