Classification of Fuels and Calorific Value

The main disadvantages mentioned are: 1) They are expensive, 2) They are not available in standard cell types, 3) Electrolyte breakdown into flammable gases by overheating.

The applications mentioned are: 1) Cameras, calculators, smartphones and consumer electronics, 2) Cardiac pacemakers and implantable devices, 3) Electric vehicles like cars, aircraft, wheelchairs, models etc.

The basic principle of fuel cells is identical to electrochemical cells, where chemical energy from a fuel-oxidation system is converted into electrical energy.

<p>In a fuel cell, the chemical energy is provided by a fuel and an oxidant stored outside the cell, which are continuously and separately supplied to the electrodes.</p> Signup and view all the answers

<p>Fuel cells are capable of supplying current as long as the outside supply of fuel is maintained.</p> Signup and view all the answers

<p>The examples given are: 1) H2-O2 fuel cell, 2) Methanol-O2 fuel cell</p> Signup and view all the answers

<p>Fuel + oxygen → Oxidation products + Electricity</p> Signup and view all the answers

<p>Li-ion batteries are preferred because of their light-weight.</p> Signup and view all the answers

<p>Cordless drills, sanders, saws, and garden equipment like whipper-snippers and hedge trimmers.</p> Signup and view all the answers

<p>The Mars Curiosity rover</p> Signup and view all the answers