Non-aqueous electrolyte battery, battery pack, and vehicle

摘要

According to one embodiment, a non-aqueous electrolyte battery includes an outer case, a negative electrode, a positive electrode including a current collector and a positive electrode layer formed on surface of the current collector and opposed to the negative electrode layer, and a non-aqueous electrolyte, wherein the positive electrode layer includes a layered lithium nickel cobalt manganese composite oxide and a lithium cobalt composite oxide, the positive electrode layer has a pore volume with a pore diameter of 0.01 to 1.0 μm, the pore volume being 0.06 to 0.25 mL per 1 g of a weight of the positive electrode layer, and a pore surface area within the pore volume range is 2.4 to 8 m2/g.

主权项

1. A non-aqueous electrolyte battery comprising:
an outer case; a negative electrode housed in the outer case and comprising a current collector and a negative electrode layer formed on at least one of surfaces of the current collector; a positive electrode housed in the outer case and comprising a current collector and a porous positive electrode layer formed on at least one of surfaces of the current collector and opposed to the negative electrode layer; and a non-aqueous electrolyte filled in the outer case and comprising a lithium salt, wherein the negative electrode layer comprises an active material having a lithium absorption/desorption potential of 0.4 V vs. Li/Li+ or more, the porous positive electrode layer comprises layered lithium nickel cobalt manganese composite oxide particles as an active material and a binder, the porous positive electrode layer has a pore volume with a pore diameter of 0.01 μm or more and 1.0 μm or less obtained by the mercury press-in method, the pore volume being 0.06 mL or more and 0.25 mL or less per 1 g of a weight of the positive electrode layer, and a pore surface area within the pore volume range is 2.4 m2/g or more and 8 m2/g or less.