Researchers develop mechanically robust nanocellular graphene for sodium-ion batteries – Charged EVs

baua

Researchers develop mechanically robust nanocellular graphene for sodium-ion batteries – Charged EVs


Researchers at Tohoku University in Japan have discovered a means to achieve crack-free, robust nanocellular graphene (NCG) to use in a sodium-ion battery (SIB).

NCG is a specialized form of graphene that achieves a large specific surface area by stacking multiple layers of graphene and controlling its internal structure with a nanoscale cellular morphology. However, its use has been limited by defects that occur in manufacturing. Cracks often appear when forming NCG.

The research team demonstrated that NCG developed using a dealloying method exhibited high tensile strength and high conductivity after graphitization, and put the material to the test in a sodium-ion battery. Dealloying is a processing technique that exploits the varying miscibility of alloy components in a molten metal bath. This process selectively corrodes certain components of the alloy while preserving others.

“We discovered that carbon atoms rapidly self-assemble into crack-free NCG during liquid metal dealloying of an amorphous Mn-C precursor in a molten bismuth,” said Won-Young Park, a graduate student at Tohoku University. “We used the developed NCG as an active material and current collector in an SIB, where it demonstrated a high rate, long life and excellent deformation resistance.”

Source: Tohoku University



Automakers whine about €15B fine they knew they’d risk for pushing gas cars

Photo by Simone Ramella on Flickr Renault CEO Luca de Meo said today that automakers…

Tesla reveals its wireless home EV charging station in patent filings

Photo: Tesla Several new patent applications have revealed Tesla’s upcoming wireless home EV charging station….

The Economics of Solar Energy: Is It Worth the Investment?

As solar energy becomes more popular, many people wonder whether investing in solar panels is…