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(11) | EP 4 459 077 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | AUTOMATIC SWIMMING POOL CLEANERS AND COMPONENTS THEREOF |
(57) An electrolyte composition for a lithium ion battery. The composition including:
(a) 5-35wt% of lithium salt (b) 2-10wt% of additive; and (c) 55-93wt% solvent; wherein
the lithium salt comprises; (ai) a salt selected from lithium 2-trifluoromethyl-4,5-dicyanoimidazolide,
lithium difluoro(oxalato)borate, lithium bis(oxalato) borate and lithium tetrafluroborate;
(aii) and optionally, a co-salt selected from lithium bis(trifluoromethanesulfonyl)imide
and/or lithium bis(fluorosulfonyl)imide; wherein the molar ratio of the salt to co-salt
is between 100:0 and 5:95; with the proviso that the composition does not comprise
lithium bis(fluorosulfonyl)imide alongside lithium difluoro(oxalato)borate or lithium
tetrafluroborate; and wherein the additive comprises vinylene carbonate and optionally,
fluoroeth
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