Energy & Green Tech
Using salt as a key ingredient, Chinese and British researchers have designed a new type of rechargeable battery that could accelerate the shift to greener, electric transport on our roads.
Feb 1, 2021
3
186
Energy & Green Tech
The rapid development of flexible and wearable electronics is giving rise to an exciting range of applications, from smart watches and flexible displays—such as smart phones, tablets, and TV—to smart fabrics, smart glass, ...
Jan 31, 2018
0
612
Energy & Green Tech
Additive manufacturing, otherwise known as 3-D printing, can be used to manufacture porous electrodes for lithium-ion batteries—but because of the nature of the manufacturing process, the design of these 3-D printed electrodes ...
Jul 30, 2018
0
719
Engineering
Lithium metal batteries could store much more charge in a given space than today's lithium-ion batteries, and the race is on to develop them for next-gen electric vehicles, electronics and other uses.
Jan 6, 2022
0
248
Engineering
Researchers at Bristol have developed high-performance sodium and potassium ion batteries using sustainably sourced cellulose.
Jan 6, 2022
0
239
Energy & Green Tech
Today's electric cars use large lithium-ion batteries, which work fairly well. They can store a fairly high amount of energy in relation to their weight. They also don't need to be completely discharged each time before being ...
Aug 17, 2023
1
81
Energy & Green Tech
A research team led by Prof. Yi-Chun LU from the Faculty of Engineering at The Chinese University of Hong Kong (CUHK) has taken a critical step forward in improving high-energy batteries by introducing a novel electrolyte ...
May 14, 2020
0
3237
Energy & Green Tech
A sodium battery developed by researchers at The University of Texas at Austin significantly reduces fire risks from the technology, while also relying on inexpensive, abundant materials to serve as its building blocks.
Feb 29, 2024
1
87
Energy & Green Tech
Sodium—one of the elements that make up table salt—could soon make cellphone batteries much cheaper and cleaner. That's the goal of Chongwu Zhou, a professor of electrical engineering at the USC Viterbi School of Engineering.
Jun 6, 2018
1
546
Energy & Green Tech
The key materials that make up lithium-ion batteries, including manganese, nickel, and graphite, likely have sufficient supply to meet the anticipated long-term growth in demand for electric vehicles and portable electronics ...
Oct 11, 2017
1
575
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
