Patent ID: 8541136
Filing Date: 2013-09-24
Classification: C01B,H01M,Y02E,Y02T

Abstract:
1. A positive electrode material having an improved charge capacity at high discharge rates, the positive electrode material comprising: an electroactive material having two or more phases comprising lithium (Li), an electroactive metal (M), and phosphate (PO wherein the overall composition of the electroactive material has a ratio of Li:M ranging from greater than 1.1 to about 1.3, a ratio of (PO the ratios Li:M and (PO M is one or more metals selected from the group consisting of Cr, Mn, Fe, Co, and Ni, and wherein the electroactive material comprises an olivine lithium electroactive metal phosphate phase and less than 10 wt % of a lithium-rich secondary phase or a lithium-rich and phosphate-rich secondary phase.