Battery, negative electrode for battery, battery pack, electronic apparatus, electric vehicle, electricity storage apparatus and electric power system

摘要

A battery includes a positive electrode, a negative electrode where a negative electrode active material layer containing a negative electrode active material containing natural graphite is formed on at least one surface of a negative electrode collector, and an electrolyte. A thickness of the negative electrode active material layer per one surface of the negative electrode collector is 50 μm or more and 100 μm or less, and in the negative electrode active material layer from the negative electrode collector up to ½ of the thickness of the layer in a surface direction of the negative electrode active material layer, an orientation degree A expressed as (peak intensity of carbon 002 face/peak intensity of carbon 110 face) that is a peak intensity ratio of a carbon 002 face and a carbon 110 face measured by an X-ray diffraction is 100 or more and 500 or less.

主权项

1. A battery comprising:
a positive electrode; a negative electrode in which a negative electrode active material layer containing a negative electrode active material containing natural graphite is formed on at least one surface of a negative electrode collector; and an electrolyte, wherein a thickness of the negative electrode active material layer per one surface of the negative electrode collector is 50 μm or more and 100 μm or less, and in the negative electrode active material layer from the negative electrode collector up to ½ of the thickness of the negative electrode active material layer in a surface direction of the negative electrode active material layer, an orientation degree A expressed as (peak intensity of carbon 002 face / peak intensity of carbon 110 face) that is a peak intensity ratio of a carbon 002 face and a carbon 110 face measured by an X-ray diffraction method is 100 or more and 500 or less; and wherein in the negative electrode active material layer from the negative electrode collector up to ½ of a layer thickness in the surface direction of the negative electrode active material layer, a pore volume ratio expressed as (pore volume B/pore volume A) that is a ratio of a pore volume A (ml/g) in a range of 0.001 μm or more and 0.4 μm or less of a pore diameter measured by a mercury porosimeter and a pore volume B (ml/g) in a range of 0.4 μm or more and 10 μm or less of the pore diameter is 1.4 or more and 3.4 or less.