Lithium-ion cell with a wide operating temperature range
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United States of America Patent
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Sep 1, 2009
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app pub date -
Apr 8, 2004
filing date -
Apr 8, 2004
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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. 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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