Manufacturing method of a separator for a lithium secondary batt

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

1994-10-07

1997-01-28

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429192, 429253, H07M 1040

Patent

active

055976590

ABSTRACT:
An organic electrolyte lithium secondary battery wherein lithium is an active material. The battery comprises a negative electrode made of metallic lithium or a lithium alloy and a separator made of a microporous polyolefin separator matrix whose pores are filled with an ionic conductive gel electrolyte. The separator is in the form of a sheet with at least one face contacting the negative electrode having a gel electrolyte layer. The gel electrolyte is formed by ultraviolet irradiation of a solution having a major component being a mixture of an oligomer and a monomer added to an organic electrolyte. Using the separator in an organic electrolyte lithium secondary battery internal short circuiting of the battery due to dendridic lithium growing on a negative electrode during the charging cycle can be prevented and a longer cycle life achieved.

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Kabata, T., Fujii, T., Kimura, O., and Ohsawa, T., "Gel-type Solid Polymer Electrolytes for Rechargeable Film Batteries" Polymers for Advanced Technologies vol. 4, pp. 205-208. 1993 Month N/A.

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