Solvent systems comprising a mixture of lactams and esters...

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

Reexamination Certificate

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C429S332000, C429S326000, C429S331000, C429S339000, C252S062200

Reexamination Certificate

active

07442471

ABSTRACT:
A non-aqueous electrolyte solution for lithium or a lithium ion cell, which improves lithium ion cell capacity retention and enhances storage life thereof. The non-aqueous solution can be implemented in the context of an electrolyte system that includes a lithium salt dissolved in a solvent formed from a mixture of one or more cyclic esters, and/or one or more chain esters, and at least one lactam based solvent. Such a system is suited for use with electrochemical energy storage devices, which are based on non-aqueous electrolytes, such as high energy density batteries and/or high power electrochemical capacitors. Such an electrochemical storage devices is generally based on non-aqueous electrolytes that include lithium salt dissolved in a solvent system.

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