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The Mobile Phone Has Saved Even More Powerful Lithium-ion Batteries
Nov 03, 2017

China's energy storage network: as we all know, lithium batteries are used in almost all the world's electronic devices, including laptops, ipads, satellites, artificial hearts and smartphones.

More recently, researchers at uniersity of Virginia in Virginia are working to improve the electrical conductivity and safety of lithium-ion batteries.

Now scientists can prevent the instability of lithium batteries caused by liquid electrolytes, said Puru Jena, a professor of physics at the university of Virginia's state university.

So, despite this instability, liquid electrolytes are still widely used in lithium-ion batteries because they have a conductive advantage over more stable solid-state electrolytes.

But a theoretical study by Jena and his colleagues, hong fang, suggests that humans may be able to design a liquid electrolyte that is not liquid, but also a solid solid electrolyte.

Their findings, which will be published in the proceedings of the national academy of sciences later this month, could lead to safer, more powerful lithium-ion batteries.

"Theoretically, in terms of stability and conductivity, maybe fish and PAWS can have both," Jena said.

As we all know, the electrolyte is the core of the battery and is the salt of the positive and negative ions.

Positive ions are atoms that have more protons than electrons, and negative ions are atoms that have more electrons than protons.

In a lithium battery, a positive lithium ion flows through an electrolyte between electrodes.

Lithium ions are free to flow through liquid electrolytes, but less liquid in solid electrolytes, which reduces the conductivity.

Therefore, in order to improve the conductivity of solid electrolyte, the researchers created a computing model, a single anion was to get rid of them, instead of negative ion clusters (anion group).

The scientists were inspired by other researchers' previous tests of solid electrolytes.

At first, the electrolyte is a known as "the perovskite oxides, one atom of oxygen and three lithium atoms form a positively charged ions, and then the positive ions and a chloride ion connection.

In the new calculation model, the chloride ion is replaced by a negative ion cluster with a boron atom and four fluorine atoms, which may improve the conductivity.

"Replacing chloride ions with ionic clusters can improve conductivity, because the clusters are larger in size and allow them to move as quickly as they do in liquids," said hong.

Currently, Jena and hong are looking for partners to test their computing models in a lab environment and eventually implement their application on lithium batteries.


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