| abstract |
A sheet-like electrode group, and an exterior body that accommodates the electrode group, the electrode group having a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode, and an inner surface of the exterior body And a thin battery in which a lubricating substance having a lubricating action is interposed between the electrode group, and the lubricating substance is, for example, an inert gas. The inert gas includes, for example, at least one of nitrogen and argon. It is desirable that the lubricating substance be present at least between the end surfaces on both sides in the thickness direction of the electrode group and the main flat surface of the inner surface of the exterior body facing the end surfaces. |