| abstract |
The present invention relates to a lithium ion supply core portion including an electrolyte; an internal current collector having an open structure formed surrounding an outer surface of the lithium ion supply core portion, and an internal electrode active material formed on the surface of the internal current collector An internal electrode comprising an electrolyte absorption layer formed on the outer surface of the internal electrode active material layer; and a separation layer formed around the outer surface of the internal electrode to prevent a short circuit of the electrode; and an outer surface of the separation layer An external electrode including an external electrode active material layer and an external current collector, and having a horizontal cross section with a predetermined shape and extending in a length direction. Since the lithium ion supply core part including the electrolyte of the present invention is located inside the internal electrode, and the internal electrode has an open structure, the electrolyte of the lithium ion supply core part easily penetrates into the active material of the electrode. Can be easily supplied and exchanged. Moreover, since the internal electrode of this invention is equipped with an electrolyte absorption layer in an outer surface, the electrolyte of a lithium ion supply core part can be contained inside an internal electrode, and supply and replacement | exchange of lithium ion are assisted. [Selection] Figure 1 |