ELECTROCHEMICAL ELEMENT, METHOD FOR MANUFACTURING SAME, AND ELECTROCHEMICAL DEVICE

An electrochemical element includes a current collector, and an active material layer supported on the current collector, wherein the active material layer contains lithium silicate composite particles each including a. lithium silicate phase, and silicon particles dispersed in the lithium silicate phase, and an electrically conductive carbon material, a first coating covers at least a portion of a surface of the lithium silicate composite particles and at least a portion of a surface of the electrically conductive carbon material, the first coating includes an oxide of a first element other than a non-metal element, and T1>T1is satisfied, where T1is an average thickness of the first coating that covers at least a portion of the surface of the lithium silicate composite particles, and T1is an average thickness of the first coating that covers at least a portion of the surface of the electrically conductive carbon material.