| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration of a battery at the time of over discharge by adding at least one of monomer, alloy, compound, which have an oxidization and reduction electrical potential lower than that of a negative electrode collector and higher than that of lithium, in a part having the same electrical potential with the negative electrode or in the negative electrode. SOLUTION: As a monomer, metals such as Mn, V, Cr, Zn, Co, Ni, Ge are used, and Mn, Cr, Zn are desirable. As a compound, Mn(OH)2 , Fe(OH)2 or the like is used, and Mn(OH)2 is desirable. As for an adding quantity, 0.001-20 pts.wt. to an active material of 100 pts.wt. is desirable, and 1-10 pts.wt. is more desirable. As a main structural element of a negative electrode, Cu is desirable, and the monomer, alloy, compound to be added having an oxidization and reduction electrical potential lower than that of Cu in a range of 0.5-2.0 V is desirable, and the monomer, alloy and compound to be added having an oxidization and reduction electrical potential lower than that of Cu in a range of 0.8-1.8 V is more desirable. |
