| 摘要 |
PURPOSE:To improve cycle properties by making a negative pole using a material which is immersed in an organic solvent in which at least one kind of salts of metals electrochemically nobler than lithium is dissolved. CONSTITUTION:A negative pole 1 is press-bound to a negative pole electric collector 3 fixed to the inner bottom face of a negative polar can 2. As a negative polar material, lithium immersed in an organic solvent in which at least one kind of salts selected from nitrates. nitrites, bromides, etc. of metals nobler than lithium is dissolved. As a result, a part of these metal ions in the treatment solution are ion-exchanged with the lithium metal on the negative polar surface and an inert coating on the lithium surface is removed by this reaction and further the metals nobler than lithium precipitate. Consequently, the charge and discharge active level increases and at the time of discharge, the lithum surface is dissolved uniformly and current convergence is suppressed during charging time and thus dendrite of lithium hardly grows and furthermore, charge and discharge efficiency is improved due to the precipitation of the metals nobler than lithium. Cycle properties are thus improved. |
