Energy & Green Tech
Lithium-ion batteries, fuel cells and many other devices depend on the high mobility of ions in order to work properly. But there a large number of obstacles to such mobility. A research team led by Jennifer L. M. Rupp of ...
Mar 22, 2022
0
180
Energy & Green Tech
Scientists from Nanyang Technological University, Singapore (NTU Singapore) have devised an efficient method of recovering high-purity silicon from expired solar panels to produce lithium-ion batteries that could help meet ...
Sep 7, 2023
0
54
Energy & Green Tech
A new self-powered, wristwatch-style health monitor invented by researchers at the University of California, Irvine can keep track of a wearer's pulse and wirelessly communicate with a nearby smartphone or tablet—without ...
Jul 13, 2022
0
99
Energy & Green Tech
Lithium Ion-based batteries are among the most effective and widely used battery technologies. However, the batteries' electrolytes mainly contain organic carbonated solvents, which are considered highly flammable with a ...
Engineering
Lithium cobalt oxide is a layered metal oxide that has attracted great attention to develop rechargeable batteries. Sodium-ion batteries can store grid-scale energy due to the natural abundance of sodium. The composition ...
Engineering
Providing safer drinking water to those in need may be a little easier. According to Penn State researchers, a new desalination technique is able to remove salt from water using less energy than previous methods.
Jan 3, 2018
0
930
Electronics & Semiconductors
Magnesium batteries have long been considered a potentially safer and less expensive alternative to lithium-ion batteries, but previous versions have been severely limited in the power they delivered.
Nov 30, 2020
0
104
Energy & Green Tech
An international team, which included Skoltech researchers and their colleagues from France, the United States, and Switzerland, found out why energy losses occur during the charge-discharge cycle in lithium-ion batteries ...
Jun 21, 2022
0
172
Energy & Green Tech
Sodium, potassium and zinc have all been promising contenders for lithium's place in rechargeable batteries of the future, but researchers at Worcester Polytechnic Institute (WPI) have added an unusual and more abundant competitor ...
Aug 10, 2023
2
124
Energy & Green Tech
Solid-state batteries, currently used in small electronic devices like smart watches, have the potential to be safer and more powerful than lithium-ion batteries for things such as electric cars and storing energy from solar ...
Mar 7, 2022
0
151
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
