Be sure to discharge the capacitor before working on any motor. Capacitors store energy and can emit a serious and potentially dangerous jolt of electricity.
In a pinch you can make a capacitor from two pieces of aluminum foil and a piece of paper that will act as the dielectric.
An electrolytic is a capacitor that is made of electrolyte and is basically conductive salt in solvent.
Tantalum capacitors are made of tantalum pentoxide and used with a material called tantalum for the electrodes. This type of capacitor has excellent temperature and frequency characteristics.
Super capacitors are electric double layer capacitors which have a capacitance of 0.47 Farad.