LITHIUM TITANATE PARTICLES AND PROCESS FOR PRODUCING THE LITHIUM TITANATE PARTICLES, MG-CONTAINING LITHIUM TITANATE PARTICLES AND PROCESS FOR PRODUCING THE MG-CONTAINING LITHIUM TITANATE PARTICLES, NEGATIVE ELECTRODE ACTIVE SUBSTANCE PARTICLES FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

Provided are a lithium titanate particulate powder that displays excellent initial discharge capacity and a high discharge capacity maintenance rate as an active substance for a non-aqueous electrolyte secondary battery as well as having reduced gas emissions, a production method for same, and a Mg-containing lithium titanate powder. The present invention includes: a lithium titanate particulate powder with a spinel structure, wherein, when an index is applied by Fd-3m in XRD, the TiO2 volume by Reitveld analysis is 1.5% or less and the Li2TiO3 volume is 1%-6%, the Li4Ti5O12 volume is 94%-99%, and the BET specific surface area is 7-15m2/g; and a Mg-containing lithium titanate particulate powder with a composition indicated by LixMgyTizO4 (wherein x, z0, 0.01?y?0.20, 0.01?y/z?0.10, and 0.5?(x+y)/z?1.0), a BET specific surface area of 5-50m2/g, a single-phase spinel type crystal structure, and a lattice constant (a) with a value indicated by 0.050y+8.3595a?0.080y+8.3595(Å).