CPC H01M 4/366 (2013.01) [H01M 4/485 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] | 5 Claims |
1. A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein
the positive electrode is provided with a positive electrode active substance layer,
the positive electrode active substance layer contains a lithium composite oxide having a layered structure,
the lithium composite oxide includes a porous particle,
a void ratio of the porous particle is not less than 20% but not more than 50%,
the porous particle contains two or more voids having diameters that are at least 10% of the particle diameter of the porous particle, and
a surface of the porous particle is provided with a coating formed by mixing the porous particle with a coating material that contains tungsten oxide and lithium tungstate, wherein the surface of the porous particle comprises an outer surface of the porous particle and a surface of voids within the porous particle.
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