Positive electrode material for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery including the same, and method for producing the same

A method for producing a positive electrode material for a nonaqueous electrolyte secondary battery comprising a porous body of a polyanion-containing material and carbon, wherein the method comprises:

• forming said porous body as a secondary particle by aggregation of primary particles of the polyanion-containing material, in which the primary particles are in direct contact with each other;
• and supplying said carbon to the polyanion-containing material in a gaseous source containing at least one of methanol, ethanol, propanol, and butanol in evaporated form, and heating the gaseous source to at least as high as an ignition point of a carbon source in the gaseous source in a manner such that inner walls of pores of said porous body are provided with said carbon in layer state that forms continuous three-dimensional meshes, wherein at least a part of the primary particles is not coated with carbon in a starting condition of the primary particles prior to aggregation into the secondary particle.

A method for producing a positive electrode material for a nonaqueous electrolyte secondary battery comprising a porous body of a polyanion-containing material and carbon, wherein the method comprises the steps of:

• forming said porous body as a secondary particle by aggregation of primary particles of the polyanion-containing material, in which the primary particles are in direct contact with each other;
• placing the secondary particle in a firing furnace;
• and supplying said carbon to the polyanion-containing material in a gaseous source containing at least one of methanol, ethanol, propanol, butanol, and ethylene glycol in evaporated form while heating the firing furnace to a high temperature such that inner walls of pores of said porous body are provided with said carbon in layer state that forms continuous three-dimensional meshes, wherein at least a part of the primary particles is not coated with carbon in a starting condition of the primary particles prior to aggregation into the secondary particle.