Electrochemical recovery of cadmium from spent Ni–Cd batteries

In this work, cadmium from spent Ni–Cd batteries is recycled. Ionic cadmium is recovery from acidic solution using a galvanostatic technique. Electrodeposition charge efficiency and deposit morphology depend on current density. Charge efficiency reaches up to 85.0% for a current density between 5.0 and 10.0 mA cm−2 and decreases with the increase in current density. Pore size decreases with the increase in current density.