A battery that can recharge in seconds: Researchers use supercapacitor parts to build a new type of sodium-ion battery

[DanteSmith]

98%? Capacitor efficiency is measured by Q factor; one can get High-Q caps with factors of 10,000, translating to an efficiency of 99.99% -- one thousand times as efficient as a Li-Ion charge cycle. While we live in a universe in which the Second Law of Thermodynamics operates no system is perfectly efficient, but charging a capacitor is about as close as it gets. While you're correct on a theoretical basis, in practice when charging losses are infinitesimal compared to those elsewhere in the system, they can be modeled as zero.

However, it is important to recognize that this exceptional efficiency is specific to certain applications and ideal conditions. In many real-world scenarios, capacitor efficiency can be significantly reduced by a variety of factors. For example, the capacitor's internal resistance, the type of dielectric material used, and environmental conditions can negatively affect its efficiency.

Furthermore, if we consider a product that combines supercapacitors and a battery, the process of charging and discharging can also generate energy losses, especially at higher frequencies.

 

[Che Cazzo]

It's not greed. If it was, then communist countries would already be using said tech, and bits of it would be seen in use by the elite.

Turns out making new battery tech is actually REALLY REALLY HARD and just because it works in a lab doesnt mean its durable, or can work at low temp, or make useful voltages, or survive multiple recharge cycles, or....

Whoa, cowboy,! Easy with the hyperbole and wrong facts!! Greed was invented and practiced daily on Wall Street, which as far as I know, is not communist. You never heard the "Greed is Good" phrase anywhere, or you just think it's just a lame joke on Wall Street?

Communist countries are greedy, sure, but Wall Street and its get-rich-quick peddlers put ANY communist country to shame!
Google "Pharma Bro" and you'll get a dose, pun fully intended, of how the price of a certain medication (among 100s others) went from a few bux to $650 practically overnight(!!)...just because a Wall Street hustler bought the company!

Get your facts straight, then get back to to this forum, where allegedly intelligent people can tell what is BS and what is semi-facts before they hit the "Like" button..

 

[Theinsanegamer]

Whoa, cowboy,! Easy with the hyperbole and wrong facts!! Greed was invented and practiced daily on Wall Street, which as far as I know, is not communist. You never heard the "Greed is Good" phrase anywhere, or you just think it's just a lame joke on Wall Street?

Communist countries are greedy, sure, but Wall Street and its get-rich-quick peddlers put ANY communist country to shame!
Google "Pharma Bro" and you'll get a dose, pun fully intended, of how the price of a certain medication (among 100s others) went from a few bux to $650 practically overnight(!!)...just because a Wall Street hustler bought the company!

Get your facts straight, then get back to to this forum, where allegedly intelligent people can tell what is BS and what is semi-facts before they hit the "Like" button..

LOL somebody's mad. Maybe state a fact that I got wrong? Jealous of upvotes?

Silly American, the world does not revolve around you! You and Wall street do not have a monopoly on battery tech. That shouldnt need to be explained to you. The reason these experimental battery techs never come to fruition is because, as I stated before (and you failed to refute) making new tech that works in the real world is very hard!

If you want to insinuate that greed is the reason this tech isnt in our hands, how about some proof? We're talking batteries BTW, so dont stray out looking for unrelated examples!

Hell, I'll settle for this: Can you explain why this research from the "Korea Advanced Institute of Science and Technology (KAIST)" would be dependent on Wall street?

 

[BadThad]

It's funny, they always build "a better mouse trap", it's no different with batteries. Seems like every month for the past 10 years somebody claims a battery breakthrough. Nonetheless, here we are today using lithium still. For me, the only stories with much credence involve Toyota. A lot of it is marketing hype; however, a company of that size has the expertise and money to pour into the development of the technology.

But....capacitors are the "SSD" of power delivery. The real breakthrough will be when capacitor technology advances to surpass the "rotating HDD's" that today's batteries represent.

 

[Greennovator]

Yeah, I'm with 'Gastec' here ...
Who wants to handle a pair of 8/0 cables (183.5 mm²) to charge their vehicle. Mind you, it's probably 800VDC pumping 1,000A. Don't forget that without serious electronic controls, a capacitor based system will 'dump' all of its power at once, far exceeding those (for a moment).
These numbers are theoretical from engineers that have never really 'gotten their hands dirty' in real world applications.
Maybe for ships or locomotives, with massive portside BBS systems that can [slowly] recharge, and with close tolerance robotic contractor systems --- where no human can get close.
Dream big, but keep a healthy reality check.

 

[Endymio]

Mind you, it's probably 800VDC pumping 1,000A.

Err, that's nearly one full megawatt of power -- enough to charge your average 50 kW-hr in just over a minute -- much faster than even a gas-fueled vehicle fills their tank. Let's not exaggerate the figures for effect.

Don't forget that without serious electronic controls, a capacitor based system will 'dump' all of its power at once

One spark or excess heat in the wrong place, and a tank of gasoline will 'dump' all its energy at once. We've seemed to manage OK with that, even a century ago, when no "serious electronic controls" existed to mitigate the risk.