Surface-treated plate for alkaline secondary battery, and method for manufacturing same
A secondary battery, surface treatment technology, applied in the direction of alkaline storage battery, alkaline storage battery electrode, electrode manufacturing, etc., can solve the problems of hydrogen generation, battery performance degradation, battery leakage, etc.
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no. 1 approach 》
[0055] Embodiments for carrying out the present invention will be described below, but the present invention is not limited to the following embodiments.
[0056] It should be noted that the surface-treated plate for alkaline secondary batteries of the present invention is suitable for current collectors, tabs / leads, and outer packaging of alkaline secondary batteries, and is suitable for use as a current collector for negative electrodes of alkaline secondary batteries. body material.
[0057] figure 1 It is a cross-sectional view schematically showing the surface-treated plate 100 for an alkaline secondary battery according to this embodiment.
[0058] Such as figure 1 As shown, the surface-treated plate 100 for an alkaline secondary battery according to this embodiment has a base material 10 and a metal layer 20 formed on at least one surface of the base material 10 .
[0059] Here, the metal layer 20 includes an alloy layer 20M including nickel and zinc. Furthermore, t...
no. 2 approach 》
[0113] Next, a second embodiment for carrying out the present invention will be described. In addition, the description of the common points with the above-mentioned first embodiment is omitted, and the main points of difference will be described.
[0114] Such as image 3 As shown, in the surface-treated sheet for alkaline secondary batteries in this embodiment, there is a region (second region 20B) having a Ni ratio lower than that of the first region 20A in the upper layer (the side away from the substrate 10 ) of the first region 20A. . Furthermore, in the second region 20B, the ratio of Ni to the total amount of Ni and Zn is preferably 0 to less than 60%.
[0115] That is, as described above, in the present embodiment, the alloy layer 20M can be formed by forming a Ni plating layer and a Zn plating layer by electroplating, followed by thermal diffusion treatment. At this time, the depth of diffusion of Ni into the Zn plating layer varies depending on the time and tempe...
no. 3 approach 》
[0123] Next, a third embodiment for carrying out the present invention will be described. It should be noted that the description will be omitted for the points common to the above-mentioned first embodiment, and the different points will be mainly described.
[0124] Such as Figure 4 As shown in (a), the surface-treated plate for alkaline secondary batteries in this embodiment further contains Ni in a ratio of more than 85% to 100% of the total amount of Ni and Zn between the base material 10 and the first region 20A. % of the third region 20C.
[0125] The effect of forming a region with a high ratio of Ni between the base material 10 and the first region 20A as in the present embodiment is as follows.
[0126] That is, the third region 20C in which the ratio of Ni to the total amount of Ni and Zn exceeds 85% is preferable because the resistance to the alkaline electrolyte is high as described above. In addition, when the ratio of Ni is high, generally speaking, it is no...
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Abstract
Description
Claims
Application Information
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