LITHIUM COMPOSITE OXIDE PARTICLE FOR LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE MATERIAL AND CONTAINING THE SAME, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY

摘要

An improved positive electrode material for lithium secondary battery that enhances the low temperature load characteristics of battery and further enhances coatability at the fabrication of positive electrode. In the measurement according to the mercury penetration method, the following condition (A) is satisfied and simultaneously at least one of the following conditions (B) and (C) is satisfied. Condition (A) On the mercury penetration curve, the quantity of mercury penetration at a pressure increase from 50 MPa to 150 MPa is 0. 02 cm3/g or less. Condition (B) On the mercury penetration curve, the quantity of mercury penetration at a pressure increase from 50 MPa to 150 MPa is 0.01 cm3/g or more. Condition (C) The average pore radius is in the range of 10 to 100 nm, and further the pore distribution curve has a main peak whose peak top exists at a pore radius ranging from 0.5 to 50 mum and a subpeak whose peak top exists at a pore radius ranging from 80 to 300 nm.