Rapid reversible intercalation of lithium into carbon secondary

Details Rapid reversible intercalation of lithium into carbon secondary Rapid reversible intercalation of lithium into carbon secondary

1992-09-28

1995-06-06

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429197, 429218, H01M 616

Patent

active

054222036

ABSTRACT:
Irreversible loss of lithium during the initial discharge cycle of secondary batteries with carbon intercalation electrodes is substantially reduced by employing as the cell electrolyte a non-aqueous solution of LiPF.sub.6 in a mixture of dimethylcarbonate and ethylene carbonate. By this means, in a secondary battery cell comprising, for example, a Li.sub.1+x Mn.sub.2 O.sub.4 positive electrode and a graphite negative electrode, up to about 90% of the theoretical level of lithium can be reversibly cycled at an exceptionally high rate of about C/1 (complete discharge in one hour).

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