ELECTROCHEMICAL DEVICE USING SOLID POLYMER ELECTROLYTE USING FINE POLYMER COMPOSITE PARTICLES

摘要

Disclosed is an electrochemical device which comprises: a negative electrode that has a negative electrode material layer at least on the surface; a positive electrode that has a positive electrode material layer at least on the surface; and a solid electrolyte that is arranged between the negative electrode and the positive electrode. The electrochemical device is characterized in that: (1) the solid electrolyte is composed of a solid polymer electrolyte that contains, as a main component, fine composite particles each comprising a polymer brush layer that is composed of a polymer graft chain obtained by polymerizing a monomer that has a polymerizable functional group, and the fine composite particles form a substantially three-dimensional regular array structure and a continuous ion-conductive network channel is formed between the fine particles; (2) the negative electrode or the negative electrode material layer and/or the positive electrode or the positive electrode material layer has gaps that are filled with the fine composite particles; and (3) the contact interface between the solid electrolyte and the electrode material layer or the electrode is the polymer brush layer that is composed of a polymer graft chain (in this connection, the electrode material layer is at least one layer selected from the group consisting of the negative electrode material layer and the positive electrode active material layer, and the electrode is at least one electrode selected from the group consisting of the negative electrode and the positive electrode).