Positive electrode and method of producing the same, and non-aqueous electrolyte secondary battery including positive electrode and method of producing the same

A method of producing a positive electrode having an active material layer, the method comprising:

• forming a composite material layer by applying a composite material to a positive electrode current collector, drying, and compression;
• and
• performing heat treatment of the composite material layer at a temperature within the range of a melting point of a binding agent to a pyrolytic temperature thereof, wherein
• the composite material includes an active material including at least a first active material, and the binding agent,
• the first active material is a first secondary particle consisting of first primary particles aggregated together and having a surface thereof covered with a boron compound, and
• the first secondary particle is a lithium-(transition metal) composite oxide having a titanium compound at a grain boundary between the first primary particles and including Ni at 75 mol % or more relative to a total number of moles of metallic element except Li.