Posted on 03/07/2025 1:22:42 PM PST by Red Badger
Korean researchers have developed advanced Ni-rich cathodes that improve all-solid-state battery performance, offering longer lifespans and greater energy efficiency.
n an era where electronic devices and electric vehicles demand better battery performance, scientists are racing to develop batteries that last longer, charge faster, and store more energy.
A promising solution lies in all-solid-state batteries (ASSBs), which could outperform traditional lithium-ion batteries in both efficiency and safety.
At the heart of this innovation is the cathode active material (CAM), particularly those rich in nickel (Ni), which plays a crucial role in boosting battery performance.
Role of Ni-rich cathodes ASSBs differ from conventional lithium-ion batteries by using solid electrolytes instead of liquid ones, reducing the risk of fire and improving energy storage capacity.
However, the performance of these batteries heavily depends on the effectiveness of their cathodes. Researchers have been focusing on Ni-rich cathodes because of their potential to significantly boost energy density. Yet, despite their advantages, these cathodes have shown certain limitations that affect battery longevity.
“ASSBs comprising Ni-rich layered cathode active materials (CAMs) and sulfide solid electrolytes are promising candidates for next-generation batteries with high energy densities and safety,” wrote Nam-Yung Park, Han-Uk Lee, and their colleagues in their paper.
“However, severe capacity fading occurs due to surface degradation at the CAM–electrolyte interface and severe lattice volume changes in the CAM, resulting in inner-particle isolation and detachment of the CAM from the electrolyte.”
Challenges and breakthroughs in Ni-rich cathode design A major challenge with Ni-rich cathodes is capacity fading, which occurs when batteries lose their ability to hold a charge over time.
This degradation is primarily caused by chemical reactions at the cathode-electrolyte interface and structural changes in the cathode itself. The expansion and contraction of cathode particles during charging cycles lead to material breakdown, reducing battery efficiency.
To better understand these issues, researchers at Hanyang University in South Korea conducted a study examining how different levels of nickel in the cathode impact degradation.
They synthesized four different types of Ni-rich cathodes, with nickel content ranging from 80% to 95%, and analyzed their effects on battery performance.
“We quantified the capacity fading factors of Ni-rich Li[NixCoyAl1−x−y]O2 composite ASSB cathodes as functions of Ni content,” wrote Park, Lee, and their colleagues. “Surface degradation at the CAM–electrolyte interface was found to be the main cause of capacity fading in a CAM with 80% Ni content, whereas inner-particle isolation and detachment of the CAM from the electrolyte play a substantial role as the Ni content increases to 85% or more.”
Advancing Ni-rich cathode performance The study found that surface degradation was the primary issue for cathodes with 80% nickel, while higher nickel content (85% or more) led to particle isolation and detachment, further reducing battery efficiency. Using this knowledge, the researchers developed a modified Ni-rich cathode with an optimized surface and structure. These cathodes featured a columnar design, which significantly reduced particle detachment and improved overall stability.
When tested in a pouch-type full cell with a C/Ag anode-less electrode, the newly designed cathodes retained 80.2% of their initial capacity after 300 charge cycles. This marks a significant step toward improving ASSBs, making them more reliable and suitable for widespread adoption.
By refining Ni-rich cathodes, researchers are paving the way for high-performance, long-lasting, and safer all-solid-state batteries. This breakthrough could revolutionize energy storage, driving advancements in electronic devices, electric vehicles, and other battery-powered applications.
Lithium Titanium cells do 20,000 cycles to 80% today at 100% depth of discharge. There is a company in Australia that warranties their cell packs for 20 years and says they will do 60,000 cycles till end of life. Those cells are being used for off grid solar homes and microgrids in the outback where there are no power lines at all its the outback after all..
There is no less than two aluminum cell technology that also do 10000+ cycles the one I posted only lost 1% not 20 in those 10000 cycles they expect the cells to do 100000+ cycles before they declare them end of life.
Sodium ion has two techs that do 20000 and 50000 cycles with the 50,000 Prussian blue cells already in commercial production for grid level use here in the USA. When not if they make a small scale 50kWh pack I’m buying one or two for my off grid set up in Johnson City at the family compound.
Nickel is interesting research but there is better tech already in commercial use.
I have two EVs they are the best vehicles I own. I also have a Expedition, a F250 and a S60 Volvo ,plus two sport bikes and a Polaris SXB in the stable.
What do I drive most my Model 3 LR, the wife takes the Y now most places, why three letters FSD. There is no tech better than Tesla’s for automated and semiautomated driving. I go hands off from my driveway to the exit in Shreveport all the time now to the casinos there. My model 3 charges off the panels above or so does the Y. I can flip a breaker and tell ERCOT and the grid to shove it. During the black out when all the service stations were stone cold dark w/o a single gallon of fuel dispensed I let two of my friends come and charge off my panels four EVs fully charged in the middle of a blackout so it’s a myth of the grid goes down EVs are toast. My cars and friends were the only ones filled up during that time exactly opposite what the luddites skree about. I also had heat and a party with BBQ and beer kegs we made a good time of it. Why because at the time my 15,000 watt system made power every time the sun rose even under clouds of makes some power I have never seen it at zero while there was at least partial sun.
No one has a oil well, fractional refinery in their back forty let alone back yard. But I do have panels that fuel my EV every day on site ,and you cannot turn off the sun it is that simple. I will always have a 400 mile one way range regardless what happens to the grid, the oil industry or gas stations that also means a 200 mile.radius of.movement not dependant on any one or any system other than the sun being up. That’s priceless to a prepper. Plus well water and goats for emergency food production...sorry frick and frack your kids are food not pets.
The more you drive, the less you can drive.
“scientists are RACING to develop batteries that last longer, charge faster, and store more energy.”
ROTLOL!
gotta be the slowest race in history ...
Curious- you have solar to refresh that planned 50-100kWh pack?
I’ve long since lost count. How many battery breakthroughs now? Can we still even call them batteries?
“How plentiful is nickel vs lithium?”
Nickel is a dime a dozen.
If I had a nickel for every time there was a nickel breakthrough in EV batteries, I would have a nickel.
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I have currently three 15kw roof mounted , both houses and the steel building
I already sell power to ERCOT via a LLC and a group of other small solar system owners as a virtual power entity so yeah I have plenty of capacity or could purchase wholesale power very cheaply from my group or the wholesale market directly.
I get panels at wholesale price and have a friend and former graduate student of mine who is a solar installer do the installs and all the way to the separate grid breaker where my cousin who is a licensed electrician makes the required legal splice it’s ridiculous but you have to get a licences electrician to do the last wires. The systems started as an off grid experiment and grew and grew as more were added and profit was used to expand. It’s self sustaining now.
45 kW should do the trick.
Nice setup.
When we put ourselves on our residence, GA restricted systems to 10 kW max for grid-tied systems.
Since changed, but our needs are met.
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