CPC H01M 50/446 (2021.01) [H01M 50/449 (2021.01)] | 14 Claims |
1. A secondary battery comprising:
a positive electrode containing a positive electrode active material;
a negative electrode containing a negative electrode active material;
a separator disposed at least between the positive electrode and the negative electrode; and
an aqueous electrolyte, wherein
the separator comprises an inorganic particle layer including an inorganic particle, a polymeric binder and a fiber substance,
the fiber substance is hydrophilic and a mass ratio of the fiber substance with respect to a total mass of the inorganic particle, the polymeric binder and the fiber substance is 0.1 mass % or more and 40 mass % or less, and
a mass ratio of the polymeric binder with respect to a total mass of the inorganic particle, the polymeric binder and the fiber substance is 5 mass % or more and 30 mass % or less.
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