Rechargeable battery including a Li.sub.1+x Mn.sub.2 O.sub.4 cathode and a carbon anode
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United States of America Patent
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Mar 23, 1993
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app pub date -
Jan 28, 1991
filing date -
Jan 28, 1991
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Abstract
A lithium metal free non-aqueous secondary battery including a carbon anode and a lithium manganese oxide cathode is described. In operation, lithium from the lithium manganese oxide positive electrode intercalates with the carbon negative electrode and in this manner lithium ions are rocked back and forth during charge-discharge cycling. Lithium manganese oxide of the formula Li.sub.2 Mn.sub.2 O.sub.4 may also be used as the cathode and this material may be prepared by a novel technique which involves reacting LiMn.sub.2 O.sub.4 with lithium iodide at low temperatures (150.degree. C.), or alternatively by refluxing LiMn.sub.2 O.sub.4 in an acetonitrile solution of lithium iodide.
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