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Vertically aligned carbon nanotubes triple the density of lithium batteries

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31–40 of 163 posts

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#31
post #30

Battery noob here: Will this achieve the energy density of fossil fuels? In other words, a 50 litre tank of petrol gets me around 500 km. What will a similar volume of these batteries get me?

No, current batteries have about 1 percent the energy density of gasoline.

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#32
post #30

Battery noob here: Will this achieve the energy density of fossil fuels? In other words, a 50 litre tank of petrol gets me around 500 km. What will a similar volume of these batteries get me?

Not even close, but that's not so bad. ICEs will probably always have their place but most people can go without, especially in Europe (Americans are very loud about how they need to drive 3000 miles to work everyday so I won't bother arguing that)

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#33

Articles like this is why I want a service which lets you "bookmark" the article and have it tell you whether it panned out a few years later. There's not much you can do here other than Defer Judgement yet again, at which point you'll have forgotten about it anyway.

What you want is a piece of paper and google, no?

I'm not being facetious, I find a piece of paper pinned proudly on my wall catches my eye better than yet more crap on my PC and/or phone.

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#34

Actually good article if you continue reading. Comment from an independent expert: "Research has shown vertically aligned – or even just well distributed – carbon nanotubes have far greater properties than randomly placed carbon nanotubes," said Dr. Shearer. "I am not surprised a x10 in conductivity is possible. Controlling the placement of carbon nanotubes is really the way to unlock their potential. The issue in co…

Given that presumably Tesla's goal is to take battery costs down by 56% in 3 years from (108 - 140 $/kwh) to (50 - 70$/kwh) and widely held consensus is that 100$/kwh is the price point at which EVs are no brainer on upfront costs with ICE cars, i feel that there is a long way to go. However, i think any successful real world demo starting with niche applications will help. We need all the battery tech to succeed.

Electric airplanes need significantly better energy density.

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#35
post #6

IF this is true, it would be a massive breakthrough. Truly monumental. Hence, I am skeptical. But otherwise, this would be a massive thing. a 2x capacity per weight advantage of batteries? Without an increase in space? That comes down to doubling the range of EVs, and making electric planes and rockets a lot more viable. A 3x capacity per space advantage means roughly a 3x improvement in your phone and laptop battery…

>Or, more likely, a slight improvement in your phone and much thinner phones. On laptops, we might see the return of more ports. //

Please, no. I don't understand the utility of making something so expensive be so fragile and hard to hold. My phone is 5mm thick, that's already too thin for me.

Does anyone want thinner phones or is it just a marketing thing?

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#36
post #31
post #30

Battery noob here: Will this achieve the energy density of fossil fuels? In other words, a 50 litre tank of petrol gets me around 500 km. What will a similar volume of these batteries get me?

No, current batteries have about 1 percent the energy density of gasoline.

Note that most of the energy in gasoline gets wasted as heat in a car, only a part gets used in winter to heat the cabin. So there's a factor of ~3 that you get back in that comparison. So the more comparable number is more like 3-4%. Still very low of course. The electric motors are also lighter than what creates equivalent power for gasoline so there's another small amount you recover there. ~5% is probably reasonable.

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#37
post #32
post #30

Battery noob here: Will this achieve the energy density of fossil fuels? In other words, a 50 litre tank of petrol gets me around 500 km. What will a similar volume of these batteries get me?

Not even close, but that's not so bad. ICEs will probably always have their place but most people can go without, especially in Europe (Americans are very loud about how they need to drive 3000 miles to work everyday so I won't bother arguing that)

[deleted]

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#38
post #6

IF this is true, it would be a massive breakthrough. Truly monumental. Hence, I am skeptical. But otherwise, this would be a massive thing. a 2x capacity per weight advantage of batteries? Without an increase in space? That comes down to doubling the range of EVs, and making electric planes and rockets a lot more viable. A 3x capacity per space advantage means roughly a 3x improvement in your phone and laptop battery…

>Or, more likely, a slight improvement in your phone and much thinner phones. On laptops, we might see the return of more ports. // Please, no. I don't understand the utility of making something so expensive be so fragile and hard to hold. My phone is 5mm thick, that's already too thin for me. Does anyone want thinner phones or is it just a marketing thing?

Marketing.

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#39
post #8
post #4

Earlier quoted context omitted.

"If its too good to be true..." Its healthy to be skeptical until an extraordinary is proven. Meanwhile can I interest you in investing in my hydrogen truck company called TeslaNikola? Its carbon free, costs close to nothing to run. We have a working prototype capable of going downhill.

Too bad Nikola Tesla didn't had a middle name.

How about Wardenclyffe, or Smiljna - both sound like reasonable company names to me.

Re: Vertically aligned carbon nanotubes triple the density of lithium batteries

#40
post #6

IF this is true, it would be a massive breakthrough. Truly monumental. Hence, I am skeptical. But otherwise, this would be a massive thing. a 2x capacity per weight advantage of batteries? Without an increase in space? That comes down to doubling the range of EVs, and making electric planes and rockets a lot more viable. A 3x capacity per space advantage means roughly a 3x improvement in your phone and laptop battery…

>Or, more likely, a slight improvement in your phone and much thinner phones. On laptops, we might see the return of more ports. // Please, no. I don't understand the utility of making something so expensive be so fragile and hard to hold. My phone is 5mm thick, that's already too thin for me. Does anyone want thinner phones or is it just a marketing thing?

I wouldn't mind too much if it meant I could put a case on it and have it be the size it is now.
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