Lead Acid Battery: Advantages and Disadvantages

The anode is cadmium and the cathode is nickel oxide (NiO2).

The electrolyte is a solution of KOH.

The cell voltage is fairly constant at about 1.4 volts.

<p>The NICAD battery operates when cadmium is oxidized to Cd2+ ions and insoluble Cd (OH)2 is formed. Ni2+ ions then combine with OH- ions to form Ni (OH)2.</p> Signup and view all the answers

<p>Cd(s) + 2NiO2(s) + 2H2O(l) ightarrow Cd(OH)2(s) + 2Ni(OH)2(s)</p> Signup and view all the answers

<p>Longer life than lead storage cell, available in a wide range of sizes, good load performance, compact and lighter, can be packed and sealed, lowest cost in terms of cost per cycle</p> Signup and view all the answers

<p>Very expensive, cadmium is highly toxic, relatively low energy density, relatively high self-discharge</p> Signup and view all the answers

<p>By passing an excess current in the opposite direction to that of the cell current</p> Signup and view all the answers

<p>A higher energy density can be achieved with a metal hydride electrode compared to a cadmium electrode.</p> Signup and view all the answers

<p>Nickel-metal hydride batteries are considered more environmentally friendly as they are free of Cd, reducing disposal problems associated with rechargeable nickel batteries.</p> Signup and view all the answers

<p>Emergency power applications, communication equipment, electronic calculators, electronic flash units, transistors, battery powered small tools, aircraft, and space satellites.</p> Signup and view all the answers

<p>Positive plate of highly porous sintered or felt nickel substrate impregnated with nickel hydroxide, negative plate using a perforated LaNi 5 alloy grid.</p> Signup and view all the answers