Patent ID: 8323829

Claim:
An electrode used for an electric storage device that includes plural electrodes that are stacked such that an ion-conductive layer is disposed between each pair of the electrodes, comprising: a current collector; an electrode layer having a positive electrode layer portion that contains a positive active material, and a negative electrode layer portion that contains a negative active material, wherein both the positive and negative electrode layer portions are formed on the current collector, wherein a configuration of the electrode layer varies according to a position in the electrode layer such that a current density in a first region of the electrode, where heat radiation performance is lower than the heat radiation performance in a second region of the electrode, is lower than the current density in the second region of the electrode, wherein a particle diameter of the active material in the electrode layer varies according to the position in the electrode layer, wherein the first region of the electrode is a center portion of the electrode, and the second region of the electrode is an end portion of the electrode, and wherein the particle diameter of the active material in a region of the electrode layer, which is positioned in the center portion of the electrode, is larger than the particle diameter of the active material in a region of the electrode layer, which is positioned in the end portion of the electrode.