Energy & Green Tech
Despite the growing popularity of electric vehicles, many consumers still hesitate to make the switch. One reason is that it takes so much longer to power up an electric car than it does to gas up a conventional one. But ...
Aug 22, 2022
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163
Energy & Green Tech
Scientists at the Department of Energy's Oak Ridge National Laboratory have developed a scalable, low-cost method to improve the joining of materials in solid-state batteries, resolving one of the big challenges in the commercial ...
Nov 10, 2021
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180
Energy & Green Tech
In an entirely new approach to making lithium-ion batteries lighter, safer and more efficient, scientists at Stanford University and the Department of Energy's SLAC National Accelerator Laboratory have reengineered one of ...
Oct 15, 2020
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59
Energy & Green Tech
The national transition to net-zero carbon emissions by 2050 will demand more from our electric grid than ever before. Stationary energy storage systems are critical to grid resiliency by ensuring that the power from renewable ...
Mar 25, 2022
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96
Energy & Green Tech
The boom in phones, laptops and other personal devices over the last few decades has been made possible by the lithium-ion (Li-ion) battery, but as climate change demands more powerful batteries for electric vehicles and ...
Nov 9, 2023
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71
Electronics & Semiconductors
When temperatures fall below freezing, cellphones need to be recharged frequently, and electric cars have shorter driving ranges. This is because their lithium-ion batteries' anodes get sluggish, holding less charge and draining ...
Jun 8, 2022
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127
Energy & Green Tech
A joint research team led by Professors Lee Hong-kyung, Lee Yong-min, and Lee Ho-chun of the Department of Energy Science and Engineering at Daegu Gyeongbuk Institute of Science and Technology (DGIST) has developed a new ...
Dec 15, 2022
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333
Energy & Green Tech
A novel model developed at the U.S. Department of Energy's (DOE) Argonne National Laboratory allows industry, the Department and others to gauge the impact of recycling batteries in electric vehicles. It could further energize ...
Jan 26, 2018
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47
Engineering
The pace of progress in the renewable energy sector is limited not only by the technology to capture energy from the sun, the wind, the oceans or the Earth's radiant heat, but also by the ability to effectively store and ...
Sep 8, 2021
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326
Energy & Green Tech
Green hydrogen production technology is absolutely necessary to finally realize the hydrogen economy because unlike gray hydrogen, green hydrogen does not generate large amounts of carbon dioxide in the production process.
Feb 21, 2023
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98
An ion is an atom or molecule where the total number of electrons is not equal to the total number of protons, giving it a net positive or negative electrical charge.
Since protons are positively charged and electrons are negatively charged, if there are more electrons than protons, the atom or molecule will be negatively charged. This is called an anion (pronounced /ˈænaɪən/; an-eye-on), from the Greek ἀνά (ana), meaning 'up'.
Conversely, if there are more protons than electrons, the atom or molecule will be positively charged. This is called a cation (pronounced /ˈkætaɪən/; cat-eye-on), from the Greek κατά (kata), meaning 'down'.
An ion consisting of a single atom is called a monatomic ion. If it consists of two or more atoms, it is called a polyatomic ion. Polyatomic ions containing oxygen, such as carbonate and sulfate, are called oxyanions.
When writing the chemical formula for an ion, its charge is written as a superscript '+' or '−' following a number indicating the difference between the number of protons and the number of electrons. The number is omitted if it is equal to 1. For example, the sodium cation is written as Na+, the '+' indicating that it has one less electron than it has protons. The sulfate anion is written as SO42−, the '2−' indicating that it has two more electrons than it has protons.
If an ion contains unpaired electrons, it is called a radical ion. Just like neutral radicals, radical ions are very reactive.
This text uses material from Wikipedia, licensed under CC BY-SA
