Electric storage device and fabricating method therefor

Abstract

An electrode laminate unit 12 of an electric storage device 10 is composed of positive electrodes 14 and negative electrodes 15, which are alternately laminated, and a lithium electrode 16 is arranged at the outermost part of the electrode laminate unit 12 so as to oppose to the negative electrode 15. A charging/discharging unit 21 having first and second energization control units 21 a and 21 b is connected to a positive-electrode terminal 18, negative-electrode terminal 19, and a lithium-electrode terminal 20. Electrons are moved from the lithium electrode 16 to the positive electrode 14 through the first energization control unit 21 a , and lithium ions are doped into the positive electrode 14 from the lithium electrode 16. Electrons are moved from the lithium electrode 16 to the negative electrode 15 through the second energization control unit 21 b , and lithium ions are doped into the negative electrode 15 from the lithium electrode 16. The lithium ions are doped into both of the positive electrode 14 and the negative electrode 15 as described above, whereby the doping time can dramatically be shortened.

1 - 3 . (canceled) 
     
     
         4 . An electric storage device in which ions are doped into at least either one of a positive electrode and a negative electrode, wherein
 the electric storage device being fabricated by a doping process in which the positive electrode and an ion source are connected to each other and the negative electrode and the ion source are connected to each other so as to dope ions into both of the positive electrode and the negative electrode from the ion source.   
     
     
         5 . An electric storage device according to  claim 4 , wherein
 an energizing state between the positive electrode and the ion source is controlled in the doping process by an energization control unit for the positive electrode.   
     
     
         6 . A electric storage device according to  claim 4 , wherein
 in the doping process, an energizing state between the negative electrode and the ion source is controlled in the doping process by an energization control unit for the negative electrode.   
     
     
         7 . An electric storage device according to  claim 4 , wherein
 the positive electrode has a positive-electrode current collector and a positive electrode mixture layer, the negative electrode has a negative-electrode current collector and a negative electrode mixture layer, and through holes are formed on the positive-electrode current collector and the negative-electrode current collector.   
     
     
         8 . An electric storage device according to  claim 4 , having:
 a device structure of a laminated type in which the positive electrode and the negative electrode are alternately laminated, or a structure of a wound type in which the positive electrode and the negative electrode are wound as superimposed with each other.   
     
     
         9 . An electric storage device according to  claim 4 , wherein
 the negative electrode contains at least either one of a soft carbon material and a graphite.   
     
     
         10 . An electric storage device according to  claim 4 , wherein
 the positive electrode contains a vanadium oxide including a layered crystal particles having a layer length of 1 nm or more and 30 nm or less.   
     
     
         11 . An electric storage device according to  claim 10 , wherein
 the layered crystal particles is contained in the vanadium oxide in 30% or more in terms of an area ratio in any cross-section.   
     
     
         12 . An electric storage device according to  claim 10 , wherein
 the vanadium oxide is water-soluble.   
     
     
         13 . An electric storage device according to  claim 10 , wherein
 the vanadium oxide is prepared by evaporating and drying a water solution.   
     
     
         14 . An electric storage device according to  claim 10 , wherein the vanadium oxide is treated at a temperature less than 250° C. 
     
     
         15 . An electric storage device according to  claim 10 , wherein
 the vanadium oxide has a peak within the range of 5 to 15° at a diffraction angle 2θ of X-ray diffraction pattern.   
     
     
         16 . An electric storage device according to  claim 10 , wherein
 the vanadium oxide is treated by using a lithium ion source.   
     
     
         17 . An electric storage device according to  claim 4 , wherein
 the positive electrode contains a conductive material.