Advances point the way to smaller, safer batteries
People don't ask too much from batteries: Deliver energy when it's needed and for as long as it is wanted, recharge quickly and don't burst into flames.
Mar 18, 2019
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174
Energy & Green Tech
People don't ask too much from batteries: Deliver energy when it's needed and for as long as it is wanted, recharge quickly and don't burst into flames.
Mar 18, 2019
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174
Other
John Goodenough, who shared the 2019 Nobel Prize in chemistry for his work developing the lithium-ion battery that transformed technology with rechargeable power for devices ranging from cellphones, computers, and pacemakers ...
Jun 26, 2023
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2
Energy & Green Tech
Scientists have known since the 1950s that it is theoretically possible to generate electricity through the movement of water in locations where seawater and river water meet. This type of technology is called osmotic power ...
Jul 21, 2022
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69
Consumer & Gadgets
You go to your closet each morning and you choose your shirt, trousers, dress, shoes according to your mood and style needs for the day —so why not have the same style freedom with your watch.
Electronics & Semiconductors
Rechargeable zinc metal batteries (RZMBs) could be a viable alternative to lithium ion batteries, which are currently used to power many types of electronic devices, as well as electric vehicles. Recent studies suggest that ...
Energy & Green Tech
Rechargeable batteries that use ammonium cations as charge carriers could provide ecofriendly and sustainable substitutes to metal-ion-based batteries, researchers at KAUST show.
Jan 10, 2023
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94
Engineering
Lithium metal batteries are promising battery solutions that use metallic lithium as an anode. Instead of containing electrode materials that store lithium ions, like commonly employed lithium-ion batteries (LiBs), they use ...
Energy & Green Tech
Australia's transition to renewables is gathering speed, but there's a looming problem with storage. We will need much more long-duration storage to get us through the night, once coal and fossil gas exit the system.
Apr 11, 2023
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26
Energy & Green Tech
A team of researchers designed and manufactured a new sodium-ion conductor for solid-state sodium-ion batteries that is stable when incorporated into higher-voltage oxide cathodes. This new solid electrolyte could dramatically ...
Feb 23, 2021
2
132
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
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