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Prieto introduces latest prototype of 3D Li-ion battery with 3-minute charging

Prieto Battery, a company commercializing a 3D Lithium-ion battery technology (earlier post), unveiled the most recent prototype of its patented 3D interdigitated battery that:

  • Supports a 3-minute hyper-fast full charge, with a 50% charge in 90 seconds;

  • Operates and charges in extremely low (-30 ˚C) and high (+100 ˚C) temperatures; and

  • Is Nonflammable.

All three attributes of Prieto’s lithium-ion battery were tested and validated by a third-party accredited battery testing lab, Prieto said.

Today’s batteries use a 2D architecture comprising stacked layers that must always compromise between energy storage and fast charging. In 2D batteries, energy can only flow in one direction across a two-dimensional plane. To charge, lithium ions must flow from one surface to the other, resulting in serious limitations. Thicker 2D batteries store more energy, but the long ion pathways result in slow charging. Thinner 2D batteries can charge faster but cannot store much energy.

Prieto’s 3D architecture is completely different; the 3D structure enables high electrode surface area for increased energy density with shorter ion pathways supporting fast charging.


Prieto has been issued 28 patents for its technology covering materials, architecture and manufacturing in 7 distinct patent families across the world.



In most of these 'breakthrough battery' flyers, the 'dog that did not bark' is the giveaway, ie, they don't talk about some important criteria such as energy density, cycle life or whatever, and go on endlessly about the bits they are good at.

I have not spotted a lacunae here, as far as I can see they cover all the bases, looking back at the previous linked articles and so on.

Early days, and prototype only as yet, but I have not spotted the 'gotcha'



I always think: fine, but where will you get a charger than can charge an EV with one of these.
OK, it would be easy to charge a phone or a drill (or a laser rifle!), but not a big vehicle, like a car or a truck.
E-Bike - could be a nice app.
For reference:
A diesel pump can pump 50 l/minute (0.83 / second).
A liter of diesel contains 37 Mj.
Thus you can pump ~31 Mj/sec energy with liquid hydrocarbons.
If we assume the ICE engine is 25% efficient, this is like charging at 7.75 MW for a 100% efficient EV.


Hi Jim

Where the grid is deficient for the load, then if we don't fancy diesel gen sets, which obviate the point of BEVs, then the most readily rolled out solution is fuel cells:

It ain't just Plug Power offering this solution:

And others.


@dave, I don't buy making H2 from electrolysis and then running it through a fuel cell to charge a battery EV. It is incredibly inefficient, and probably not even fast.
Better just charge straight from the grid, or use Kinetic energy storage systems to buffer this a bit.
The problem with these is that they cannot hold the energy for that long, and this one only has a 150 KW output power, so 23 minutes to 10-80 charge an 80 kWh battery, good, but not 3 minutes.
Not easy, is it.



For topping things up, efficiency is not the primary criteria.

Of course you charge the cars from the grid where that has enough power, the issue is excess loads on the local grid, so you top up, and the realistic alternatives are diesel gens and fuel cells with stored hydrogen, which is not there to replace grid power, but to supplement it.

If that is only happening for relatively little of the time and energy needed, then any loss of efficiency in the total system can be coped with as it is far, far less than the reduction in efficiency per KWh when it is needed.

And unlike diesel, local renewables can chug away topping hydrogen up, whenever power is surplus and cheap.

For areas like the American midwest, local solar etc can realistically supply hydrogen in a reasonably compact area, whereas they can't cope with the sudden extreme loads to have a fully renewable system for battery charging without hydrogen etc as an intermediary, at least for trucks, due to the very high power as against energy loads.


The copper-antimony foam anode does look expensive and heavy.

Prieto has been working in their battery since (at least) 2010. Their product always looked like some kind of exotic type of Li-ion, for special use cases.
I have not seen any mention of energy density previously.



You may have spotted the 'gotcha'


they claim:

' Prieto’s battery is designed to deliver five times the power density (20C discharge rate) and up to three times the energy density of conventional 2D batteries.'

'up to' is always tricky, and here they claim only:

'increase in VOLUMETRIC energy density'

So the specific energy could be anything, including lousy!

Well spotted!


@ mahonj:
'I don't buy making H2 from electrolysis and then running it.....'
Congrat's, I can assert your opinion to 100%; not only the total inefficiency of an H2 solution but its' high volatility is many times worse than that of CO2 when emitted to the atmosphere. It's best not to tamper with it.
I could imagine a Prieto-Battery of several Megawatts, constantly being fed from the grid, could release sufficient high power discharge to charge a 60 - 100kWh battery in a few minutes without any negative effects on the grid.


@yoat, well you don't have many options for a (say 500 KW) charger, especially if you want to charge several vehicles one after another.

If you want individual quick charging, you can use: 500 KW input line or:
Big 500 kW battery, or 500 kW kinetic energy store.
If you want to do a series of cars, you need the 500 kW line, or HUGE batteries.
(The same applies for everything down to 100 KW charging, after that it gets easier.)
Alternately, have a range extender in the vehicle (which should not be used that much; but is there to keep the battery sized to typical use, rather than extreme or theoretical use cases).


Hi Jim.
The bottom line is that it is tough to provide surge power, and efficiency suffers.

So for the currrent grid, without charging EVs, the excess load at 6pm or so, after the sun is much weaker, means that you have to have standby power, currently largely nat gas gen, and not only that, but notions that it is the most efficient GHG power are false, as for cost reasons single cycle is largely used.

Efficiency and costs are trade offs, whatever system you use.

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