Posted on 10/06/2022 1:18:00 PM PDT by Red Badger
An electrode was manufactured by coating an ion conductive layer composed of polyethyleneimine polymer, silver, lithium salt, and carbon black on the surface of a copper current collector. The ion conductive substrate fabricated this way can operate the battery by effectively receiving and releasing lithium ions during charging and discharging. Credit: POSTECH
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The number of newly registered electric vehicles (EVs) in Korea surpassed 100,000 units last year alone. Norway is the only other country to match such numbers. The core materials that determine the battery life and charging speed of now commonly seen EVs are anode materials. Korea's domestic battery industry has been committed to finding revolutionary ways to increase the battery capacity by introducing new technologies or other anode materials. But what if we get rid of anode materials altogether?
A POSTECH research team led by Professor Soojin Park and Ph.D. candidate Sungjin Cho (Department of Chemistry) in collaboration with Professor Dong-Hwa Seo and Dr. Dong Yeon Kim (School of Energy and Chemical Engineering) at Ulsan Institute of Science and Technology (UNIST) have developed anode-free lithium batteries with performance of long battery life on a single charge.
The newly developed anode-free battery has a volumetric energy density of 977 Wh/L which is 40% higher than the conventional batteries (700 Wh/L). This means that the battery can run for 630 km on a single charge.
Batteries usually change the structure of anode materials as lithium ions flow to and from the electrode during repetitive charging and discharging. This is why the battery capacity decreases over time.
It was thought that if it was possible to charge and discharge only with a bare anode current collector without anode materials, the energy density—which determines the battery capacity—would increase. However, this method had a critical weakness which causes significant swelling of the anode volume and reduces the battery lifecycle. It swelled because there was no stable storage for lithium in the anode.
To overcome this issue, the research team succeeded in developing an anode-free battery in a commonly-used carbonate-based liquid electrolyte by adding an ion conductive substrate. The substrate not only forms an anode protective layer but also helps minimize the bulk expansion of the anode.
The study shows that the battery maintained high capacity of 4.2 mAh cm-2 and high current density of 2.1 mA cm-2 for a long period in the carbonate-based liquid electrolyte. It was also proven both in theory and through experiments that substrates can store lithium.
Further, what's drawing even more attention is that the team successfully demonstrated the solid- state half-cells by using Argyrodite-based sulfide-based solid electrolyte. It is anticipated that this battery will accelerate the commercialization of non-explosive batteries since it maintains high capacity for longer periods.
The study was recently published in Advanced Functional Materials.
Explore further
Reactive electrolyte additives improve lithium metal battery performance More information: Sungjin Cho et al, Highly Reversible Lithium Host Materials for High‐Energy‐Density Anode‐Free Lithium Metal Batteries, Advanced Functional Materials (2022). DOI: 10.1002/adfm.202208629 Journal information: Advanced Functional Materials Provided by Pohang University of Science & Technology (POSTECH)
“I stand by my original comment.”
Which was based on your ignorance of the technology.
Could, Might, Should,May. Someday.
10^11 is certainly base 10.
You are certainly a demonstration of the validity of the Dunning-Kruger Effect.
You do realize you make no sense with your non-sequiturs. Which subject that I know nothing about are you referring to?
The way you’re defending that badly written article makes me think your the illiterate who wrote it.
Economic incentive has absolutly nothing to do with the manufacturing of electric cars.. Not the common man's economics anyway.. We'll all be living in mud huts by the time they figure it all out..
” Which subject that I know nothing about are you referring to?”
The one in the OP you referred to.
“Which was based on your ignorance of the technology.”
Was based on understanding English. First it states something isn’t there, and a few words later it magically appears - with no explanation.
And if I’m ignorant of the technology, articles like that are written to supposedly educate us ignorants. That’s why I read it. With that sloppy writing all I got was confusion.
“could be a non-binary battery.”
Thats it! LOL:)
“The way you’re defending that badly written article makes me think your the illiterate who wrote it.”
Grow up.
“The one in the OP you referred to.”
You have to be more specific, what OP is that? Is it that butchered article?
And by OP what do you mean... Opinion Piece?
“Was based on understanding English. First it states something isn’t there,”
It is a technical term. Requires a basic understanding of batteries.
“You have to be more specific, what OP is that?”
A thread has only one OP.
I understand. It was just thought-provoking, the way you put it.
My car has a range of 420 miles per tank of gas.
Takes 5 minutes to fill up.
Just enough time to pee.
5.56mm
“And if I’m ignorant of the technology, articles like that are written to supposedly educate us ignorants. That’s why I read it. With that sloppy writing all I got was confusion.”
The article was not written to educate you on battery basics.
“Grow up.”
Why? I’m having too much fun teasing a sophomore like you.
I hope you appreciate all the effort I’m going through educating you in basic English. Though, I’m disappointed at how little progress you’ve made. So far you’ve proven to be a difficult pupil.
This is early in the article and gave the basics.
The newly developed anode-free battery ....
....
It was thought that if it was possible to charge and discharge only with a bare anode current collector without anode materials, the energy density—which determines the battery capacity—would increase.
Grow up.
English major? You probably think light-year refers to a unit of time.
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