The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2002
Filed:
Oct. 06, 2000
Applicant:
Inventors:
Assignee:
Centre National d'Etudes Spatiales, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
H01M 1/040 ;
U.S. Cl.
CPC ...
H01M 1/040 ;
Abstract
The invention relates to additives to improve the reversibility of a carbon electrode of a lithium ion secondary electrochemical generator. These additives are composed of cyclic or non-cyclic &agr;-halogenated esters such as &agr;-bromo-&ggr;-butyrolactone or methyl chloroformiate. They may be added to the electrolyte at a rate of 0.5 to 3% by volume or adsorbed on the carbon electrode to form a passivation film on said electrode during the first use of the generator.