Ionic conducting material containing an oligoether sulphate

Details Ionic conducting material containing an oligoether sulphate Ionic conducting material containing an oligoether sulphate

C - Chemistry, Metallurgy

08

L

C08L 71/02 (2006.01) H01M 10/0565 (2010.01) C08J 5/22 (2006.01) C08K 5/42 (2006.01) C08K 5/435 (2006.01) C09K 9/02 (2006.01) G01N 27/40 (2006.01) G02F 1/15 (2006.01) H01M 4/60 (2006.01) H01M 4/62 (2006.01) H01M 6/18 (2006.01) H01G 9/025 (2006.01)

Patent

CA 2571208

The invention concerns an ionic conducting material containing an oligoether sulphate. The material comprises an ionic compound in solution in a solvating polymer. The ionic compound is a mixture of a lithium bis(trifluoromethanesulphonyl)imidide and of at least one lithium oligoether sulphate selected among lithium oligoether sulphate of formula R-[O-CH2-CH2)]n-O-SO3 -Li+ (I), wherein: R is a CmH2m+1 group with 1 = m =4 and 2 = n =17, and lithium oligoether sulphate of formula Li+ O-SO2-O-CH2 [CH2-O-CH2]p-CH2-O-SO2-O- Li+ (II), wherein 3 =p =45; the overall ratio Ot/Lit is not more than 40, Ot representing the total number of atoms O supplied by the solvating polymer and by the oligoether; the LiTFSI content is such that the Ot/LiTFSI ratio is not less than 20.

L'invention concerne un matériau à conduction ionique contenant un oligoéther sulfate. Le matériau comprend un composé ionique en solution dans un polymère solvatant. Le composé ionique est un mélange d'un bis(trifluorométhanesulfonyl)imidure de lithium et d'au moins un oligoéther sulfate de lithium choisi parmi les oligoéthermonosulfate de lithium répondant ô la formule R-[O-CH2-CH2)]n-O-SO3 -Li+ (I) dans laquelle R est un groupe CmH2m+1 avec 1<=m<=4 et 2<=n<=17, et les oligoétherdisulfate de lithium répondant ô la formule Li+ O-SO2-O-CH2 [CH2-O-CH2]p-CH2-O-SO2-O- Li+ (II) dans laquelle 3<=p<=45 ; le rapport global Ot/Lit est inférieur ou égal à 40, Ot représentant le nombre total d'atomes O fournis par le polymère solvatant et par l'oligoéther ; la teneur en LiTFSI est telle que le rapport Ot/LiTFSI est supérieur ou égal à 20.

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