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In Five Minutes, The Scientists Used Asphalt To Charge Up To 20 Times Faster
Oct 09, 2017

According to a new study, lithium ion batteries with a bit of bitumen can be charged up to 10 to 20 times the speed of a commercial lithium-ion battery.

Charging the battery will no longer take hours, and the batteries will be charged from zero to full for just five minutes.

The researchers developed a porous carbon anode made of bitumen, which remained unusually stable after more than 500 cycles of charge and discharge.

When developing new batteries, scientists at rice university in the United States used bitumen derivatives, called black bitumen.

They are coated with lithium metal and added to the anode of the carbon sulfide material.

Scientists have found that the asphalt and lithium anode current density can be as high as 20 milliammeters per square centimeter.

That means it will be charging much faster than ordinary lithium-ion batteries.

The new battery has a power density of 1322 watts per kilogram and the power density is as high as 943 watts per kilogram.

Rice university chemical expert James tour (JamesTour) said, "this kind of battery capacity is very big, but it is also significant, they charge by the zero charge it to full electricity only need 5 minutes, much shorter than other batteries for 2 hours or longer."

Tests showed that the new batteries could also block the formation of lithium dendrites, which damage the battery's electrolytes and even cause batteries to scrap, fire or explode.

But an early project at rice university in the lab revealed that graphene and the anode of carbon nanotubes can also prevent dendrites from forming.

Tours, but said that the new material is more simple, "although the former and the capacity of the battery are similar, close to the lithium metal theory the limit, but from asphalt carbon, can accommodate more lithium metal in unit area, and the manufacturing process is more simple, the cost is lower.

No chemical vapor deposition process, no electron beam deposition process, no use of graphene growing carbon nanotubes, so the manufacturing process is greatly simplified.


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