But how long? Longer than 300 miles?
But sometimes they do.
> Lithium nickel manganese cobalt oxides (abbreviated Li-NMC, LNMC, or NMC) are mixed metal oxides of lithium, nickel, manganese and cobalt. They have the general formula LiNixMnyCozO2. ... NMCs are among the most important storage materials for lithium ions in lithium ion batteries. They are used on the positive side, which acts as the cathode during discharge.
[0] https://www.amazon.com/Powerhouse-America-China-Great-Batter...
99 out of every 100 ideas they come up with are complete rubbish, but the 100th tends to be an absolute humdinger.
Frame it wisely and wittily enough for fast food. Feed it back to those smart people.
That's Terry.
Shit on them. Imply there was nothing impressive about what they did and it wasn't worth doing.
That's HN.
As opposed to the miracle of selection elsewhere.
It basically never happens that a new cell chemistry becomes the market leader in all areas, but all in all, batteries to get better and cheaper at a remarkable rate.
The team established that this shortcoming is not the case for their new battery design by building and operating a test cell for 1000 cycles, demonstrating its stability over repeated charge and discharge.
> This new solid enables chemical reactions that produce lithium oxide (Li2O) on discharge.
Lithium has an atomic mass of 7 and Oxygen of 16. The reaction starts with only Lithium (2 atoms = 14 mass) and ends with Li2O, with a mass of 30.
that would be fine!
That would add an interesting dynamic during a race!
Not in Europe, a lot of US cars already wouldn't fit in EU parking spots (most are 5mx2.3m)
1. how fast can you charge it
2. how much power can it output?
3. how long does it last time wise, not just cycle wise
4. how much does it cost
5. how much space does it take up
6. what temperature ranges can it handle?
7. can it handle vibrations
just a few
All these parameters do is help determine its best possible use-case for product and if it something to compete against incumbents or open up other market possibilities.
From the article: "The main new component in this lithium-air battery is a solid electrolyte instead of the usual liquid variety. Batteries with solid electrolytes are not subject to the safety issue with the liquid electrolytes used in lithium-ion and other battery types, which can overheat and catch fire."
Something doesn't add up.
But the catch is two-fold. First, are they weighing the battery before or after discharging? Oxidizing will change the weight significantly. The most honest result would be the average weight during the cycle.
The other catch with these air batteries is usually the purity requirements on the intake. I recall reading about earlier experiments that could not tolerate pollen, dust, and smog, and required an energy intensive purification step (maybe involving cryogenics) that was a nontrivial power draw.
Those caveats aside, a back of the envelope estimate for the energy density would be something like 600-700 Wh/kg.
https://www.google.com/search?q=current+tesla+battery+energy... says Tesla batteries are currently in the range of 270-290Wh/kg
Is that accurate to you?
As in this is roughly at least twice as good as current technology? Seems too good to be true. When can we expect to see it hit consumer cars? 5 years? 10 years?
1st gen: 276 Wh/kg (2022)
2nd gen: 305 Wh/kg (2023)
3rd gen: 333 Wh/kg (2024)[1]
Here is a cool article on all the tech that is scheduled or went into these new 4680 batteries and getting the energy density up well past 300.
https://cleantechnica.com/2020/09/22/everything-you-need-to-...
[1]https://insideevs.com/news/598656/tesla-4680-battery-cell-sp...
https://insideevs.com/news/600297/tesla-model-y-4680-is-just...
And of course, they will release oxygen if you try to charge them, which implies a way of rapidly expelling air when charging up quickly. Many past attempts avoid this problem by "mechanically" charge up the battery, meaning literally swapping out the spent chemicals with new ones. This of course require an auxiliary battery if you want regenerative braking or the ability to electrically charge.
And of course, the real catch is that we've already invented the metal-air battery in a practical way: hydrogen fuel cells. The big advantage with them is that mechanically recharging is very straightforward compared to other mechanisms. All other attempts are basically reinventing the wheel or have a very specific niche in mind.
Putting the same weight of this into a Tesla Model Y would easily give over 1200 miles of range