Ultrasonic Irradiating Effect on Lithium Ion Secondary Battery, Polymer Electrolyte Fuel Cell and Solid Polymer Water Electrolysis

Abstract

As an analogy to ultrasonic-irradiating promotion of plating, it is possible to lessen the activation and concentration polarization in electrochemical process by ultrasonic irradiation. We measured polarizations and current-voltage characteristics, irradiating ultrasonic on polymer electrolyte fuel cell, solid polymer water electrolysis cell, and Lithium ion secondary battery. It was shown experimentally that the ultrasonic effect appeared only in Lithium ion secondary battery, and that its activation polarization decreased by only 4% when the power supplied to an ultrasonic generator was the same order of magnitude as that of secondary battery. This ultrasonic effect decreased when the battery temperature increased.