As a Power Tool Batteries Supplier, let's share with you the advantages of Ni-Cd Battery.
Ni-Cd Battery The positive active material is mainly made of nickel, and the negative active material is mainly an alkaline storage battery made of cadmium. The positive electrode is nickel hydroxide, the negative electrode is cadmium, and the electrolyte is a potassium hydroxide solution. Its advantages are light weight, shock resistance and long life, and it is often used in small electronic devices.
The positive electrode material of Ni-Cd Battery is a mixture of nickel hydroxide and graphite powder, and the negative electrode material is sponge mesh cadmium powder and cadmium oxide powder, and the electrolyte is usually sodium hydroxide or potassium hydroxide solution. When the ambient temperature is high, a sodium hydroxide solution having a density of 1.17 to 1.19 (at 15 ° C) is used. When the ambient temperature is low, a potassium hydroxide solution having a density of 1.19 to 1.21 (at 15 ° C) is used. When the temperature is below -15 ° C, a potassium hydroxide solution having a density of 1.25 to 1.27 (at 15 ° C) is used. In order to balance the low temperature performance and the charge retention capability, the sealed nickel-cadmium storage battery uses a potassium hydroxide solution having a density of 1.40 (at 15 ° C). In order to increase the capacity and cycle life of the battery, a small amount of lithium hydroxide (about 15 to 20 g per liter of electrolyte) is usually added to the electrolyte.
After charging the Ni-Cd Rechargeable Battery, the active material on the positive electrode plate becomes nickel hydroxide [NiOOH], and the active material on the negative electrode plate becomes metal cadmium; after the Ni-Cd Battery is discharged, the active material on the positive electrode plate becomes hydrogen. Nickel oxide, the active material on the negative electrode plate becomes cadmium hydroxide.
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