A positive electrode includes: a positive electrode collector; and a positive electrode active material layer provided on the positive electrode collector and containing a positive electrode active material and an alkaline earth metal carbonate having a fixed form.
1. A positive electrode comprising:
a positive electrode collector including aluminum; and
a positive electrode active material layer provided on the positive electrode collector and containing a positive electrode active material and an alkaline earth metal carbonate selected from the group consisting of calcium carbonate, magnesium carbonate and barium carbonate, wherein the alkaline earth metal carbonate has a primary particle size in the longitudinal direction of 0.01 μm or more and not more than 3.0 μm, and wherein a content of the alkaline earth metal carbonate in the positive electrode active material layer is 0.01% by weight or more and less than 0.1% by weight.
2. The positive electrode according to claim 1 , wherein the alkaline earth metal carbonate has at least one shape selected from the group consisting of a cubic shape, a rectangular parallelepipedal shape, a spindle shape, a spherical shape and a flaky shape.
3. A nonaqueous electrolyte battery comprising:
a positive electrode including a positive electrode collector including aluminum, and a positive electrode active material layer provided on the positive electrode collector and containing a positive electrode active material and an alkaline earth metal carbonate selected from the group consisting of calcium carbonate, magnesium carbonate and barium carbonate, wherein the alkaline earth metal carbonate has a primary particle size in the longitudinal direction of 0.01 μm or more and not more than 3.0 μm, and wherein a content of the alkaline earth metal carbonate in the positive electrode active material layer is 0.01% by weight or more and less than 0.1% by weight;
a negative electrode;
a nonaqueous electrolyte; and
a separator.
4. The nonaqueous electrolyte battery according to claim 3 , wherein the alkaline earth metal carbonate has at least one shape selected from the group consisting of a cubic shape, a rectangular parallelepipedal shape, a spindle shape, a spherical shape and a flaky shape.
5. The nonaqueous electrolyte battery according to claim 3 , wherein an open circuit voltage in a completely charged state per pair of the positive electrode and the negative electrode is 4.25 V or more and not more than 6.00 V.
6. The nonaqueous electrolyte battery according to claim 3 , wherein the nonaqueous electrolyte contains 0.01% by weight or more and not more than 30% by weight of a halogen atom-containing cyclic carbonate derivative.
7. The nonaqueous electrolyte battery according to claim 6 , wherein the halogen atom-containing cyclic carbonate derivative is at least one of 4-fluoro-1,3-dioxolan-2-one and 4,5-difluoro-1,3-dioxolan-2-one.