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Related to cathodes: Cold Cathodes, Copper cathodes


terminal through which electric current passes between metallic and nonmetallic parts of an electric circuit. In most familiar circuits current is carried by metallic conductors, but in some circuits the current passes for some distance through a nonmetallic conductor.
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 through which current leaves an electric device. In electrolysiselectrolysis
, passage of an electric current through a conducting solution or molten salt that is decomposed in the process. The Electrolytic Process

The electrolytic process requires that an electrolyte, an ionized solution or molten metallic salt, complete an
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, it is the negative electrode in the electrolytic cell.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(1) In an electron tube or a gas-discharge tube, the electrode that is the source of electrons that ensure the conductivity of interelectrode space in a vacuum or maintain the steadiness of the passage of an electric current through the gas. Depending on the mechanism of emission of electrons, there exist thermionic cathodes, photocathodes, and cold cathodes.

(2) The negatively charged electrode (pole) of a source of current (galvanic cell, storage battery).

(3) The electrode of an electrolytic cell, an electric arc, and other similar devices that are connected to the negative pole of a source of current.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


The terminal at which current leaves a primary cell or storage battery; it is negative with respect to the device, and positive with respect to the external circuit.
The primary source of electrons in an electron tube; in directly heated tubes the filament is the cathode, and in indirectly heated tubes a coated metal cathode surrounds a heater. Designated K. Also known as negative electrode.
The terminal of a semiconductor diode that is negative with respect to the other terminal when the diode is biased in the forward direction.
(physical chemistry)
The electrode at which reduction takes place in an electrochemical cell, that is, a cell through which electrons are being forced.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


1. the negative electrode in an electrolytic cell; the electrode by which electrons enter a device from an external circuit
2. the negatively charged electron source in an electronic valve
3. the positive terminal of a primary cell
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


A terminal on an electrical device that has a negative charge. Current flows from the cathode to the positively charged anode; however, the electrons actually flow from the anode to the cathode. Derived from Greek, cathode and anode mean "down" and "up" respectively. See electrode, cold cathode and OLED layers.

Cathode Emitters
In vacuum tubes, the cathodes are the emitters, and the anodes are the collectors.
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References in periodicals archive ?
However, that process involves pressurizing a hot lithium salt solution of cathode particles to around 10 atmospheres.
"Lithium-ion batteries consist of an anode and a cathode," said Xiulin Fan, a scientist at UMD and one of the lead authors of the paper.
Precursor materials are made using cobalt, nickel and manganese and the cathode is the final product after the precursors are combined with lithium.
BOx ink described earlier was immobilized onto the modified hematin/EDC-NHS air breathing cathodes were left for 4 hours at room temperature prior to being stored overnight at 4[degrees]C.
Liu, "Development of LSCF-GDC composite cathodes for low-temperature solid oxide fuel cells with thin film GDC electrolyte," International Journal of Hydrogen Energy, vol.
Particularly, the nickel-rich NCMxyz cathode materials (x [greater than or equal to] 50%) deliver high capacity such as NCM622 [8], NCM71515 [9], and NCM811 [10].
Irradiating CNT cathodes with laser pulses led to pulsed field emission.
Furthermore, ionomer content and distribution, microstructure, and porosity are essential factors in providing a fast proton transfer rate from the anode to the cathode; of course, this has to be attained without increasing the mass transfer resistance to obtain high efficiency in the electrochemical conversion.
Barnett, "Time-dependent performance changes in LSCF-infiltrated SOFC cathodes: The role of nano-particle coarsening," Solid State Ionics, vol.
The solubility of a NiO cathode in MCFC electrolyte is one of the major technical obstacles to the commercialization of such a fuel cell.
today announced that it has successfully developed a cathode material for lithium iron phosphate rechargeable batteries.
The cathode material widely used in LIBs is lithium and cobalt oxide, LiCo[O.sub.2] [1-3, 5].