Non-aqueous electrolyte secondary cell

Details Non-aqueous electrolyte secondary cell Non-aqueous electrolyte secondary cell

1997-03-26

1999-01-05

Bell, Bruce F.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

429133, 429249, 429194, 429197, 429192, H01M 214

Patent

active

058560394

ABSTRACT:
A non-aqueous electrolyte secondary cell includes a positive electrode containing lithium-contained complex oxide, a negative electrode containing a material which can absorb and desorb lithium or lithium ion, and a separator which is filled with an organic electrolyte. The separator is composed of a plurality of laminated blend polymer fine porous films each containing polyethylene and polypropylene, and at least one of the laminated blend polymer fine porous films has a different ratio of polyethylene and polypropylene from the other blend polymer fine porous films. In this construction, a blend polymer fine porous film having a higher ratio of polypropylene increases the piercing strength of the separator, and at the same time a blend polymer fine porous film having a higher ratio of polyethylene increases the shut-down characteristic.

REFERENCES:
patent: 5352548 (1994-10-01), Fujimoto et al.
patent: 5643695 (1997-07-01), Barker et al.
patent: 5686138 (1997-11-01), Fujimoto et al.

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