Marine Engine Q & A- Electrical-Nickel-Cadmium Storage Batteries

Nickel-Cadmium Storage Batteries
The active materials of positive and negative plates In each cell of a charged nickel-cadmium battery (Fig 1.2) are nickel hydrate and cadmium, respectively. The chemicals are retained in the supporting structure of perforated metal plates and the design is such as to give maximum contact between active compounds and the electrolyte.

The strong alkaline electrolyte is a solution of potassium hydroxide in distilled water (with an addition of lithium). The ions produced in the formation of the potassium hydroxide solution (K+ and OHˉ) act as current carriers and take part in an ion transfer.