Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Rie Matsuoka

Takeshi Ogasawara

Youichirou Uka

Kaoru Nagata

Yoshinori Aoki

Manabu Takijiri

Sho Urata

Yuta Kuroda

This positive electrode for nonaqueous electrolyte secondary batteries is provided with a collector and a mixture layer that is formed on the collector. The mixture layer comprises: a lithium transition metal oxide that contains more than 50% by mole of Ni relative to the total number of moles of metal elements other than Li; a carbon material; a polymer compound that is soluble in N-methyl-2-pyrrolidone, while having a ring structure in each repeating unit; and a polyoxyethylene amine compound.

Positive electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

A positive electrode includes a positive electrode current collector and a positive electrode mixture layer disposed on the current collector. The positive electrode mixture layer includes a lithium transition metal composite oxide containing 50 mol % or more Ni relative to the total number of moles of metal element or elements except Li, a conductive carbon material, and an adhesion improver capable of attaching to the lithium transition metal composite oxide and the carbon material. The adhesion improver contains a Lewis acidic group, a Lewis basic group, and an aromatic ring-containing hydrophobic group.

The invention provides nonaqueous electrolyte secondary batteries having excellent output characteristics during large-current charging and discharging. A nonaqueous electrolyte secondary battery according to one aspect of the invention includes a positive electrode including a lithium transition metal oxide, a negative electrode including a negative electrode active material capable of storing and releasing lithium ions, and a nonaqueous electrolyte, the negative electrode active material including a carbon material as a main component, the negative electrode including a tungsten compound and/or a molybdenum compound. The tungsten compound and/or the molybdenum compound is preferably attached to the surface of the carbon material.

Nonaqueous electrolyte secondary batteries

Growing community of inventors

Hyogo, Japan

Rie Matsuoka