CELL AND METHOD OF PRODUCING THE SAME

摘要

A cell developed to solve the problems of a conventional cell that since it is provided with an element having a PTC function outside the cell or outside an electrode of the cell as a safety device, the temperature rise of the cell gives rise to a heavy short-circuit current so as to cause the temperature to be further raised and the short-circuit current to further increase, and that since the element is incorporated in the cell, the structure of the cell is complex and the volume energy density is low. Specifically a cell in which at least either a positive electrode (1) or a negative electrode (2) is provided with an active material layer (6) containing an active material (8) and an electron conductive material (9) in contact with the active material (8), and an electrolyte layer (3) is sandwiched between the positive electrode (1) and the negative electrode (2) to constitute a cell body which is sealed with a covering member (20). The electron conductive material (9) contains an electrically conductive filler and a resin and has a resistance increasing with temperature. The cell body is sealed with the covering member (20) so that no extra space is formed inside.