Sentences with phrase «electrode surface area»

According to the company, «GridShift's new method for hydrogen generation produces four times more hydrogen per electrode surface area than what is currently reported for commercial units today.

Not exact matches

He knew that the charge a capacitor could store depended on the surface area of its electrodes.

The results of this work could lead to the ability to design materials that have extensive surface areas that can be used in batteries as high durability silicon electrodes.

These electrodes must have a high surface area per unit weight, high electrical conductivity and capacitance and be physically robust so they do not degrade during operation in liquid or hostile environments.

One benefit of the film - based electrodes is that their large surface area relative to their volume allows electron carriers such as lithium to ferry charges out quickly, providing a quick burst of power.

To boost storage capacity, microengineers have sought to give their electrodes some extra heft without cutting down on surface area.

Ute Neugebauer, who works at Leibniz - IPHT and the University Hospital Jena points to tiny electrodes that are fixed on the surface of a stamp - sized chip: «Electric fields secure bacteria in a very small area.»

But if mechanical force is applied to move one electrode, the change lowers the surface area where the two electrodes interact.

High electrical conductivity and large accessible surface area, which are required for ideal electrode materials in energy devices, are opposed to each other in current materials.

The researchers built their composite electrolyte to be tough and conductive and still present the maximum surface area to electrodes to provide a solid path for current.

To locate these areas, surgeons implant electrodes across the surface of the brain that need to stay in place for many days.

Because of their repeating patterns, fractal electrodes provide a large surface area that holds more electrical charge than the Euclidean electrodes, said the study's lead author, William J. Watterson, a doctoral student of Taylor's.

The nanotubes drastically increase the surface area of the ultracapacitor electrode, allowing it to hold 20 times as much energy.

The researchers designed the electrodes at the nanoscale — thousands of times thinner than the thickness of a human hair — to ensure the greatest surface area would be exposed to water, which increases the amount of hydrogen the device can produce and also stores more charge in the supercapacitor.

Stimulation was bipolar, with the electrodes placed 1.5 mm apart (surface area, 0.059 cm2), with a cycle of 5 seconds on and 5 seconds off at a frequency of 50 Hz and a pulse width of 300 μsec.

«We believe that the crumpled graphene surfaces can be used as higher surface area electrodes for battery and supercapacitor applications.

This interface impacts areas as diverse as prolonging lithium - ion battery life, designing catalytic reactions that can convert biomass to biofuels, and extracellular electron transfer in microbial communities where bacteria catalyze electrode surfaces and shuttle electrons externally, as in a microbial fuel cell.

Once we fabricate electrodes and measure their surface areas, we use a suite of characterization methods to determine unknown semiconductor properties by the following procedure: We determine the conductivity type of an unknown material by monitoring the open - circuit potential response upon illumination, which is important to establish the reverse - bias conditions used for all subsequent testing.

When used as an electrode material, it greatly increases the surface area with the same amount of material.

This capability involves 1) the development of catalytically active and corrosion resistant high surface area electrodes for photoelectrolysis 2) fine tuning the porosity of porous materials and 3) templating of porous materials to yield freestanding ALD coatings that are fully tunable in density and porosity.

In numerous tests, the researcher and his team investigated the nano - material graphene, whose extremely high specific surface area of up to 2,600 m2 / g and high electrical conductivity practically cries out for use as an electrode material.

This means that over time less and less surface area of the electrode plates is available for recharging the battery.

For this new battery, the researchers used nanowires, which are highly conductive and have a large surface area, making them great at holding charge as electrodes.

And A123 Systems, a spin - off from the Massachusetts Institute of Technology, is now promoting a new lithium battery technology which combines a novel lithium - ion phosphate chemistry with nanoscale materials that increase the surface area of the electrodes.

Today's ultracapacitors use electrodes made of activated carbon, which is extremely porous and therefore has a very large surface area.

Storage capacity in an ultracapacitor is proportional to the surface area of the electrodes.

Researchers designed the electrodes at the nanoscale to expose the greatest amount of surface area to the water.