| 摘要 |
PURPOSE:To enable quick charge and discharge with high energy density by using a lead foil, which contains a specified amount of lead, for the collector of a negative pole wherein Na alloy, the mixture of Na alloy and carbon material, or the mixture of Na alloy and conductive macromolecules is used. CONSTITUTION:In a secondary battery which consists of a positive pole, a negative pole, and a nonaqueous electrolyte and for the negative pole of which Na alloy, the mixture of Na alloy and carbon material, or the mixture of Na alloy and conductive macromolecules is used, a lead foil, which contains 90wt.% or more lead, is used for the collector of the negative pole. For the lead foil, pure lead or one, which contains 10% or less other ingredients, will do. As the other ingredients, Sn alloyable with Na similar to lead, Sb, Cd, Ca, or the like, which improves the strength of the lead foil, is desirable. For the thickness of the lead foil, there in no special limitation, but 5-100mum is desirable. It is to be desired that the ratio of the atom of the lead to that of Na of the collector should be within the range of 1:1 to 1:4. |
