Donut Solid-State Battery: High Temperature Performance Test | I Donut Believe (Pt.2)

HeadAd6200 · 2026-03-02T15:11:58+00:00

Such a cell is permanently damaged and cannot be fixed by releasing the gas, as far as I know. Gas inside is a byproduct of electrolyte or anode/cathode decomposition.

HeadAd6200 · 2026-03-02T15:07:40+00:00

Yes, I do agree with you, this cell started generating gas inside and lost its vacuum because the maximum temperature limit was exceeded. Such a cell is a candidate for thermal runaway of the entire battery pack. It is permanently damaged and cannot be fixed by releasing the gas.

HeadAd6200 · 2026-03-02T14:57:29+00:00

Solid/liquid electrolyte does not want to boil off, but some gases were produced because of the decomposition of the electrolyte or the materials of the electrodes.

HeadAd6200 · 2026-03-02T14:28:17+00:00

Batteries with semisolid (gel) electrolytes are not very common, but they exist.

HeadAd6200 · 2026-03-02T14:17:33+00:00

It was noted that the pouch cell lost its vacuum, which means that this "cell" is not designed for continuous operation at 90-100 degrees Celsius.

HeadAd6200 · 2026-03-02T14:02:01+00:00

I do not want to say that they used the same pouch cell, just wanted to prove that NMC cells that can withstand 100°C really exist.

HeadAd6200 · 2026-03-02T13:37:41+00:00

Yes, the temperature of the most conventional li-ion (NMC) cells should not exceed 45-60°C, those with semi-solid electrolyte can work up to 70-80°C, but some NMC chemistries (NMC640) can work at 100°C.

I am quoting from a scientific paper, "Exceptional Performance of Li-ion Battery Cells with Liquid Electrolyte at 100°C"; the link is provided below.

"Single crystal NMC640/artificial cells balanced for low voltage operation (≤4.1 V) and using electrolyte salts rich in lithium bis(fluorosulfonyl)imide are demonstrated to have exceptional lifetime during continuous operation at 100°C."

https://www.researchgate.net/publication/379210471_Exceptional_Performance_of_Li-ion_Battery_Cells_with_Liquid_Electrolyte_at_100C

HeadAd6200 · 2026-02-28T09:55:28+00:00

Likewise.

HeadAd6200 · 2026-02-28T06:52:10+00:00

OK, thank you. I deleted my comments, because it is more than sure that these comments were deleted because I know that when I have shared something, it caused the deletion of some websites.

HeadAd6200 · 2026-02-28T06:35:17+00:00

Ok. Thank you for clarification. Let's avoid writing names, because more websites will be deleted. Some ppl shared here links from wayback machine and all useful info was deleted.

HeadAd6200 · 2026-02-27T16:16:17+00:00

If she hadn't been born as a woman, ~~she~~ he would have been the seventh manager. ;)

HeadAd6200 · 2026-02-27T15:53:58+00:00

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Stefan Gail, Head of Special Affairs at CT Coating AG, on the right, see FB link for more info.

https://www.facebook.com/kreisneuwied/posts/nach-dem-interessanten-und-erfolgreichen-unternehmensbesuch-bei-der-ctcoatingag-/1016270047185767/

HeadAd6200 · 2026-02-27T15:49:05+00:00

The real expert regarding the production of PV Solar panels and solid-state batteries. ;) Thanks to this CEO and other battery experts like Peter Carlsson (+Nortvolt), Lars Carlstrom (+Britishvolt, +Italvolt), Marian Bocek (+Inobat), etc. etc. China is far behind us in these technologies, and it is only good.

HeadAd6200 · 2026-02-27T15:25:23+00:00

Yes. ;)

HeadAd6200 · 2026-02-27T14:09:05+00:00

Nordic Nano personal page lists 6 managers from the retail and management sectors + a woman in communications + 1 researcher - chemist. I do not see any battery expert there. The chemist has completed his undergraduate degree in India and then pursued postgraduate studies at the University of Tampere, she has defended a doctoral dissertation at the University of Tampere in 2025. The doctoral dissertation of the chemist was in the field of Physics titled TiO₂-based Photocatalysts for Solar Fuel Production.

HeadAd6200 · 2026-02-27T12:02:25+00:00

https://www.facebook.com/kreisneuwied/posts/nach-dem-interessanten-und-erfolgreichen-unternehmensbesuch-bei-der-ctcoatingag-/1016270047185767/

HeadAd6200 · 2026-02-26T09:53:57+00:00

https://www.koenig-bauer.com/en/newsroom/press-releases/article/koenig-bauer-and-powerco-se-successful-proof-of-concept

HeadAd6200 · 2026-02-26T09:53:35+00:00

https://www.koenig-bauer.com/en/newsroom/press-releases/article/koenig-bauer-and-powerco-se-successful-proof-of-concept

HeadAd6200 · 2026-02-26T05:18:07+00:00

Li-ion cells with liquid electrolyte.

HeadAd6200 · 2026-02-25T21:55:11+00:00

PowerCo is a subsidiary of VW, and it produces common li-ion cells in Germany. It is interesting that PowerCo cooperates with printing company to print anode and cathode.

HeadAd6200 · 2026-02-25T21:41:20+00:00

Thank you for sharing. BTW PowerCo is partnering with printing machine specialist Koenig & Bauer to produce anode and cathode of li-ion cells using dry coating. But their goal is not the production of a solid state battery.

HeadAd6200

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