| 摘要 |
PROBLEM TO BE SOLVED: To inhibit deposition of a mix on a metal lithium and prevent reduction of the capacity caused by a reaction unevenness on a plate surface and precipitation of lithium on a negative electrode surface by providing a carbon material capable of absorbing and releasing a lithium ion and a metal lithium on a negative electrode plate and disposing a lithium ion-permeable sheet on the metal lithium. SOLUTION: A metal lithium used as a negative electrode material for a non-aqueous electrolyte secondary battery is a soft substance and since fine powders of a mix is adhered and the mix is easy to be peeled off when the metal lithium contacts a plate, an ion-permeable sheet is adhered onto the metal lithium, a removal of the mix is prevented and a charge/discharge reaction is made uniform. Further, air permeability of the sheet is made to 0.5-100 sec/100cc/cm2, a reduction of a discharge performance is not caused and dropping off of the mix is prevented. Moreover, the press-fit strength of the sheet is made 0.1-1 kgf/cm2, dropping off of the sheet and a damage to the lithium are not caused and the sheet is adhered onto the metal lithium. |
