Nickel Cadmium Battery Reaction Equation

In eqns 4 6 the cell reactions during charging and discharging are presented.

Nickel cadmium battery reaction equation.

The abbreviation ni cd is derived from the chemical symbols of nickel. The nickel cadmium battery ni cd battery or nicad battery is a type of rechargeable battery using nickel oxide hydroxide and metallic cadmium as electrodes. The electrolyte is a solution of potassium hydroxide koh with a small addition of lithium hydrate which increases the capacity and life of the battery. The active material of the positive plate anode is ni oh 4 and the negative plate cathode is of cadmium cd when fully charged.

When fully charged the positive plate is ni oh 2 and negative plate is cd oh 2 while discharging the positive plate converts into ni oh 3 and the negative plate is converted into pure cd. First the rate of hydrogen formation on cadmium is very slow compared with that on pure zinc or pure. Nickel cadmium battery contributors and attributions rechargeable batteries also known as secondary cells are batteries that potentially consist of reversible cell reactions that allow them to recharge or regain their cell potential through the work done by passing currents of electricity. Nickel cadmium batteries are used in various developmental electric vehicles.

The reactions at the nickel oxide electrode are. The chemical conversion is reverted when a discharged battery is charged again. A nickel cadmium cell has two plates. And our two products cadmium hydroxide and nickel hydroxide are both solids that precipitate on the electrodes in the battery and that makes it easy to reverse the reaction because if you re reversing your reaction you need to start with cadmium hydroxide and nickel hydroxide and those are already there so it s easy to reverse this.

Nickel cadmium batteries at the 1 2h rate yield twice the energy density of lead acid batteries i e. In the case of the nickel cadmium battery the cadmium electrode has two important features. They operate over a wide temperature range give approximately 2000 cycles and can be charged in less than 1 h.