News tagged with cathode
New technology improves both energy capacity and charge rate in rechargeable batteries
Imagine a cellphone battery that stayed charged for more than a week and recharged in just 15 minutes. That dream battery could be closer to reality thanks to Northwestern University research.
Nov 14, 2011 |
4.8 / 5 (18) |
17
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Sulfur in hollow nanofibers overcomes challenges of lithium-ion battery design
(PhysOrg.com) -- Stanford researchers have used nanotechnology to invent a better lithium ion battery cathode.
Nanotechnology / Nanomaterials
Oct 05, 2011 |
5 / 5 (14) |
8
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Chinese team develop fuel cell that can clean water as it generates electricity
(PhysOrg.com) -- Yanbiao Liu and his colleagues from Shanghai Jiao Tong University, have succeeded in building a device capable of both cleaning wastewater and producing electricity from it. Using light as ...
Aug 19, 2011 |
4.9 / 5 (16) |
6
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A systematic way to find battery materials
Lithium-ion batteries have become a leading energy source for everything from smartphones and laptops to power tools and electric cars, and researchers around the world are actively seeking ways to nudge their performance ...
Aug 12, 2011 |
5 / 5 (5) |
0
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Rechargeable lithium-sulfur batteries get a boost from graphene
(PhysOrg.com) -- By wrapping tiny sulfur particles in graphene sheets, researchers from Stanford University have synthesized a promising cathode material for rechargeable lithium-sulfur batteries that could ...
Nanotechnology / Nanomaterials
Jul 13, 2011 |
4.2 / 5 (22) |
53
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Progress in the development of rechargeable batteries through nanotechnology
Researchers are testing different ways of improving rechargeable batteries for electric vehicles and nanotechnology plays an important role in the development. The aim is to offer batteries that have fast ...
Nanotechnology / Nanomaterials
May 31, 2011 |
5 / 5 (1) |
3
Say hello to cheaper hydrogen fuel cells: Scientists document utility of non-precious-metal catalysts
(PhysOrg.com) -- Los Alamos National Laboratory scientists have developed a way to avoid the use of expensive platinum in hydrogen fuel cells, the environmentally friendly devices that might replace current ...
Apr 21, 2011 |
4.7 / 5 (15) |
5
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Lithium-ion battery with new chemistry could power electric vehicles
(PhysOrg.com) -- While car companies race to develop electric and hybrid electric vehicles, one of the biggest challenges they face is finding a suitable energy storage system. Lithium-ion batteries, which ...
Feb 21, 2011 |
4.6 / 5 (32) |
57
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Platinum-coated nanoparticles could lead to better fuel cells
(PhysOrg.com) -- Fuel cells may power the cars of the future, but it's not enough to just make them work -- they have to be affordable. Cornell researchers have developed a novel way to synthesize a fuel cell ...
Nanotechnology / Nanomaterials
Dec 09, 2010 |
4 / 5 (7) |
0
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Nanoscale materials for high-energy density lithium-ion batteries
(PhysOrg.com) -- NEI Corporation and the University of California, San Diego won a Phase II Small Business Technology Transfer contract from NASA to develop and implement high energy density cathode materials ...
Technology / Energy & Green Tech
Aug 25, 2010 |
5 / 5 (1) |
0
A new generation of power: Hi-tech rechargeable batteries developed for military
Scientists reported progress today in using a common virus to develop improved materials for high-performance, rechargeable lithium-ion batteries that could be woven into clothing to power portable electronic ...
Technology / Energy & Green Tech
Aug 23, 2010 |
3.4 / 5 (24) |
12
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Thin films show surprising reactivity, could lead to better fuel cells
(PhysOrg.com) -- A surprising MIT laboratory finding about the behavior of a thin sheet of material -- less than a thousandth of the thickness of a human hair -- could lead to improved ways of studying the ...
Jun 24, 2010 |
4.2 / 5 (9) |
1
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Working toward the next battery breakthrough (w/ Video)
If battery-making is an art, then University at Buffalo scientist Esther Takeuchi is among its most prolific masters, with more than 140 U.S. patents, all in energy storage.
Technology / Energy & Green Tech
Jun 07, 2010 |
4.2 / 5 (12) |
1
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Chemists report promising advance in fuel-cell technology
Creating catalysts that can operate efficiently and last a long time is a big barrier to taking fuel-cell technology from the lab bench to the assembly line. The precious metal platinum has been the choice ...
May 24, 2010 |
4.6 / 5 (13) |
0
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Brookhaven Lab chemists receive patents for fuel-cell catalysts
Chemists at the U.S. Department of Energy's Brookhaven National Laboratory have received three patents for developing catalysts to accelerate chemical reactions in fuel cells. The newly patented catalysts, ...
May 20, 2010 |
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Cathode
A cathode is an electrode through which electric current flows out of a polarized electrical device. Mnemonic: CCD (Cathode Current Departs).
Cathode polarity is not always negative. Although positively charged cations always move towards the cathode (hence their name) and/or negatively charged anions move away from it, cathode polarity depends on the device type, and can even vary according to the operating mode. In a device which consumes power, the cathode is negative, and in a device which provides power, the cathode is positive:
An electrode through which current flows the other way (into the device) is termed an anode.
For more information about Cathode, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
