Energy & Green Tech
Lithium-sulphur batteries, which are lighter and cheaper than today's models, may be the next generation of power cells that we use in electric cars or mobile phones—if scientists can get them to last for longer.
Jun 5, 2020
0
38
Energy & Green Tech
A multi-institution team of scientists led by Texas A&M University chemist Sarbajit Banerjee has discovered an exceptional metal-oxide magnesium battery cathode material, moving researchers one step closer to delivering batteries ...
Feb 5, 2018
2
288
Engineering
The introduction of lithium-ion (Li-ion) batteries has revolutionized technology as a whole, leading to major advances in consumer goods across nearly all sectors. Battery-powered devices have become ubiquitous across the ...
May 6, 2021
2
471
Energy & Green Tech
Lithium-based batteries use more than 50 percent of all cobalt produced in the world. These batteries are in your cell phone, laptop and maybe even your car. About 50 percent of the world's cobalt comes from the Congo, where ...
Apr 11, 2018
0
76
Energy & Green Tech
Researchers at MIT say they have created a new material that will pave the way to faster charging batteries.
Electronics & Semiconductors
A research team consisting of the National Institute for Materials Science (NIMS) and the Tokyo University of Science has developed the fastest electric double layer transistor using a highly ion-conductive ceramic thin film ...
Aug 3, 2023
0
78
Energy & Green Tech
Researchers around the world are on a mission to relieve a bottleneck in the clean energy revolution: batteries. From electric vehicles to renewable grid-scale energy storage, batteries are at the heart of society's most ...
Dec 5, 2022
0
167
Energy & Green Tech
Many owners of electric vehicles worry about how effective their battery will be in very cold weather. Now a new battery chemistry may have solved that problem.
May 17, 2023
0
165
Energy & Green Tech
In a breakthrough, researchers at the Indian Institute of Science (IISc) and their collaborators have discovered how next-generation solid-state batteries fail and devised a novel strategy to make these batteries last longer ...
Jun 2, 2022
0
324
Electronics & Semiconductors
Sweat, like blood, can tell us a lot about a person's health. And conveniently, it's a lot less invasive to collect. This is the premise behind the wearable sweat sensors developed by Wei Gao, assistant professor of medical ...
Jul 20, 2023
0
86
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
