For
decades, battery storage technology has been a heavy weight on the back
of scientific innovation. From cell phones to electric vehicles, our
technological capabilities always seem to be several steps ahead of our
ability to power them. Several promising new technologies are currently
under development to help power the 21st century, but one small start-up
looks especially well positioned to transform the way we think about
energy storage.
Texas-based
EEStor, Inc. is not exactly proposing a new battery, since no chemicals
are used in its design. The technology is based on the idea of a solid
state ultra capacitor, but cannot be accurately described in these terms
either. Ultra capacitors have an advantage over electrochemical
batteries (i.e. lithium-ion technology) in that they can absorb and
release a charge virtually instantaneously while undergoing virtually no
deterioration. Batteries trump ultra capacitors in their ability to
store much larger amounts of energy at a given time.
EEStor’s take on the ultra capacitor — called the
Electrical Energy Storage Unit, or EESU — combines the best of both
worlds. The advance is based on a barium-titanate insulator claimed to
increase the specific energy of the unit far beyond that achievable with
today’s ultra capacitor technology. It is claimed that this new advance
allows for a specific energy of about 280 watts per kilogram — more
than double that of the most advanced lithium-ion technology and a
whopping ten times that of lead-acid batteries. This could translate
into an electric vehicle capable of traveling up to 500 miles on a five
minute charge, compared with current battery technology which offers an
average 50-100 mile range on an overnight charge. As if that weren’t
enough, the company claims they will be able to mass-produce the units
at a fraction the cost of traditional batteries.
"It’s
a paradigm shift," said Ian Clifford of ZENN Motor Co., an early
investor and exclusive rights-holder for use of the technology in
electric cars. "The Achilles’ heel to the electric car industry has been
energy storage. By all rights, this would make internal combustion
engines unnecessary."
But this small electric car
company isn’t the only organization banking on the new technology.
Lockheed-Martin, the world’s largest defense contractor, has also signed
on with EEStor for use of the technology in military applications.
Kleiner Perkins Caufield & Byers, a venture capital investment firm
who counts Google and Amazon among their early-stage successes, has also
invested heavily in the company.
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