Manufacturing method of a separator for a lithium secondary...

Details Manufacturing method of a separator for a lithium secondary... Manufacturing method of a separator for a lithium secondary...

H - Electricity

01

M

H01M 2/16 (2006.01) H01M 10/26 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2117730

This invention relates to an organic electrolyte lithium secondary battery wherein lithium works as an active material, and comprises a negative electrode made of metallic lithium or lithium alloy, and relates more particular to a separator of the same battery. A conventional battery uses a separator made of polyethylene and/or poly propylene, however, this invention uses microporous polyolefin membrane as a separator matrix whose pores are filled and closed with ionic conductive gel electrolyte. The separator uses a sheet whose at least one face contacting the negative electrode has a gel electrolyte layer on it. The gel electrolyte is formed by irradiating ultraviolet ray to a mixed solution wherein a mixture of which major components are oligomer and monomer polymerized by ultra violet ray is added to organic electrolyte. By using the separator according to this invention in an organic electrolyte lithium secondary battery, internal short circuits due to dendrited lithium growing on a negative electrode during a charge can be prevented, and a longer cycle life is expected. Further, burning accidents can be reduced. A highly reliable lithium secondary battery can be thus achieved. Note: The expression "dendrited lithium" means that metal lithium deposited on a negative electrode grows in a form of (or in a shape of) dendrite.

Affiliated with

Also associated with

Rating

Manufacturing method of a separator for a lithium secondary... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manufacturing method of a separator for a lithium secondary..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacturing method of a separator for a lithium secondary... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1701787