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US 6,146,790 AGranted
Non-aqueous electrolyte secondary cell
AssigneeSony Corporation
InventorsAtsuo Omaru, Akira Yamaguchi, Masayuki Nagamine
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Abstract
In a non-aqueous electrolyte secondary cell, it is possible to control the irreversible capacity degradation which is caused when it is preserved under the condition of charging. The non-aqueous electrolyte secondary cell includes a positive electrode that is capable of doping and dedoping lithium and a negative electrode and non-aqueous electrolyte. Specifically, a monomethoxy benzene class compound is added to the non-aqueous electrolyte at a concentration ranging from 0.005 M to 0.5 M.
Claims10
A non-aqueous electrolyte secondary cell comprising:
- a negative electrode that is capable of doping/dedoping lithium,
- a positive electrode and
- a non-aqueous electrolyte dissolved in a non-aqueous solvent, wherein a monomethoxy benzene or a monomethoxy benzene class compound is added to said non-aqueous electrolyte at a concentration ranging from 0.005 M to 0.5 M, said monomethoxy benzene class compound is selected from the group of a compound represented by Chemical Formula 1, 2 and 3:
- ##STR9## Where, X.sup.1 is a halogen element, ##STR10## Where, X.sup.2 and X.sup.3 are halogen elements, ##STR11## Where, X.sup.4, X.sup.5, X.sup.6 and X.sup.7 are halogen elements.
1 more element
Dependencies are inferred from the claim text.