In this video excerpt from NOVA’s "Making Stuff: Cleaner" with host and New York Times technology columnist David Pogue, learn how materials scientists are designing new kinds of batteries that could power the next generation of electric vehicles. Watch one of the world’s fastest electric motorcycles, powered by the equivalent of 150 car batteries, accelerate to 60 mph in less than one second. In a related activity, students build their own environmentally cleaner batteries using common materials while learning about batteries, circuits, issues surrounding battery disposal, and the efforts of materials scientists to build cleaner batteries.
Making Stuff Cleaner Activity (Document)
What Is Materials Science? (Document)
DAVID POGUE In all batteries, electricity is created by a chemical reaction. There are two metals, called electrodes, that want to exchange electrons. But between them is a third material, called an electrolyte, that keeps the electron transfer in check.
But, if we give those electrons an easier path from one electrode to the other, like through a circuit, say the bulb in your flashlight or the electronics in your phone, the flow begins, creating an electric current.
In a car battery the electrodes are made of lead and lead dioxide, and the electrolyte is sulfuric acid. That's enough juice to spark ignition and to power forklifts and golf carts, but not the engine of a car. They just don't hold or put out enough power.
But now scientists are mixing up materials to get more bang out of batteries, like zero to 60 in less than a second,...
...packing the power of 150 car batteries onto this small frame.
The wobble you see in the picture is our TV camera's way of saying "Woooooo!"
With over 500 horsepower, this bike is one of the fastest electric motorcycles in the world. Its battery pack could easily power an electric car.