Materials useful as electrolytic solutes
AssigneesACEP Inc., Centre National De La Recherche Scientifique, Universite de Montreal
InventorsChristophe Michot, Michel Armand, Michel Gauthier, Nathalie Ravet
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Abstract
The invention concerns novel ionic compounds with low melting point whereof the onium type cation having at least a heteroatom such as N, O, S or P bearing the positive charge and whereof the anion includes, wholly or partially, at least an ion imidide such as (FX1O)N−(OX2F) wherein X1 and X2 are identical or different and comprise SO or PF, and their use as solvent in electrochemical devices. Said composition comprises a salt wherein the anionic charge is delocalized, and can be used, inter alia, as electrolyte.
Claims15
An ionic compound having a cation of the onium type with at least one heteroatom comprising N, O, S or P bearing the positive charge and the anion including, in whole or in part, at least one imide ion of the type (FX1O)N−(OX2F) wherein X1 and X2 are the same or different and comprise SO or PF,
- wherein the onium type cation comprises a compound of formula:
- a compound of formula
- a compound of formula
- a compound of formula
- wherein
- W is O, S or N, and wherein N isoptionally substituted with R1 when the valence allows it;
- R1, R3, R4 are the same or different and represent H;
- an alkyl, alkenyl, oxaalkyl, oxaalkenyl, azaalkyl, azaalkenyl, thiaalkyl, thiaalkenyl, dialkylazo, each of these can be either linear, branched or cyclic and comprising from 1 to 18 carbon atoms;
- cyclic or heterocyclic aliphatic radicals of from 4 to 26 carbon atoms optionally comprising at least one lateral chain comprising one or more heteroatoms;
- aryl, arylalkyl, alkylaryl and alkenyaryl of from 5 to 26 carbon atoms optionally comprising one or more heteroatoms in the aromatic nucleus;
- groups comprising aromatic or heterocyclic nuclei, condensed or not, optionally comprising one or more atoms of nitrogen, oxygen, sulfur or phosphorous;
- and wherein two groups R1, R3 or R4 can form a cycle or a heterocycle of from 4 to 9 carbon atoms, and wherein one or more R1, R3 or R4 groups on the same cation can be part of a polymeric chain;
- R2 and R5 to R9 are the same or different and represent R1, R1O—, (R1)2N—, R1S—, R1 being as defined above, and
- wherein R1, R3 and R4 can comprise a polymerisation active group.
An electrochemical generator having at least one positive electrode and at least one negative electrode, wherein the positive electrode comprises a mixed oxide of lithium and vanadium LiV3O8, a double oxide of cobalt and lithium optionally partially substituted of general formula Li1−aCo1−x+yNixAly wherein 0<x+y<1;
- 0<y<0,3 ;
- 0<a<1, a double phosphate of the olivine or Nasicon structure comprising Li1−aFe1−xMnxPO4, Li1−x+2aFe2P1−xSixO4 wherein 0<x, a<1, a rhodizonic acid salt, a polydisulfide obtained after the oxidation of dimercaptoethane, 2,5-dimercapto-1,3,4-thiadiazole, 2,5-dimercapto-1,3,4-oxadiazole, 1,2-dimercaptocyclobutene-3,4-dione, or mixtures thereof, and
- wherein said electrochemical generator uses as the electrolyte an electrolytic composition which comprises a combination of:
- an ionic compound having a cation of the onium type with at least one heteroatom comprising N, O, S or P bearing the positive charge and the anion including, in whole or in part, at least one imide ion of the type (FX1O)N−(OX2F) wherein X1 and X2 are the same or different and comprise SO or PF;
- and
- at least another component comprising a metallic salt, a polar polymer and/or an aprotic co-solvent.
An electrochemical generator having at least one positive electrode and at least one negative electrode, wherein the positive electrode comprises a mixed oxide of lithium and vanadium LiV3O8, a double oxide of cobalt and lithium optionally partially substituted of general formula Li1−aCo1−x+yNixAly wherein 0<x+y<1 ;
- 0<y<0,3 ;
- 0<a<1, a double phosphate of the olivine or Nasicon structure comprising Li1−aFe1−xMnxPO4, Li1−x+2aFe2P1−xSixO4 wherein 0<x, a<1, a rhodizonic acid salt, a polydisulfide derived from the oxidation of dimercaptoethane, 2,5-dimercapto-1,3,4-thiadiazole, 2,5-dimercapto-1,3,4-oxadiazole, 1,2-dimercaptocyclobutene-3,4-dione, or mixtures thereof, and
- wherein said electrochemical generator uses as the electrolyte an electrolytic composition which comprises a combination of:
- an ionic compound having a cation of the onium type with at least one heteroatom comprising N, O, S or P bearing the positive charge and the anion including, in whole or in part, at least one imide ion of the type (FX1O)N−(OX2F) wherein X1 and X2 are the same or different and comprise SO or PF;
- and
- at least another component comprising a metallic salt, a polar polymer and/or an aprotic co-solvent, and
- wherein at least one of the electrodes is mixed with the electrolytic composition to form a composite electrode.
A modulation system of the electrochromic type comprising at least one electrochromic material wherein the electrolyte comprises a combination of:
- an ionic compound having a cation of the onium type with at least one heteroatom comprising N, O, S or P bearing the positive charge and the anion including, in whole or in part, at least one imide ion of the type (FX1O)N−(OX2F) wherein X1 and X2 are the same or different and comprise SO or PF;
- and
- at least another component comprising a metallic salt, a polar polymer and/or an aprotic co-solvent, wherein the electrochromic material is dissolved in the electrolyte.
Dependencies are inferred from the claim text.