Chemistry in Context: Batteries and Energy Storage

Flashcards about batteries, galvanic cells, redox reactions, and energy storage.

Galvanic Cell

A device that converts the energy released in a spontaneous chemical reaction into electrical energy.

Reduction

A process where electrons are added to a substance.

Oxidation

A process where electrons are lost from a substance.

Electricity

The flow of electrons from one region to another that is driven by a difference in potential energy.

Electrodes

Electrical conductors placed in a cell as sites for chemical reactions.

Anode

Oxidation takes place at this location.

Cathode

Reduction takes place at this location.

Battery

A system for the direct conversion of chemical energy to electrical energy.

Primary Batteries

Batteries that are not rechargeable.

Secondary Batteries

Batteries that are rechargeable.

Energy Density

Relates both to the number of ions stored in the electrode and the weight or volume of the battery.

Supercapacitors

Have a very fast charge time, high cycle life, and moderate energy.

Hybrid Electric Vehicles (HEVs)

Combine the use of gasoline and battery technologies.

Fuel Cell

A galvanic cell that produces electricity by converting the chemical energy of a fuel directly into electricity without burning the fuel.

Metal Hydrides

The safest way to store hydrogen gas.