ELECTRODE MATERIAL AND PROCESS FOR MANUFACTURING ELECTRODE MATERIAL

摘要

The purpose of the present invention is to improve both electron conductivity and lithium ion conductivity in an electrode using a lithium metal phosphate and thereby attain excellent electrode characteristics and inhibit the deterioration of coating properties and the degradation of a coated layer. This electrode material is characterized by comprising dense secondary particles, in each of which multiple primary particles that consist of an electrode-active material represented by a general formula LiMPO4 (wherein M=[FetMn1-t], and t is a number of 0 to 1) and that are each provided with a layer on the surface aggregate and are bounded to each another with the layer lying thereamong. The layer contains both a Li ion conductive substance and a conductive carbon (C), while the Li ion conductive substance contains: Li; Fe and/or Mn; P; and O. The electrode material is further characterized by exhibiting an equivalent area diameter of 45nm or more as determined on the basis of the specific surface area determined by nitrogen adsorption according to the multipoint Brunauer-Emmett-Teller (BET) method.