Will the much needed breakthrough battery please stand up?
At a local event surrounding the press tour of the Ford Focus plug-in, one speaker tried to simplify the complex chemistry and physics of battery power by saying you take anything from the left of the Periodic Table and mix it with something from the right side and you create something that wants to explode. Batteries slow this process to where we can tap this explosive energy over time.
Given the right ambient conditions and flaws, the lead-acid batteries in our cars as well as the lithium-ion batteries in Dreamliners can overheat, cause fires or even explode.
A just posted AP story explains this is the main reason our cities aren’t filled with electric cars right now – it is the batteries that are holding us back. The lithium-ion battery is the latest level of battery technology and it has been around for nearly 25 years.
Many people look to the leading authority on battery technology John Goodenough, the man that essentially made first commercial lithium-ion batteries possible back in 1991. He will be honored with the National Medal of Science at the White House next month at the age of 90.
Currently the engineering professor at the University of Texas at Austin, Goodenough told the AP, "I'm working on it. I'm optimistic in a sense that I'm willing to keep working on it. I think we can do some interesting things."
Boeing made extensive use of lithium-ion technology in the design of their new airplane. This was the ultimate cause of a fire aboard a Dreamliner in Boston, and another such incident in Japan. These events were sufficient to lead authorities to ground the fleet worldwide, but the problem of overheating batteries is not a new one.
Just six years ago, during 2006 and 2007, over 46 million cellphone and 10 million laptop batteries were recalled for risks of overheating, short-circuiting and exploding. These were all lithium-ion batteries and this resulted in the addition of safety features in consumer electronics.
This problem is produced by the fact we are working at cross purposes – if a battery is good at storing energy, it is slow to give it up. If it is good at releasing energy, it is a poor way to store it. In a nutshell, this is why it’s not easy to get great range out of a single charge in an electric car.
"We need to leapfrog the engineering of making batteries," stated Lawrence Berkeley National Lab battery scientist Vince Battaglia. "We've got to find the next big thing."
No one really has a clue what that will be or when it will become apparent.
The Obama administration has spent more than $2 billion to spark innovation in the advanced battery industry, simply because they are crucial to a greener energy future. This level of concentration in one area of science has not been seen since the Manhattan Project was charged with developing the atomic bomb.
“To make the next breakthrough, researchers will have to master complex chemistry, expensive manufacturing, detailed engineering, a variety of different materials, lengthy testing, stringent safety standards and giant cost problems,” Glenn Amatucci, director of the Energy Storage Research Group at Rutgers University told the AP.
“It involves dealing with liquids and solids, metals and organic chemicals, and things that are in between. We're dealing with a system that you can imagine is almost alive, it’s almost breathing," he said. "Trying to understand what's happening within these batteries is incredibly complex."
At the level of cellphones, the problems with lithium ion batteries are manageable, but to power bigger things like cars and airplanes, multiple cells are grouped together, magnifying the problems of overheating and flammability. The battery pack in the Boeing 787 weighs 63 pounds and 19 inches long.
"You can't get around the fundamental thing is that lithium-ion batteries are stuffed full of flammable liquid," said Carnegie Mellon University materials science professor Jay Whitacre.
Lithium-ion batteries are more dangerous due to the electrolyte used. That’s the liquid that lets electrons swim from one electrode to the other within the battery. The fluid is more flammable than the electrolyte in older batteries, such as lead-acid batteries and the nickel cadmium batteries us in Toyota hybrids, video equipment and power tools.
"The big advances in battery technology happen rarely. It's been more than 200 years and we have maybe five different successful rechargeable batteries," said George Blomgren, a former senior technology researcher at Eveready and now a private battery consultant. "It's frustrating."
The first battery was invented by Alessandro Volta — for whom the volt is named — in 1800. Since then, we have developed internal combustion engines, telephones, cars, airplanes, transistors, computers and flash memory, while the lowly battery remained much the same.
The lead-acid car battery "has been around for 150 years more or less," Whitacre said. "This is a remarkable testament to first how robust that chemistry is and how difficult change is."