Graphene-Info is the web's leading resource on graphene material technology
Graphene is the world's strongest, thinnest and most conductive material, made from carbon. Graphene's remarkable properties enable exciting new applications. Our site brings you daily news and resources, all graphene focused.
Recent Graphene news:
Researchers from George Washington University developed a carbon nanotube and graphene composite material based ultracapacitors that combines high performance with low cost. The specific capacitance of the device is three times higher compared to CNT-pure capacitors.
The researchers explain that the hybrid structure is useful because the graphene flakes provide high surface area and good in-plane conductivity, while the carbon nanotubes connect all of the structures to form a uniform network. In addition, the production method is simple, scalable and low cost.
On April 14, Haydale went public last week and raised £6.6 ($11 million). Now it is reported that Haydale is considering to sue its broker (Hume Capital Securities) after it "temporarily" dropped all of its market-making activities on IPO day.
At the open of the trading session on that day was 225 pence per share. Since the IPO the shares dropped over 28% (to 160 pence). On the first trading day the share dropped 15%.
Veritcally-aligned graphene oxide flakes enable supercapacitors that can charge 1,000 faster than regular graphene ones
Researchers from Korea's Sungkyunkwan developed new supercapacitors that can charge 1000 times faster than current graphene supercapacitors, while also having three times the energy capacity. To achieve this fast charge (and discharge) times,t he researchers used vertically aligning graphene oxide flakes.
The researchers created a graphene oxide film using a carbon nanotube, and then used cutting and heat treatment to develop the vertically-structured graphene electrodes. The researchers also inserted a VNT into the GO sheets and created regular patterned pores in the GO films. All this resulting in electrodes that is much faster than solid and vertically-structured graphene used in existing supercapacitors.
Researchers from China discovered that dragging a droplet of salt water on graphene generates a small voltage difference. The researchers found a linear relationship between the velocity and the generated electricity - the faster you drag the droplet, the higher the voltage.
The researchers explain that the charge distribution on the sides of the droplet is redistributed symmetrically on both sides when the droplet is not moving. But when you move it, the distribution becomes unbalanced and electrons are desorbed from the graphene at one end of the droplet and are adsorbed into the graphene at another end. This results in a large potential on one side of the droplet and generates a measurable voltage across its length.
Japan's National Institute for Materials Science (NIMS) singed an agreement with China's Southeast University (SEU) to co-design graphene based materials as platinum alternatives for electro-catalysts and develop high quality fuel cell electrodes.
A young professor from SEU (who worked at NIMS earlier) aims to design unique molecular structures of electrodes and his aides at NIMS will examine the performance of the electrodes and fuel cell devices.
Thermene launched the second-generation Thermene product, which is a graphene-based high-performance thermal paste. Thermene is used to cool processor and video cards. The second generation product offers better performance (up to 12° Celsius cooler than the first generation) and is also cheaper by 25%.
The company says that the graphene-based paste handily beats the performance of Arctic Silver 5 and other standard thermal pastes by an average of 7° Celsius. The $14.99 product comes in a 3 mL syringe which improves the application experience, and one syringe of Thermene can be applied on up to 15 standard-size processors. The 2nd-gen Thermene is now shipping worldwide.
Researchers from ETH Zurich and LG Electronics developed a stable porous membrane made from only 2 layers of graphene. They say that this is the thinnest possible porous membrane that is technologically possible to make.
The new membrane can be used as a filter for several different purposes - such as waterproof clothing. In fact the researchers say that their membrane will be a thousand fold more breathable than Goretex! Other applications may include water filteration and gas and liquid flow rate measurements.