NONAQUEOUS ELECTROLYTE SECONDARY BATTERY−USE ANODE ACTIVE MATTER, PRODUCTION METHOD THEREFOR, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND PRODUCTION METHOD FOR ANODE

摘要

A nonaqueous electrolyte secondary battery−use active matter capable of effectively improving load characteristics in a nonaqueous electrolyte secondary battery and being increased in capacity, and being high in pack efficiency and large in pack density; and a production method therefor; wherein the anode active matter consists of complex oxide particles containing Li and at least one kind of transition element selected from a group consisting of Co, Ni, Mn and Fe, and the complex oxide particles contain at least 90% of spherical and/or ellipsoidal particles having a ratio D1/D2 that ranges from 1.0 to 2.0 when the longest diameter is D1 and the shortest diameter D2.