Positive electrode for lithium-ion rechargeable battery, lithium-ion rechargeable battery, and method for producing positive electrode for lithium-ion rechargeable battery

A positive electrode for a lithium-ion rechargeable battery, comprising:

• a current collector;
• and
• an electrode active material-containing layer provided on the current collector,
• wherein the electrode active material-containing layer contains active material particles and a conductive material that connects the active material particles to each other;
• wherein the mass ratio of the active material particles:the conductive material:other components in the electrode active material-containing layer is 95 to 99.7:0.3 to 5:0 to 1,
• wherein the conductive material includes a first elongated carbon material having a first length and a second elongated carbon material having a second length larger than the first length,
• wherein the ratio of the second length to the first length is 2 or more and 50 or less
• wherein the first elongated carbon material connects a plurality of primary particles constituting one secondary particle in the active material particles and connects a plurality of primary particles constituting adjacent secondary particles to each other, and
• wherein the second elongated carbon material is disposed to straddle between a plurality of primary particles constituting a plurality of secondary particles in the active material particles and connects the secondary particles to each other,
• wherein the first elongated carbon material is composed of first carbon nanotubes which are multi-walled carbon nanotubes,
• wherein the second elongated carbon material is composed of second carbon nanotubes which are single-walled carbon nanotubes, and
• wherein the mass ratio of the first carbon nanotubes:the second carbon nanotubes is 85 to 99:1 to 15.