Lithium-ion cell with a wide operating temperature range

Details Lithium-ion cell with a wide operating temperature range Lithium-ion cell with a wide operating temperature range

2005-06-10

2010-11-02

Maples, John S (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S231100, C429S231300, C429S303000

Reexamination Certificate

active

07824800

ABSTRACT:
A lithium-ion rechargeable cell is described which contains an electrolyte comprising a pyrazolium cation, an imidazolium cation, or a combination thereof, as well as lithium ion, and at least one non-Lewis acid derived counter-ion and which has a ratio of cathode capacity to anode capacity of 1 or less, 1 or greater, and preferably about 1.3 or greater. Electrochemical cells containing an anode, a cathode, and the ionic liquid electrolytes preferably have effective charge/discharge capacity and charging efficiency at low temperatures and at high temperatures.

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