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 having lithium metal phosphate and thereby attain excellent electrode characteristics and inhibit the deterioration of coating properties and the degradation of a coating layer. An electrode material has a layer comprising Li ion conductive substance including Li, at least any one of Fe and Mn, P and O, and conductive carbon C on the surface of primary particles of an electrode active material represented by the general formula LiMPO 4 (wherein, M=[Fe t Mn 1-t ], and t is a number between 0 inclusive and 1 inclusive); minute secondary particles formed from a plurality of the primary particles that aggregate, and bind to each other via the layer comprising Li ion conductive substance and conductive carbon C; and an area-equivalent diameter of 45 nm or more determined by a specific surface area obtained from the nitrogen adsorption Brunauer, Emmett and Teller (BET) multipoint method.