Abstract: A negative electrode active material according to one embodiment of the present disclosure comprises: a composite oxide phase that contains Li, Si, Al and B; and Si particles that are dispersed in the composite oxide phase. Relative to the total number of moles of elements (excluding O) contained in the composite, oxide phase, the content of Li is from 5% by mole to 20% by mole (inclusive), the content of Si is from 50% by mole to 70% by mole (inclusive), the content of Al is from 12% by mole to 25% by mole (inclusive), and the content of B is from 12% by mole to 25% by mole (inclusive).

Abstract: A negative electrode for nonaqueous electrolyte secondary batteries therein a negative electrode mixture layer comprises a lower layer that is formed on the negative electrode core body side and an upper layer that is formed on the front surface side of the negative electrode mixture layer. Graphite particles contain: first graphite particles which have a circularity of less than 0.92; and second graphite particles which have a higher circularity than the first graphite particles. The ratio of the breaking strength of the first graphite particles to the breaking strength of the second graphite particles is 2 to 5. The content ratio of the first graphite particles relative to the graphite particles in the upper layer is 30% by mass or more, and is higher than the content ratio of the first graphite particles relative to the graphite particles in the lower layer.

Abstract: The purpose of the present disclosure is to provide a slurry for a non-aqueous electrolyte secondary cell capable of obtaining an electrode mixture layer showing excellent adhesion with a current collector. The slurry for a non-aqueous electrolyte secondary cell, which is one mode of the present disclosure, contains: an electrode mixture containing an electrode active material, lithium carbonate, and carboxymethylcellulose or a salt thereof; and water. The lithium carbonate content is in the range of 33 to 300 ppm with respect to the total mass of the electrode mixture.

Abstract: The purpose of the present invention is to provide a nonaqueous electrolyte secondary battery which has excellent charge/discharge cycle characteristics. A nonaqueous electrolyte secondary battery negative electrode which is an example of an embodiment of the present invention comprises, as negative electrode active materials, a carbon active material and a Si active material comprising Si particles dispersed in an oxide phase containing at least silicon (Si). The Si active material includes a first Si active material and a second Si active material. The first Si active material has a median size on a volume basis that is greater than that of the second Si active material and has an Si particle content that is higher than that of the second Si active material.

Abstract: A negative electrode active material according to one embodiment of the present disclosure comprises: a composite oxide phase that contains Li, Si, Al and B; and Si particles that are dispersed in the composite oxide phase. Relative to the total number of moles of elements (excluding O) contained in the composite, oxide phase, the content of Li is from 5% by mole to 20% by mole (inclusive), the content of Si is from 50% by mole to 70% by mole (inclusive), the content of Al is from 12% by mole to 25% by mole (inclusive), and the content of B is from 12% by mole to 25% by mole (inclusive).

Abstract: The high-temperature storage characteristics of nonaqueous electrolyte secondary batteries are improved. A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode collector and a negative electrode mixture layer. The negative electrode mixture layer contains silicon-containing particles, graphite particles, and carboxymethyl cellulose ammonium salt, and the amount of NH3 in the negative electrode mixture layer is 350 ?g or less per g of the negative electrode mixture layer. The silicon-containing particles preferably have a conductive carbon material layer with which at least part of the surfaces thereof is covered. The silicon-containing particles preferably include SiOX (0.5?X?1.5) particles.