Double density achieved?

[RLXXI]

This looks very promising if true.
https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202515906

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[Timeless Epoch]

Very interesting, but it seems they have a lot of work to do yet.

pouch cells using RH-DEL displayed outstanding cycle stability, achieving capacity retentions of 89.6% after 30 cycles and 73.9% after 80 cycles

 

[chl]

Some background, as I understand it:

LMBs (Lithium Metal Batteries) in general have been seen as promising due to their high energy density potential, but a drawback has been their cycle lifespan. Traditionally they use a solid lithium anode.

A recent paper from CATL was mentioned in this news release:

... CATL are saying they have a major breakthrough in Lithium Metal Batteries...They tracked the evolution of active lithium and each electrolyte component throughout the battery’s life cycle and found that the dominant cause of cell failure is not:

• solvent breakdown
• dead lithium accumulation
• solvation environment disruption

The cause of failure was the continuous consumption of the electrolyte salt LiFSI, with 71% of it consumed by end of life....

https://www.batterydesign.net/chemistry/lithium-metal-battery/

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Anode free LMBs replace the "traditional" solid lithium anode with a bare copper foil (or other bare current conductor) and then lithium gets deposited on this copper foil during the first charging creating a lithium metal anode layer. During discharging the lithium gets stripped from the copper foil. So the copper foil is alternately coated and stripped repeatedly during charge/discharge cycling.

One problem with this type of LMB is the formation of dendrites which can lead to short circuits and cell failures. That is the limitation that this referenced paper is aimed at overcoming.

As mentioned above, and in the conclusion of the paper, they achieved some promising results, but there is more work to be done based on the pathway their research suggests.
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Anode-Free Lithium Metal Batteries (AFLMBs) use a solid electrolyte and so are a type of Solid State Battery (SSB).

This is cutting edge tech. SSBs are expected in EVs as soon as 2027 according to news reports.

Time will tell.

 

[chriserx]

Progress is progress but 82% capacity at 100 cycles seems low. I skimmed it as I don't know enough chemistry to understand more than the basic concepts of the research, but I didn't see anything about the capacity stabilizing. The cell charge rate also seemed to be on the low side. I'm all for supporting the work, and doubly so for not locking the research behind a paywall but we still have a way to go.

 

[vvgogh]

The Lightning ER 143 kWh battery would weigh 412.5 kg (907 lbs) and occupy 112.5 L (4 cu ft) with these cells, plus the thermal management system. On the down side, after 100 recharges spanning 2y and 30,000 miles, you'll have a 116 kWh battery with 250 mile highway range and no more buffer left.

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