ELECTROCHEMICAL DEVICE

摘要

To prevent deterioration of a battery or reduce the degree of deterioration of a battery and to maximize charge and discharge performance of the battery and maintain charge and discharge performance of the battery for a long time. A reaction product formed on an electrode surface causes various malfunctions and deterioration of a battery typified by a lithium-ion secondary battery. The present inventors have found a breakthrough technological idea that a reaction product is prevented from being deposited on an electrode in charging or discharging or a formed reaction product is dissolved by application of an electrical stimulus to an electrochemical device that operates utilizing an electrochemical reaction, typified by a lithium-ion secondary battery. Specifically, the reaction product is dissolved by supplying a signal (inversion pulse current) with which a current flows in the reverse direction of a current with which a reaction product is formed.

主权项

1. An electrochemical device comprising:
a first electrode that includes a first layer including a first active material; a second electrode that includes a second layer including a second active material; and an electrolytic solution between the first electrode and the second electrode, wherein a reaction product is not substantially deposited on a surface of the first electrode or the second electrode.