| 摘要 |
PURPOSE:To increase adhesion of an alloy negative electrode with a current collector by placing a lithium thin plate and a metal thin plate to be easily alloyed with lithium on a current collector, and heat-pressing the inner bottom of a negative can, the current collector, the lithium thin plate, and the metal thin plate to join them. CONSTITUTION:A current collector 22 is welded to the inner bottom of a negative can 12, and a lithium thin plate 20a and a metal thin plate 20b to be alloyed with lithium are stacked on the current collector 22, and they are heat-pressed against the inner bottom of the negative can 12. In the initial stage of the heat-pressing process, the lithium thin plate 20a and the metal plate 20b easily bite into the current collector and come into close contact each other, and the metal 20b is gradually alloyed. The alloying of the metal thin plate (Al) with lithium thin plate, and adhesion of these metals to the inner bottom of the negative can are performed at the same time. Thereby, the adhesion of the negative material with the current collector is increased and irregular deformation caused by alloying is prevented. |
