Energy & Green Tech
Researchers at Swansea University, in collaboration with Wuhan University of Technology, Shenzhen University, have developed a pioneering technique for producing large-scale graphene current collectors.
Aug 29, 2024
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64
Machine learning & AI
A research team has demonstrated that analog hardware using ECRAM devices can maximize the computational performance of artificial intelligence, showcasing its potential for commercialization. Their research has been published ...
Aug 1, 2024
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30
Energy & Green Tech
Researchers from Germany, Italy, and the UK have achieved a major advance in the development of materials suitable for on-chip energy harvesting. By composing an alloy made of silicon, germanium and tin, they were able to ...
Jul 8, 2024
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103
Engineering
Thermoelectric technology, which enables the direct conversion of heat into electricity, has emerged as a promising alternative energy source. Notably, this technology can efficiently convert body heat into electrical energy, ...
Jun 12, 2024
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18
Engineering
Most people do not give the U.S. electric grid a second thought—we flip a switch, and the lights come on. Behind the scenes are thousands of power plants and utilities linked by millions of miles of transmission lines. ...
Apr 16, 2024
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57
Engineering
Controlling heat flow is key to enhancing performance in a wide variety of systems. In electronic devices, such as mobile phones or any type of processor, overheating decreases their performance and reduces their lifetime. ...
Apr 11, 2024
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54
Energy & Green Tech
Oxide ion conductors used in solid-state fuel cells often fail to reach full potential when operating at temperatures below 500 oC, but researchers from Tokyo Tech have recently found a solution to this problem. They demonstrated ...
Apr 10, 2024
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10
Energy & Green Tech
Scientists have discovered a stable and highly conductive lithium-ion conductor for use as solid electrolytes for solid-state lithium-ion batteries.
Apr 2, 2024
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71
Engineering
Without a map, it can be just about impossible to know not just where you are, but where you're going, and that's especially true when it comes to materials properties.
Mar 29, 2024
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27
Energy & Green Tech
Zinc-air batteries are an inexpensive, powerful battery alternative that can be used on a small scale to power electronics or on a large scale for electric vehicles or energy storage. These batteries work when oxygen from ...
Feb 27, 2024
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4
Electrical conductivity or specific conductance is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density to the electric field strength :
It is also possible to have materials in which the conductivity is anisotropic, in which case σ is a 3×3 matrix (or more technically a rank-2 tensor) which is generally symmetric.
Conductivity is the reciprocal (inverse) of electrical resistivity, ρ, and has the SI units of siemens per metre (S·m-1):
Electrical conductivity is commonly represented by the Greek letter σ, but κ (esp. in electrical engineering science) or γ are also occasionally used.
An EC meter is normally used to measure conductivity in a solution.
This text uses material from Wikipedia, licensed under CC BY-SA
