Electrolyte for secondary battery and secondary battery

H - Electricity – 01 – M

Patent

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Details

H01M 10/056 (2010.01) C08L 71/02 (2006.01) C08G 65/333 (2006.01) C08G 65/337 (2006.01)

Patent

CA 2392543

An electrolyte for secondary batteries which has high ionic conductivity and is highly safe; and a secondary battery which contains the electrolyte and is excellent in suitability for charge/discharge cycles. The electrolyte comprises an ionic compound and one or more organic high-molecular compounds, wherein the high-molecular compounds comprise a compound represented by the formula (1): Z1-[(A1O)1-R1]a or a borate compound obtained by esterifying a compound represented by the formula (1) with boric acid or boric anhydride.(Z1 is a residue of a compound having 1 to 6 hydroxyl groups; A1O's are one or more kinds of C2-4 oxyalkylene groups; R1 is a group or atom selected among cyanoethyl, C1-12 hydrocarbon groups, and hydrogen; and l is 0 to 600 and a is 1 to 6, provided that l.a is 0 to 600).

L'invention concerne un électrolyte pour batteries auxiliaires présentant une conductivité ionique et une fiabilité élevées, ainsi qu'une batterie auxiliaire contenant cet électrolyte particulièrement bien adaptée aux cycles de charge/décharge. Cet électrolyte contient un composé ionique et un ou plusieurs composés organiques à poids moléculaire élevé, lesdits composés comprenant un composé représenté par la formule (1) Z?1¿-[(A?1¿O)¿1?-R?1¿]¿a? ou un composé de borate obtenu par estérification d'un composé représenté par la formule (1) avec de l'acide borique ou de l'anhydride borique. Dans cette formule, Z?1¿ est un résidu d'un composé comprenant entre 1 et 6 groupes hydroxy, les groupes A?1¿O se présentent sous la forme d'un ou de plusieurs types de groupes oxyalkylène C¿2?-C¿4?, R?1¿ est un groupe ou un atome choisi parmi cyanoéthyle, des groupes hydrocarbonés C¿1?-C¿12? et hydrogène, l vaut entre 0 et 600 et a vaut entre 1 et 6, pourvu que l . a vaille entre 0 et 600.

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