With some incremental improvements (which are already happening), this could become very practical and it wouldn't be surprising if in the near future we saw some electric buses
using ultracapacitors instead of heavier and more expensive chemical batteries.
Via Technology Review More About Ultracapacitors MIT: Move Over Batteries, Here Come the Nanotube - Enhanced Capacitors Triple Hybrid with Ultracapacitors Hits the Road Hybrid Proplusion Vehicles
Using Ultracapacitors More Hybrid Cars Toyota Could Buy Lithium - Ion Batteries for Hybrids from Sanyo Toyota Might Not Make a Yaris - Based Hybrid After All... For Now More Electric Cars Ford's Electric Cars Will Talk to the Power Grid, Pick Least Expensive Electricity Rates Tesla's New HQ and Powertrain Facilities Will be in Palo Alto
AFS Trinity Power in Bellevue, Washington, recently displayed a modified hybrid SUV that
uses ultracapacitors alongside batteries and an internal combustion engine, and major manufacturers such as Honda and Toyota have also been experimenting with the technology.
Using ultracapacitor energy storage to further reduce life cycle costs, this next - generation hybrid bus has achieved Ultra Low Emission Bus certification with 37 % lower greenhouse gas... Read more →
Not exact matches
OK, so that's pretty technical, but essentially it boils down to this: the
ultracapacitor / lithium - ion battery replaces the traditional lead - acid battery in the hood of your car, and it stops and starts when the car is idling, reducing both emissions and fuel
use.
Ultracapacitors using nanotubes have gone on to be a success, notably through FastCap Systems, a firm founded by John Cooley, also from MIT.
Using an onboard source of energy (such as a battery,
ultracapacitor, solar panel or any combination thereof), the electrodes will send an electrical current into the plasma, causing the plasma to push against the neutral (noncharged) air surrounding the craft, theoretically generating enough force for liftoff and movement in different directions (depending on where on the craft's surface you direct the electrical current).
Maxwell Technologies» recent contract win to supply Zhejiang Geely with a complete
ultracapacitor module for
use in mild - hybrid vehicles marks a turning point both for the company and the advanced energy - storage technology.
The new nanotube - enhanced
ultracapacitors could be made in any of the sizes currently available and be produced
using conventional technology.
The LEES
ultracapacitor has the capacity to overcome this energy limitation by
using vertically aligned, single - wall carbon nanotubes — one thirty - thousandth the diameter of a human hair and 100,000 times as long as they are wide.
Today's
ultracapacitors use electrodes made of activated carbon, which is extremely porous and therefore has a very large surface area.
The
use of
ultracapacitors in hybrids isn't a new idea.
Mark Verbrugge, director of the materials and processes lab at GM, says that of the two
uses for
ultracapacitors, it will be easier to
use them in microhybrids.
They are continuing to test
ultracapacitors to demonstrate that they can make batteries last longer, which would allow automakers to
use smaller batteries and save money.
Ultracapacitors and Micro-Hybrids Ultracaps could also be
used in microhybrids because they require much less energy storage than full hybrids or PHEVs.