Posted on 11/27/2017 1:51:11 AM PST by TigerLikesRooster
Samsung develops 'graphene ball' to speed up battery charging
Samsung Advanced Institute of Technology (SAIT) has synthesized a 'graphene ball' that can be used to make lithium-ion batteries charge five times faster.
By Cho Mu-Hyun | November 27, 2017 -- 05:08 GMT (13:08 GMT+08:00) | Topic: Innovation
Samsung Electronics' research arm has successfully synthesized a "graphene ball" that can be used to make lithium-ion batteries last longer and charge faster, the company has said.
Samsung Advanced Institute of Technology (SAIT) said using graphene ball material to make batteries will increase their capacity by 45 percent and increase their charging speed by five times.
Current lithium-ion batteries take an hour to fully charge but this will be reduced to 12 minutes with the new tech, Samsung said.
Batteries that use graphene ball can also maintain a temperature of 60 degrees Celsius that is required for use in electric cars, the company added.
The full findings of SAIT were published on Nature this month. SAIT's team found a mechanism to use SiO2, or silica, to synthesize graphene like three dimensional popcorn. They then used these graphene balls as material for anode and cathode on lithium-ion batteries.
(Excerpt) Read more at zdnet.com ...
BTTT
Can anyone explain why the popcorn graphine acting as the anode and cathode would increase capacity and speed of charging, but not speed of discharge?
Looks tasty.
BTW, replaced the standard sealed lead acid starting battery in my Harley-engined bike with a battery based on A123 cells (lithium iron phosphate). Battery went from 14.5 pounds to 2.25 pounds, significant weight loss on a motorcycle.
Surface area, conductivity of the electrodes, and the ability to reject heat during charge and discharge cycles.
Cell charge and discharge rates are limited by their internal resistance, which can cause too much heat to build up within the cell, limting efficiency, and causing cell damage and failure.
That is bad with a lead-acid cell. It’s really, really, really bad with a li-ion cell.
later
later
The circuitry being fed determines how much draw there is. You have a number of outlets running from the same circuit breaker but the actual draw is determined by the number/type of devices plugged in.
Curious if it looks anything like...
‘....significant weight loss on a motorcycle.”....
Or anything else using stored batteries
If not already available, I would like to see someone come up with a miniature battery charger, perhaps solar that one carries on their person and provides the ability to charge a phones battery while they are moving about with no access to other charging capabilities. Anyone know of such a device?
In my pants pocket?
Uh, no.
If they could actually do this they wouldn’t be telling the world their secret.
Is the price of silver threatening to rise again?
External battery packs:
https://www.amazon.com/portable-phone-charger/s?ie=UTF8&page=1&rh=i%3Aaps%2Ck%3Aportable%20phone%20charger
Solar PV panels:
https://www.amazon.com/s/ref=sr_nr_n_1?fst=as%3Aoff&rh=n%3A2407762011%2Ck%3Asolar+iphone+charger&keywords=solar+iphone+charger
Nothing wrong with a faster discharge. It provides more amps for torque sensitive equipment.
“60 degrees Celsius? In my pants pocket?””
Reminds me of the time I learned not to carry a 9V battery in a pocket with coins.
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