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US 5,683,835 AGranted
Lithiated manganese oxide
AssigneeUltralife Batteries (UK) Limited
InventorPeter George Bruce
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AssigneeUltralife Batteries (UK) Limited
InventorPeter George Bruce
Estimating the term…
Lithium manganese ternary oxide Li Mn.sub.2 0.sub.4+x is produced, where 0.ltoreq..times..ltoreq.0.2, by adding carbon to a manganese-containing solution such as manganese acetate and reacting the solution in an inert atmosphere with a lithium-containing compound such as lithium hydroxide and ammonia. Carbon is added in a proportion up to 8 percent of the weight of the Li Mn.sub.2 0.sub.4+x produced, and preferably the proportion of carbon added is in the range 2 to 6 percent by weight of Li Mn.sub.2 0.sub.4+x. The carbon is preferably carbon powder such as carbon black. Preferably, the Li Mn.sub.2 0.sub.4+x produced as a gelatinous precipitate is dried and heat treated. Alternatively, lithium manganese ternary oxide Li Mn.sub.2 0.sub.4+x is produced by reacting a manganese-containing compound with lithium carbonate. The reaction takes place in water and a precipitate is formed which is dried. The dried precipitate may be heat treated. The manganese-containing compound comprises manganese acetate. Carbon such as carbon powder may be added to the mixture before the reaction occurs.
A method of preparing lithium manganese ternary oxide LiMn.sub.2 O.sub.4+x, where 0.ltoreq..times..ltoreq.0.2, comprising reacting a manganese-containing compound with a lithium-containing compound, wherein carbon is added to one of the manganese-containing and lithium-containing compounds before they react.
A method of preparing lithium manganese ternary oxide LiMn.sub.2 O.sub.4+x, where 0.ltoreq..times..ltoreq.0.2, comprising reacting a manganese-containing solution with a lithium-containing compound in an inert atmosphere, wherein carbon is added to the manganese-containing solution prior to reacting with the lithium-containing compound.
Lithium manganese ternary oxide LiMn.sub.2 O.sub.4+x, where 0.ltoreq..times..ltoreq.0.2, which has been produced by reacting a manganese-containing compound with a lithium-containing compound, wherein carbon black is added to one of the manganese-containing and lithium-containing compounds before they react.
A method of forming an electrode for a battery comprising incorporating therein lithium manganese ternary oxide LiMn.sub.2 O.sub.4+x, where 0.ltoreq..times..ltoreq.0.2, which has been produced by reacting a manganese-containing compound with a lithium-containing compound, wherein carbon black is added to one of the manganese-containing and lithium-containing compounds before they react.
A method of forming an electrode for a battery comprising incorporating therein lithium manganese ternary oxide LiMn.sub.2 O.sub.4+x, where 0.ltoreq..times..ltoreq.0.2, which has been produced by adding carbon black to a manganese-containing solution prior to reaction of the manganese-containing solution with a lithium-containing compound, and thereafter reacting said manganese-containing solution with said lithium-containing compound.
Dependencies are inferred from the claim text.