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A Directory:Capacitors is similar to a battery in that it is a medium for storing electrical energy. However, a capacitor is a much simpler device than a battery, it cannot produce new electrons -- it only stores them. Capacitors that are scaled up to power levels required for delivering power to vehicles and the utility grid are known as Directory:Ultracapacitors.


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Directory:Storage > Directory:Capacitors / Directory:Batteries / Directory:Tesla Motors, Inc. > Tesla CEO: Super-capacitors Trump Electric Car Batteries - Unlike batteries, supercapacitors do not lose the ability to store charge with age. Supercapacitors also have a much higher power density than batteries, and they can provide power far more quickly than existing battery technology. And they can supply up to 95% of the energy used to charge it on discharging. (AllCarsElectric March 24, 2011)


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Directory:Fuel Efficiency / Directory:Storage > Directory:Capacitors > Mazda announces world first capacitor-based regenerative braking system - The i-ELOOP is billed as the world's first passenger vehicle regenerative braking system that uses a capacitor in place of rechargeable batteries to temporarily store energy captured from braking. Mazda claims the i-ELOOP system improves the fuel economy of a vehicle by around 10 %. (News:GizMag November 24, 2011)
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Electric Ultracapacitor Buses Becoming More Feasible - China and Sinautec have been testing a fleet of electric buses equipped with ultracapacitors for quick recharging and zero emissions… and so far it works. Though having a quick charge time (~ 5 min.), these ultracapacitors need to be recharged (every 3.5 miles with air conditioning 5.5 miles without a/c), requiring numerous charging stations and the bus only goes 30 mph. (Gas 2.0 Oct. 21, 2009)


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Directory:Storage > Directory:Capacitors > New Lithium-Ion Ultracapacitor Can Charge Tools In Under 60 Seconds - New York-based company Ioxus has developed a new type of lithium ion ultracapacitor that can potentially deliver large amounts of energy in a small amount of time. This makes them ideal for items that require large amounts of power for acceleration, energy capture, or ‘high power application’ – such as power tools. (Inhabitat January 13, 2011)
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Directory:EEStore - Texas company is working on an "energy storage" device made from ceramics. It's not technically a battery because it doesn't use chemicals. It can allegedly charge within 5 minutes with enough energy to move a car 500 miles on about $9 worth of electricity -- about 45 cents a gallon.

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batScap - Supercapacitors meet applications requiring high power values for short periods (ten seconds) and defined by a very high number of charge / discharge cycles (millions). This technology could replace batteries and fly-wheels and open new prospects for electric and hybrid vehicles.

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Canadian Firm Develops Fast-Charge Ultra-Cap 'Battery' - EPOD International is developing a revolutionary new hybrid battery that can be charged in less than one minute and fully cycled over 100,000 times. It combines the high energy density of batteries with the high power density of capacitors, is not made from rare or expensive elements and is environmentally benign. (EV World May 10, 2007)

NessCap - Ultracapacitor products for portable electronic devices to hi-tech “green? cars. Electric Double Layer Capacitors offer high power, long life. Pseudocapacitors have high energy, low cost.

Maxwell Technologies Ultracapacitors

High Voltage Ultracapacitors

Research and Development

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Latest: There was an error working with the wiki: Code[1] > Directory:Lawrence (Larry) Sadler > TWIFE™ Featuring Larry Sadler - Larry Sadler discussed his ultra-capacitor and H.O.P.E. vehicle technology: 94 mpg using super-efficient genset in electrified vehicle • Report on SHT at Defense Energy Summit • SHT Choice: Open Source or Gag Order from US Military? • Visiting Hutchisons • Syair's Replication of No Back EMF Generator • Bob Sima, Musician, on Stepping into Your Mission (FreeEnergyNews November 30, 2014)
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Directory:Nanotechnology / Directory:Storage > Directory:Batteries / Directory:Capacitors > New battery technology may allow for complete recharging within minutes - New batteries being developed at the University of Illinois, Urbana-Champaign are said to offer all the advantages of capacitors and batteries, in one unit. They have the rapid charge/discharge capability of capacitors, while also having the ability to store large amounts of energy, like batteries. (News:GizMag March 21, 2011)

Directory:Storage > Directory:Capacitors > International research team develops ultrahigh-power energy storage devices - A team of researchers from the U.S. and France report the development of a mirco-supercapacitor with remarkable properties. The paper will be published in the premier scientific journal Nature Nanotechnology online. These micro-supercapacitors have the potential to power nomad electronics, wireless sensor networks, biomedical implants, active RFID tags... (PhysOrg August 17, 2010)

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Ultracaps Could Boost Hybrid Efficiency - Energy storage devices called ultracapacitors could lower the cost of the battery packs in plug-in hybrid vehicles by hundreds or even thousands of dollars by cutting the size of the packs in half, made more feasible by advances being made in the industry. (MIT Technology Review August 20, 2009)

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New Battery Could Recharge in Seconds - A new battery material that recharges 100 times faster than the lithium-ion in your laptop has been revealed by researchers at MIT according to Nature News. (Wired March 11, 2009)

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Researchers Develop Graphene-Based Ultracapacitors Potential for Doubling Storage Capacity of Current Materials - University of Texas at Austin developed a new class of carbon material—chemically modified graphene (CMG)—that is made from a 1-atom thick sheet of carbon. CMG materials can be functionalized as needed, and the researchers demonstrated their performance in an ultracapacitor cell. (GreenCar Congress Sept 16, 2008)

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Ultracapacitors Soon to Replace Batteries? - The synergy between batteries and capacitors — two of the sturdiest and oldest components of electrical engineering — has been growing to the point where ultracapacitors may soon be almost as indispensable to portable electricity as batteries are now. (IEEE Spectrum Nov. 2007) (See also Slashdot)

A Backup Power System Using Ultracapacitors

Using Ultracapacitors in Utility Applications

Carbon Nanotube Enhanced Ultracapacitors - Our analysis shows that the utilization of a matrix of vertically aligned Carbon Nanotubes as electrode structure, can lead to an ultracapacitor characterized by a power density greater than 100kW/kg (three orders of magnitude higher than batteries), a lifetime longer than 300,000 cycles, and an energy density higher than 60Wh/kg.


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Directory:Electromagnetic > Variable Torque Motors - Axial field weakening yields higher efficiency over the rpm range, creating a "built-in" Directory:Transmissions that mechanically enables an operating range up to 10x the motor base speed for electric vehicles. VTM offers hybrid retrofit packages installed on the drive shaft of rear wheel drive vehicles using Maxwell BoostCap™ ultracapacitors for energy storage.

Ultracapacitors Store Energy in a Hybrid Electric Vehicle

Ultracapacitors - An Explanation from the National Renewable Energy Laboratory

See also

PowerPedia:Capacitors - encyclopedic entry at PESWiki


Directory:Batteries at PESWiki



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