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
0
98
Energy & Green Tech
(Phys.org)—Instant crowd pleaser: Any headline that promises more battery life for smartphones. And why wouldn't it be a crowd-pleaser, considering the hassles in running out of juice when you need it the most?
Engineering
University of Maryland researchers studying how lithium batteries fail have developed a new technology that could enable next-generation electric vehicles (EVs) and other devices that are less prone to battery fires while ...
Oct 26, 2023
0
24
Energy & Green Tech
How many rechargeable lithium-ion batteries are you wearing? How many are in your general vicinity?
Dec 12, 2022
0
88
Energy & Green Tech
Just about everyone has endured the frustration of their cell phone running out of power before they get a chance to recharge, and although electric cars are growing in popularity, they remain limited by how far they can ...
Aug 6, 2020
1
125
Energy & Green Tech
The number of times batteries may be recharged could double in the near future thanks to scientific advances in sulfur battery technology being made by University of Adelaide researchers.
Dec 13, 2021
0
127
Electronics & Semiconductors
A crucial but poorly-studied parameter that dictates battery performance is the migration barrier. It determines the rate at which ions move through an electrode inside the battery, and ultimately the rate at which it charges ...
Jul 25, 2022
0
240
Engineering
As current courses through a battery, its materials erode over time. Mechanical influences such as stress and strain affect this trajectory, although their impacts on battery efficacy and longevity are not fully understood.
Oct 4, 2023
0
152
Energy & Green Tech
Solid-state batteries could play a key role in electric vehicles, promising faster charging, greater range and longer lifespan than conventional lithium-ion batteries. But current manufacturing and materials processing techniques ...
Sep 7, 2022
0
193
Energy & Green Tech
A technique based on the principles of MRI has allowed researchers to observe not only how next-generation batteries for large-scale energy storage work, but also how they fail, which will assist in the development of strategies ...
Mar 2, 2020
0
87
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
