Low temperature li/fes2 battery

H - Electricity – 01 – M

Patent

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Details

H01M 6/16 (2006.01) H01M 4/40 (2006.01) H01M 4/58 (2010.01)

Patent

CA 2577948

The invention is a 1.5 volt primary electrochemical battery cell with an alkali metal lithium negative electrode (such as lithium), a positive electrode (comprising iron disulfide for example) and a nonaqueous electrolyte. The electrolyte has a solute including lithium iodide dissolved in an ether-containing solvent including a 1,2-dimethoxypropane based solvent component and no more than 30 volume percent 1,2-dimethoxyethane. When 1,2~dimethoxypropane is used to replace at least most 1,2-dimethoxyethane in the solvent, the cell provides good discharge capacity at low temperature while maintaining excellent discharge capacity at room temperature.

L'invention concerne un élément de batterie électrochimique primaire de 1,5 Volt comprenant une électrode négative au lithium alcalin (tel que du lithium), une électrode positive (comprenant du disulfure de fer par exemple) et un électrolyte non aqueux. Ledit électrolyte comprend un soluté comportant du iodure de lithium dissous dans un solvant contenant de l'éther, comportant un composant de solvant à base de diméthoxypropane 1,2 et qui ne dépasse pas 30 pour-cent en volume. Lorsque du diméthoxyéthane 1,2 est utilisé pour remplacer au moins le diméthoxyéthane dans le solvant, ledit élément produit une bonne capacité de décharge à faible température, tout en conservant une capacité de décharge excellente à température ambiante.

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