Saft

Clemence Siret

Philippe Biensan

Frederic Castaing

Lucas Caratero

Cecile Teissier

A lithium-ion battery containing: a positive electrode, a negative electrode, an electrolyte comprising: an organic solvent chosen from the group comprising carbonates, linear esters of a saturated acid, or a mixture thereof, an additive capable of forming a passivation film on the surface of the negative electrode, at least one lithium salt, at least one ionic liquid for which the percentage by weight in the electrolyte is greater than or equal to 20% and less than 50%; a separator for which the apparent contact angle between the surface thereof and the electrolyte is less than 20&#xb0;.

Lithium-ion battery containing an electrolyte comprising an ionic liquid

A subject of the invention is a mixture of solvents for the electrolyte of a lithium battery, which mixture of solvents comprises with respect to the volume of said mixture, The invention is also aimed at a lithium battery comprising a liquid electrolyte having this composition. The battery according to the invention is able to operate at temperatures which can range up to approximately &#x2212;60&#xb0; C. A subject of the invention is also the use of a battery according to the invention at temperatures which can range up to &#x2212;60&#xb0; C.

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Bruges, France

Clemence Siret