Energy & Green Tech
(Tech Xplore)—Cell phones, laptops, and other electronic devices that have rechargeable batteries use lithium ion batteries. Lithium batteries have a high energy density. Fewer cells are needed to power a device, which ...
Energy & Green Tech
In the quest to be able to store renewable solar and wind energy on the electric grid to be used at times when the sun isn't shining and the wind isn't blowing, scientists are investigating a number of different types of ...
Nov 29, 2022
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Energy & Green Tech
Recycling of electric car batteries can be easier, cheaper, and more environmentally friendly, according to a new scientific article from Chalmers University of Technology, Sweden, which outlines an optimized recycling process. ...
Feb 21, 2022
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439
Energy & Green Tech
To support the operation of the countless electronic devices that are being developed every day, researchers will need to develop increasingly advanced battery technologies. Lithium-ion batteries (LiBs), some of the most ...
Energy & Green Tech
Materials scientists at Duke University have revealed paddlewheel-like molecular dynamics that help push sodium ions through a quickly evolving class of solid-state batteries. The insights should guide researchers in their ...
Jan 11, 2022
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112
Engineering
A new type of 3D-printed battery which uses electrodes made from vegetable starch and carbon nanotubes could provide mobile devices with a more environmentally-friendly, higher-capacity source of power.
Mar 22, 2021
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Energy & Green Tech
Researchers at Linnaeus University have developed a more environmentally friendly way of retrieving cobalt from used lithium-ion batteries. With a liquid solvent made of readily available substances, derived from urine and ...
Mar 1, 2023
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78
Energy & Green Tech
Stanford University researchers have devised a new way to make lithium-ion battery packs last longer and suffer less deterioration from fast charging.
Nov 7, 2022
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47
Energy & Green Tech
Demand for electrification of transport has emerged in recent years due to increasing concerns about global warming. The widespread adoption of electric vehicles will result in reduced harmful emissions and cleaner air, among ...
Mar 3, 2020
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117
Energy & Green Tech
Layered oxides can form the basis of high-performance materials for battery electrodes. A KAUST team has developed a cheap and simple technique that creates this crucial element for rechargeable zinc-ion cells.
Feb 28, 2018
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30
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
