Separator for non-aqueous secondary battery and non-aqueous secondary battery
AssigneeTeijin Limited
InventorsMegumi Sato, Satoshi Nishikawa
Life of this patent
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Abstract
Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate, and a heat resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a heat resistant resin and barium sulfate particles, in which an average primary particle size of the barium sulfate particles contained in the heat resistant porous layer is from 0.01 μm to less than 0.30 μm, and in which a volume ratio of the barium sulfate particles in a solid content portion of the heat resistant porous layer is from 5% by volume to less than 30% by volume.
Claims10
A separator for a non-aqueous secondary battery, the separator comprising:
- a porous substrate;
- and
- a heat resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a heat resistant resin and barium sulfate particles,
- wherein an average primary particle size of the barium sulfate particles contained in the heat resistant porous layer is from 0.01 μm to less than 0.30 μm, and
- wherein a volume ratio of the barium sulfate particles in a solid content portion of the heat resistant porous layer is from 5% by volume to 29% by volume, and
- wherein a volume ratio of the heat resistant resin in a solid content portion of the heat resistant porous layer is from 71% by volume to 95% by volume.
Dependencies are inferred from the claim text.