LITHIUM MANGANESE COMPOSITE OXIDE GRANULAR SECONDARY PARTICLE, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

摘要

Lithium manganese composite oxide granular secondary particles are formed by agglomerating crystalline primary particles of a lithium manganese composite oxide. Open pores of micrometer size are present in the granular secondary particles. The average diameter of the open pores is 0.5-3 Microm and the total volume of the open pores is an average of 3-20 volume % based on granular secondary particle total volume. Independent claims are also included for: (1) the manufacture of lithium manganese composite oxide granular secondary particles by dispersing manganese oxide powder and lithium carbonate powder, or manganese oxide powder, lithium carbonate powder and an element M to form a slurry; granulating by spray drying; and firing at 700-900[deg]C; and (2) a non-aqueous electrolyte secondary cell using the lithium manganese composite oxide powder as a positive electrode active material.