| 摘要 |
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°. |
| 主权项 |
1. A battery containing:
a positive electrode, a negative electrode, a non-flammable electrolyte comprising: an organic solvent chosen from a group consisting of carbonates, linear esters of a saturated acid, and a mixture thereof, an additive capable of forming a passivation film on the surface of the negative electrode, at least one lithium salt selected from the group consisting of lithium hexafluorophosphate LiPF6, lithium tris(pentafluoroethyl)trifluorophosphate LiFAP, lithium bis oxalatoborate LiBOB, lithium perchlorate LiClO4, lithium hexafluoroarsenate LiAsF6, lithium tetrafluoroborate LiBF4, lithium trifluoromethanesulphonate LiCF3SO3, lithium trifluoromethane sulfonimide LiN(CF3SO2)2 (LiTFSI), and lithium trifluoromethanesulphonemethide LiC(CF3SO2)3 (LiTFSM), and at least one ionic liquid, wherein a weight percentage ratio of the ionic liquid relative to the organic solvent is from 30:70 to less than 50:50; said ionic liquid being selected from the group consisting of
i) 1-butyl 1-methyl pyrrolidinium bis(trifluoromethylsulphonyl)imide (BMP-TFSI),ii) 1-butyl 1-methyl pyrrolidinium tris(pentafluoroethyl)trifluorophosphate (BMP-FAP), andiii) 1-butyl 1-methyl pyrrolidinium bis(fluorosulphonyl)imide (BMP-FSI) and a separator, having an apparent contact angle between its surface and the electrolyte that is less than 20°. |
