Fuel+cell

[|Fuel cell] - an electrochemical device similar to a battery, but differing from the latter in that it is designed for continuous replenishment of the reactants consumed; i.e. it produces electricity from an external fuel supply as opposed to the limited internal energy storage capacity of a battery. Typical reactants used in a fuel cell are hydrogen on the anode side and oxygen on the cathode side (a hydrogen cell).

[|Fuel cells] - a hydrogen battery—just another battery! From the car’s standpoint, you’re driving on electricity, whether you’re taking it out of a battery or a fuel cell stack. You need similar power electronics; motors; it's very quiet; there are no shift points. A fuel-cell vehicle is fact an EV because, like a battery vehicle, it stores chemical energy that is later released in the form of electricity. It's just that fuel cells can be refilled—with hydrogen—whereas batteries must be recharged.

[|Toyota's fuel cell sedan] features performance similar to a gasoline engine vehicle, with a cruising range of approximately 700 km and a refueling time of roughly three minutes. When driven, it emits only the water vapor produced by the reaction between hydrogen and oxygen.

[|FuelCell history] - The concept of a fuel cell had effectively been demonstrated in the early nineteenth century.


 * What's the problem?**
 * **Ask** * **Imagine** * **Design, Build** * **Improve**


 * That's engineering**
 * [|chemical reaction] - a process involving one, two or more substances (called reactants), characterized by a chemical change and yielding one or more product(s) which are different from the reactants.
 * [|Third law of thermodynamics] - any closed system will tend to minimize its free energy. Without any outside influence, any reaction mixture, too, will try to do the same.
 * [|catalyst] - substance that causes or speeds a chemical reaction without itself being affected

> chemical reaction, hydrogen, electric motor, chemical energy, electricity, electrochemical, reactant, catalyst, fuel, storage, electrolysis
 * Engineering ideas**

Challenges for you to work on...
 * Do It**
 * [|Alka-Seltzer Rocket LEGO Cars] - Build a LEGO car that’s powered with a chemical reaction. This simple LEGO science activity uses just LEGO bricks, a film canister, and Alka Seltzer tablets. The link includes building directions, as well as discussion questions to ask, and data to gather and analyze.
 * [|Fuel call cars] - four experiments with a hydrogen fuel cell to learn how to fill the unit, decompose water through electrolysis, measure the amount of gas produced and test the gases generated.


 * News, updates**


 * Learn more...**
 * [|FuelCell Today] - history, applications

..r1