Rechargeable lithium ion battery for wide temperature range and high temperatures

A rechargeable lithium-ion battery comprising:

• a housing;
• and
• at least one battery cell which is arranged within the housing, the at least one battery cell comprising:
• a liquid electrolyte which comprises an ionic liquid, at least one organic compound, and a lithium salt,
• a composite anode which comprises a metal current collector which is coated with a layer which comprises at least one active material and at least one binder,
• a composite cathode which comprises a metal current collector which is coated with a layer which comprises at least one active material and at least one binder, and
• a separator which is arranged between the composite anode and the composite cathode,
• wherein,
• the at least one active material of the composite anode is a lithium titan oxide (LTO),
• the composite cathode, the composite anode, and the separator, when immersed in the liquid electrolyte, are heat resistant at temperatures of above 150° C.,
• the rechargeable lithium-ion battery is rechargeable in a temperature range of from −30° C. to 150° C.,
• the at least one organic compound is selected from the group consisting of a low molecular weight polymer, an organic carbonate, a gamma-butyrolactone, a gamma-valerolactone, or a delta-valerolactone, and
• the low molecular weight polymer comprises:
• an alkylene oxide chain, or
• a low molecular weight polyethylene glycol dimethyl ether.

A rechargeable lithium-ion battery comprising:

• a housing;
• and
• at least one battery cell which is arranged within the housing, the at least one battery cell comprising:
• a liquid electrolyte which comprises an ionic liquid, at least one organic compound, and a lithium salt,
• a composite anode which comprises a metal current collector which is coated with a layer which comprises at least one active material and at least one binder,
• a composite cathode which comprises a metal current collector which is coated with a layer which comprises at least one active material and at least one binder, and
• a separator which is arranged between the composite anode and the composite cathode,
• wherein,
• the at least one active material of the composite anode is a lithium titan oxide (LTO),
• the composite cathode, the composite anode, and the separator, when immersed in the liquid electrolyte, are heat resistant at temperatures of above 150° C.,
• the rechargeable lithium-ion battery is rechargeable in a temperature range of from −30° C. to 150° C.
• the ionic liquid comprises an organic cation and an organic anion, and
• the organic cation is selected,
• from the group consisting of an imidazolium, piperidinium, pyridinium, pyrrolidinium, and ammonium, or
• from the group consisting of bis(trifluoromethanesulfonyl)imide (TFSI), bis(fluorosulfonyl)imide (FSI), trifluoromethylsulfonate (Tf), 4,5-dicyano-2-(trifluoromethyl)imidazol-1-ide, bis(pentafluoroethanesulfonyl)imide, tetrafluoroborate, and tris(pentafluoroethyl)trifluorophosphate.