Electrochemical studies with plastic bonded zinc electrode for alkaline secondary batteries

The effects of small addition of CdO, Ca(OH)(2) and Zn dust to the plastic bonded zinc electrode have been evaluated through triangular potential swee p voltammetry, potentiodynamic polarization (with temperature effect), impe dance measurements, solution analysis and Porosity measurements. In the cas e of CdO additive, a composition of 2 % is preferred because of its enhance d ageing behaviour, goad high temperature performance and minimum shape cha nge despite its increased standby corrosion. 1 % Ca(OH)(2) gives both good ageing behaviour as well as minimum idle corrosion. The additive Zn dust is not recommended owing to its poor ageing behaviour. Based on the above res ults, the suitable zinc electrode composition is suggested.