Nonaqueous electrolyte secondary battery and separator
First Claim
Patent Images
1. A battery comprising:
- a positive electrode;
a negative electrode; and
a separator disposed between the positive electrode and the negative electrode,wherein the separator comprisesa substrate layer, anda surface layer formed on at least one principal plane of the substrate layer,wherein the surface layer comprises fibrils made of polyvinylidene fluoride having an average diameter of not more than 1.0 μ
m and inorganic particles composing at least 70 wt % of the surface layer.
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Abstract
A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator includes a substrate layer and a surface layer formed on at least one principal plane of the substrate layer, the surface layer contains polyvinylidene fluoride and an inorganic material particle, and an amount of deformation against pressure of the surface layer is larger than that of the substrate layer.
10 Citations
19 Claims
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1. A battery comprising:
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a positive electrode; a negative electrode; and a separator disposed between the positive electrode and the negative electrode, wherein the separator comprises a substrate layer, and a surface layer formed on at least one principal plane of the substrate layer, wherein the surface layer comprises fibrils made of polyvinylidene fluoride having an average diameter of not more than 1.0 μ
m and inorganic particles composing at least 70 wt % of the surface layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 12, 13, 14, 15, 16, 17, 18, 19)
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8. A separator comprising:
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a substrate layer, and a surface layer formed on at least one principal plane of the substrate layer, wherein the surface layer comprises fibrils made of polyvinylidene fluoride having an average diameter of not more than 1.0 μ
m and inorganic particles composing at least 70 wt % of the surface layer. - View Dependent Claims (9, 10, 11)
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Specification