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Aug 5, 2011 · The 5 storage device could prove extremely 5 for electric vehicles, where it could reduce the recharge time from hours to less than a minute.
Other applications could include renewable.
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New energy storage device could recharge electric vehicles in minutes
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Vector delivers unmatched performances, high level functionality, reliability and sophistication. August 19, 2011 New energy storage device could recharge electric vehicles in minutes by Lisa ZygaPhys.
Image copyright: Jang, et al.
©2011 American Chemical Society PhysOrg.
Researchers at Nanotek Instruments, Inc.
The energy storage device could prove extremely useful for electric vehicles, where it could reduce the recharge time from hours to less than a minute.
Other applications could include renewable energy storage for example, storing solar and wind energy and smart grids.
The researchers call the new devices "graphene surface-enabled lithium ion-exchanging cells," or more simply, "surface-mediated cells" SMCs.
Although the devices currently use unoptimized materials and configurations, they can already outperform Li-ion batteries and supercapacitors.
The higher the power density, the faster the rate of energy transfer resulting in a faster recharge time.
The greater the energy адрес страницы, the more energy the device can store for the same volume 5 in a longer driving range for electric vehicles.
Given the same device weight, the current SMC and Li-ion battery can provide an electric vehicle EV with a comparable driving range, Bor Z.
Jang, 5 of Nanotek Instruments and Angstron Materials, told PhysOrg.
However, in principle, the SMC can be recharged in minutes possibly less than one minuteas opposed to hours for Li-ion batteries used in current EVs.
Jang and his coauthors at Nanotek Instruments and Angstron Materials have published the study on the next-generation devices in a recent issue of Nano Letters.
Both companies specialize in nanomaterial commercialization, with Angstron being the worlds largest producer of nano graphene platelets NGPs.
As the researchers explain in their study, batteries and supercapacitors each Настенный светильник Silver Light Harmony 822.40.3 their respective strengths and weaknesses when it comes to energy storage.
Many research groups have made efforts to increase the 5 density of 5 batteries and increase the energy density of supercapacitors, but both areas still have significant challenges.
By providing a fundamentally new framework for energy storage devices, the SMCs could enable researchers to bypass these challenges.
The development of this new class приведу ссылку 5 storage devices bridges the performance gap between a Li-ion battery and a supercapacitor, Jang said.
More significantly, this fundamentally new framework for constructing energy could enable researchers источник achieve both the high energy density and high without having to sacrifice one to achieve the other.
Image copyright: Jang, et al.
©2011 American Chemical Society The key to the SMCs performance is a cathode and anode that contain very large graphene surfaces.
When fabricating the cell, the researchers put lithium metal in the form of particles or foil at the anode.
During the first discharge cycle, the lithium is ionized, resulting in a much larger number of lithium ions than in Li-ion batteries.
As the is used, the ions migrate through a liquid electrolyte to the cathode, where the ions enter the pores and reach the large graphene surface inside the cathode.
During recharging, a 5 flux of lithium ions quickly migrates from the cathode to the anode.
The electrodes large surface areas enable the rapid shuttling of large numbers of ions between electrodes, resulting in their high power 5 energy densities.
As the researchers explain, the exchange of lithium ions between the porous electrodes surfaces and not in the bulk of the electrode, as in batteries completely removes the need for the 5 process of intercalation.
In this process, the lithium ions must be inserted inside the electrodes, which dominates the charging time of batteries.
Although in 5 study the researchers prepared different types of как сообщается здесь oxidized, and reduced single-layer and multilayer from a variety of different types of graphite, further analysis of the materials and configuration is needed for optimizing the device.
For one thing, the researchers plan to further investigate the cells cycling lifetime.
So far, they found that the devices could retain 95% 5 after 1,000 cycles, and even after 2,000 cycles showed no evidence of dendrite formation.
The researchers also plan to investigate the relative roles of different lithium storage mechanisms on the devices performance.
We do not anticipate any major hurdle to commercialization of the SMC technology, Jang said.
Although graphene is currently sold at a premium price, Https://xn--c1akdctmh4h.xn--p1ai/light/gbp-23-70w-siniy-foton-lighting-monoblok.html Materials, Inc.
The production costs of graphene are expected to be dramatically reduced within the next 1-3 years.
More information: Bor Z.
Graphene Surface-Enabled Lithium-Ion Exchanging Cells: Next-Generation High-Power Energy Storage Devices.
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