Reactive ionic liquids

摘要

The invention relates to reactive ionic liquids containing organic cations with groups or substituents which are susceptible to electrochemical reduction and anions obtained from fluoroalkyl phosphates, fluoroalkyl phosphinates, fluoroalkyl phosphonates, acetates, triflates, imides, methides, borates, phosphates and/or aluminates, for use in electrochemical cells, such as lithium ion batteries and double-layer capacitors.

主权项

1. Ionic liquids of the general formula I
K+A−  (I) in which: K+ denotes at least one cation selected from the group consisting of the general formula IV where X denotes CH2; R5 denotes —(CH2)n—O—C(O)—R— where n=2; and R denotes CH3; and A− denotes at least one anion selected from the group consisting of [FyP(CmF2m+1)6−y]−; (CmF2m+1)2P(O)O−; (CmF2m+1)P(O)O22−; O—C(O)—CmF2m+1; O—S(O)2—CmF2m+1; N(C(O)—CmF2m+1)2; N(S(O)2—CmF2m+1)2; N(C(O)—CmF2m+1)(S(O)2—CmF2m+1); N(C(O)—CmF2m+1)(C(O)F); N(S(O)2—CmF2m+1)(S(O)2F); N(S(O)2F)2; C(C(O)—CmF2m+1)3; C(S(O)2—CmF2m+1)3; where y=1, 2, 3, 4 or 5 and m=1 to 8, where some of the CF2 groups may be replaced by O, S(O)2, NR or CH2, and where denotes a 1,2- or 1,3-diol, a 1,2- or 1,3-dicarboxylic acid or a 1,2- or 1,3-hydroxycarboxylic acid; Y denotes B or Al; R1 to R4 denote halogen, and/or a fluorinated or non-fluorinated alkoxy or carboxyl radical.