Non-aqueous electrolyte secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsNatsumi Goto, Masanori Sugimori, Yasunori Baba, Katsunori Yanagida, Nobuhiro Hirano
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Abstract
In a non-aqueous electrolyte secondary battery according to one exemplary embodiment, a separator includes a substrate, a first filler layer containing phosphate particles and formed on at least one surface of the substrate, and a second filler layer containing inorganic particles and formed on a surface of the first filler layer on the side of the at least one surface of the substrate. The phosphate particles have a BET specific surface area of 5 m2/g or more and 100 m2/g or less.
Claims5
A non-aqueous electrolyte secondary battery comprising:
- a positive electrode, a negative electrode, and a separator, wherein the separator includes:
- a substrate;
- a first filler layer containing phosphate particles and formed on at least one surface of the substrate;
- and
- a second filler layer containing inorganic particles having a higher melting point than the phosphate particles and formed on a surface of the first filler layer on a side of the at least one surface of the substrate, and
- wherein the phosphate particles have a BET specific surface area of 5 m2/g or more and 100 m2/g or less, and
- wherein an average particle size of the phosphate particles is from 0.05 μm to 1 μm, and an average pore size of the substrate is from 0.05 μm to 1 μm, wherein the average particle size of the phosphate particles is smaller than the average pore size of the substrate.
Dependencies are inferred from the claim text.