Electric storage device and fabricating method therefor
View Patent ↗An electrode laminate unit of an electric storage device is composed of positive electrodes and negative electrodes, which are alternately laminated, and a lithium electrode arranged at the outermost part of the electrode laminate unit so as to oppose the negative electrode. A charging/discharging unit having first and second energization control units connected to a positive-electrode terminal, negative-electrode terminal, and a lithium-electrode terminal. Electrons are moved from the lithium electrode to the positive electrode through the first energization control unit, and lithium ions are doped into the positive electrode from the lithium electrode. Electrons are moved from the lithium electrode to the negative electrode through the second energization control unit, and lithium ions are doped into the negative electrode from the lithium electrode. The lithium ions are doped into both of the positive and negative electrodes, whereby the doping time can be dramatically shortened.
1. A fabricating method of an electric storage device in which lithium ions are doped into at least one of a positive electrode and a negative electrode from a lithium electrode as an lithium ion source, the method comprising:
a doping process in which the positive electrode and the lithium ion source are connected to each other and the negative electrode and the lithium ion source are connected to each other so as to dope lithium ions into both of the positive electrode and the negative electrode from the lithium ion source within a range of charge/discharge depth where the doping speed of the lithium ions remains at a constant or smooth rate for the duration of the doping process.
2. The fabricating method according to claim 1 , wherein an energizing state between the positive electrode and the lithium ion source is controlled in the doping process by an energization control unit for the positive electrode.
3. The fabricating method according to claim 1 , wherein an energizing state between the negative electrode and the lithium ion source is controlled in the doping process by an energization control unit for the negative electrode.