[HN Gopher] A novel ultramicro supercapacitor with ultrahigh cha...
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       A novel ultramicro supercapacitor with ultrahigh charge storage
       capability
        
       Author : wglb
       Score  : 36 points
       Date   : 2023-04-22 17:26 UTC (1 days ago)
        
 (HTM) web link (techxplore.com)
 (TXT) w3m dump (techxplore.com)
        
       | dvh wrote:
       | Ah yes, the graphene. Material so abundant that Wikipedia's top
       | right corner still contains only CGI render.
        
         | flaviut wrote:
         | https://i.imgur.com/xdiQTLT.png
         | 
         | Like this? It's difficult to take a picture of an one atom
         | thick material. You can also easily produce it at home if you'd
         | like.
         | 
         | Or if you'd like to produce larger quantities, it seems like
         | that's also doable at home with just a few hundred dollars of
         | equipment: https://www.youtube.com/watch?v=3hHoL77QDkg
        
           | alsdfjkslfheu wrote:
           | you know that is 3d graphene. 2d graphed is impossible to
           | obtain like that.
           | 
           | this is a much better method, shorter, and the author is less
           | misleading on the claims of what they are actually making
           | https://www.youtube.com/watch?v=4Et8FEbCuCs
        
       | jschveibinz wrote:
       | Important technology
        
       | rezir wrote:
       | novel ultra super ultra
        
         | MrLeap wrote:
         | superlative capacitors
        
         | akomtu wrote:
         | super ultra high, not just super ultra
        
       | petesoper wrote:
       | Based on the article scaling would require a lot of hand eye
       | coordination!
        
       | lightedman wrote:
       | Interesting approach using a FET. I wonder how large this could
       | be scaled?
        
         | skykooler wrote:
         | If this is using the same fabrication technology as
         | conventional integrated circuits, the price is proportional to
         | die area so this is going to be very expensive for its size. I
         | could see this powering a phone if the energy density is high
         | enough, but there's no way the economics would work out to
         | power a car.
        
           | convolvatron wrote:
           | given that you're _trying_ to make huge gates with poor
           | switching speed, my guess is you can use a pretty antiquated
           | process
        
       | jakedata wrote:
       | The danger of improperly handling capacitors is well documented,
       | but if they are deceptively small it might lead to carelessness.
       | One of their little chips is probably innocuous enough. In series
       | you had better be careful. Best case you melt your screwdriver.
       | Worst case you melt your finger.
       | 
       | It sounds like a useful thing for regenerative braking, quick
       | charging phones or perhaps as a replacement for a lead-acid car
       | battery.
        
         | jakedata wrote:
         | wow -3 and counting! Didn't anyone ever toss you a charged
         | capacitor in class?
        
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       (page generated 2023-04-23 23:01 UTC)