Gel electrolyte and gel electrolyte battery

Details Gel electrolyte and gel electrolyte battery Gel electrolyte and gel electrolyte battery

H - Electricity

01

M

H01M 6/22 (2006.01) H01M 10/36 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2298809

A gel electrolyte comprised of a non-aqueous electrolytic solution immersed in a matrix polymer, in which. ion conductivity of a solvent is improved and superior cyclic characteristics are achieved. To this end, the gel electrolyte includes an electrolyte, a matrix polymer and a non-aqueous solvent. The non-aqueous solvent is a mixed solvent of ethylene carbonate (EC), propylene carbonate (PC) and .gamma.--butyrolactone (GBL). The non-aqueous solvent is of a weight composition in an area in a triangular phase diagram (EC, PC, GBL) surrounded by a point (70, 30, 0), a point (55, 15, 30), a point (15, 55, 30) and a point (30, 70, 0). A gel electrolyte battery employing this electrolyte is also disclosed.

On peut obtenir un électrolyte en gel composé d'une solution électrolytique non aqueuse immergée dans une matrice polymérique, dans lequel la conductivité ionique du solvant est améliorée, et les caractéristiques cycliques, supérieures. Pour cela, l'électrolyte en gel renferme un électrolyte, une matrice polymérique et un solvant non aqueux. Ce solvant est un mélange de carbonate d'éthylène (CE), de carbonate de propylène (CP) et de gamma-butyrolactone (GBL). La composition massique de ce solvant non aqueux occupe dans un diagramme triangulaire des phases (CE, PE, GBL) une surface délimitée par un point (70, 30, 0), un point (55, 15, 30), un point (15, 55, 30) et un point (30, 70, 0). Une batterie à gel employant cet électrolyte est également présentée.

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