Featured Solid-state battery wars

So far QuantumScope has done small prototypes. They have to scale up with multiple layers to have sufficient capacity for an EV. They express confidence that they can do this but they are clear that they haven't done it yet and there may be delays. So their batteries are potentially suitable for EVs.

 

Samsung Presents Groundbreaking All-Solid-State Battery Technology to ‘Nature Energy’ – Samsung Global Newsroom

"This promising research is expected to help drive the expansion of electric vehicles (EVs). The prototype pouch cell that the team developed would enable an EV to travel up to 800km on a single charge, and features a cycle life of over 1,000 charges."

 

And yet, they directly contradicted both of your claims - that it's not suitable for EVs and that it has poor cycle life.

 

When someone starts shouting "Fake News!" it's usually because they can't otherwise discredit a source. I suggest that you quote the specific claims in the article submitted by Samsung and the science that contradicts it. The only corrections that the peer review came up (Mar 20, 2020) with was a slight change in a written formula. I was not inclined to spend $$$ to read the article. The abstract seemed clear enough.

Exactly what are you complaining about?
Do you dispute that they expect more than 1000 cycles?
Are you claiming that they can't reach 900Wh/L ?

I don't care if it's company propaganda if the main points are valid.

 

Has QuantumScape published anything in a peer reviewed journal?

 

"This statistic shows the top 20 publishers of solid-state battery patents in the U.S. between 2010 and 2019 and the number of patents that were published during this time period. Toyota was the most active in the U.S. for solid-state battery technologies with 203 patents published. That is 5.8 times as many as the next highest number of patents."

https://www.statista.com/statistics/1008044/us-solid-state-battery-patents-by-organization

 

The paper has portions that contradict both of your statements:

"The cell consisted of ten parallel stacks of the bi-cells and was operated under a 0.05 C (0.34 mA cm−2)/0.05 C (0.34 mA cm−2) charge/discharge rate without external pressure. Notably, we were able to obtain a discharge capacity of 5,870 mAh and a high energy density of 942 Wh l−1 at 100% SOC with this stacked cell."

"The discharge capacity at 45 °C (99.5%) was comparable to that attained at 60 °C, and the discharge capacity at 25 °C decreased to 90.7%. Encouragingly, more than 40% of the capacity was still exhibited at −10 °C. We believe that the low-temperature performance of the ASSBs can be further improved by further lowering the interfacial resistance and increasing the ion conductivity of the solid electrolyte."

 

If they have patents, their secrets would be protected.

 

If only that were true. But it's not true in reality.

 

I have 5C charge/40C discharge lithium-ion batteries in my house. But they are under 180Wh/kg. Solid State holds the promise of shifting that tradeoff out - you could have both high energy and high rates at the same time. This one seems to show high energy (higher than high-energy Lithium-Ion) but not high rates, yet.

As I've said over and over, current batteries suck. If they didn't, we'd all be buying EVs for almost every application.

 

https://patents.justia.com/assignee/quantumscape-corporation contains many pages of patent brief descriptions. Some as recent as January 2021.

 

Not quite sure why this thread is called battery "Wars". If you have a bunch of Nations trying to build cannons, is that what we call a war now?
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