ELECTRODE MATERIAL FOR SECONDARY BATTERY, METHOD FOR PRODUCING ELECTRODE MATERIAL FOR SECONDARY BATTERY, AND SECONDARY BATTERY

摘要

To solve the problem of low electrical conductivity and low lithium ion diffusivity derived from the crystal structure of an electrode active material having one-dimensional ion diffusivity, the electrode material for a secondary battery includes crystal primary particles of an electrode active material which releases or absorbs cations of a monovalent or divalent metal when subjected to electrochemical oxidation or reduction and which has a crystal lattice in which the cations can move only in a one-dimensional movable direction during the process of oxidation or reduction, and an ion-conductive substance and conductive carbon which coexist on the surface of the primary particles, wherein the ion-conductive substance has a property which allows two- or three-dimensional movement of the cations, and the cations are movable via a layer in which the ion-conductive substance and the conductive carbon coexist.