Lithium ion electrochemical cell

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method

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429217, 429218, H01M 462, H01M 1040

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active

056609485

ABSTRACT:
Non-aqueous electrochemical cells with improved performance can be fabricated by employing anodes comprising a composition having graphite particles that have a BET method specific surface area of about 6 to about 12 m.sup.2 /g and a crystallite height L.sub.c of about 100 nm to about 120 nm, and wherein at least 90% (wt) of the graphite particles are less than 16 .mu.m in size; a cathode; and a non-aqueous electrolyte containing a solvent and salt that is interposed between the anode and cathode. When employed in an electrochemical cell, the anode can attain a specific electrode capacity of at least 300 mAhr/g. The electrochemical cell has a cycle life of greater than 1500 cycles, and has a first cycle capacity loss of only about 10% to about 15%.

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Technical Documentation for "Graphite SFG 15", Lonza G&T, Ltd., (Sins, Switzerland), Apr. 1993.
Technical Documentation for "Graphite KS 15", Lonza G&T, Ltd., (Sins, Switzerland), Apr. 1993.
Technical Documentation for "Graphite KS 44", Lonza G&T, Ltd., (Sins, Switzerland), Apr. 1993.

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