Negative electrode for alkaline storage battery and alkaline storage battery
A storage battery and negative electrode technology, which is applied in the direction of alkaline battery electrodes, alkaline storage batteries, battery electrodes, etc., can solve the problems of discharge capacity and discharge voltage drop, alkaline battery cycle life drop, and hydrogen storage alloy corrosion resistance deterioration. , to achieve the effect of preventing the increase of internal impedance, good storage characteristics, and suppressing the decrease of discharge capacity and discharge voltage
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Embodiment 1
[0037] In Example 1, when producing an alkaline storage battery, the negative electrode and positive electrode produced as follows were used.
[0038] Manufacture of negative electrode
[0039] When manufacturing the negative electrode, Nd, Mg, Ni, and Al are mixed into a predetermined alloy composition, melted in an argon atmosphere using a high-frequency wave induction melting furnace, and then cooled to obtain a hydrogen storage alloy ingot.
[0040] Then, after heat-treating the ingot of the hydrogen storage alloy in an inert atmosphere to make it homogenized, the ingot of the hydrogen storage alloy was mechanically pulverized in an inert atmosphere and classified to obtain a composition of Nd 0.90 Mg 0.10 Ni 3.33 al 0.17 hydrogen storage alloy powder. In addition, the composition of the above-mentioned hydrogen storage alloy was measured by induction coupling plasma spectrometry (ICP). In addition, the particle size distribution of the hydrogen absorbing alloy powder...
Embodiment 2~4
[0052] In Examples 2 to 4, in the production of the negative electrode of the above-mentioned Example 1, the amount of the dispersion liquid of the above-mentioned FEP added with respect to 100 parts by weight of the above-mentioned hydrogen-absorbing alloy powder was changed, and the amount of FEP with respect to the solid content of the hydrogen-absorbing alloy powder The weight is 0.50% by weight in Example 2, 0.25% by weight in Example 3, and 0.10% by weight in Example 4. In addition, it is the same as the case of the above-mentioned Example 1, and produced The alkaline accumulator of embodiment 2~4.
Embodiment 5
[0054] In Example 5, in the manufacture of the negative electrode of the above-mentioned Example 1, the negative electrode was produced without adding the dispersion of the above-mentioned FEP to 100 parts by weight of the above-mentioned hydrogen storage alloy powder, and on the surface of the negative electrode, the hydrogen storage The alloy powder has a solid content of FEP of 0.60% by weight, except that the above-mentioned dispersion of FEP is applied and dried. In the same manner as in the above-mentioned Example 1, the alkaline powder of Example 5 was produced. storage battery.
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