Graphene Oxide News
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.
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 the University of Southern California developed better performing and cheaper Li-Ion batteries. The researchers developed new cathode and anode materials.
The anode in the new batteries is made from Silicon, and they say that this anode is three times more powerful and longer lasting compared to a typical graphite anodes. The cathode they used is made from sulfur powder coated with graphene oxide.
Researchers from Australia and Ireland developed a flexible yarn made from graphene oxide. This strong, lightweight, highly conductive and high capacitance fiber may be a great material for wearable textiles.
The researchers report that the new yarns and fibers exhibit the best electrochemical capacitance ever - of as high as 410 F/g. To create the fiber, the researchers used a novel wet-spinning technique that can produce both GO and r-GO yarns of unlimited lengths. Those yarns are strong (with a Young’s modulus that is greater than 29 GPa), have a high electrical conductivity of around 2500 S/m and a very large surface area – about 2600 m2/g for graphene oxide and 2210 m2/g for the reduced material.
Graphene Batteries reportedly tested over 50 types of graphite before choosing GSI's graphite. GSI is offering high quality natural graphite at $16,000 per ton. GS International, together with the RS Group also aims to become a research partner to Graphene Batteries. The GS Group and GSI also plans to scale-up Graphene Oxide production soon.
Researchers from the University of Pittsburgh and the Qingdao University of Science and Technology are studying drug delivery systems based on graphene oxide nanocomposite films. They found a way to consistently release anti-inflammatory drugs by applying electricity. Such a technique can be useful to treat epilepsy for example - when medication is "waiting inside the body" and will only be released when a seizure starts.
The researchers are using polymer thin films covered with GO nanosheets. They then coat it with an anti-inflammatory drug. This structure is then coated on an electrode. Applying electric current to the electrode causes it to release the drug. By changing the size and thickness of the GO sheets, the researchers can control how much drug is carried.
Researchers from Nanyang Technological University in Singapore demonstrated how Indium and Indium chloride (InCl) can be improve the process of reducing graphene oxide to graphene. The Indium helps by regenerating the sp2-conjugated system or selectively removing key oxygen-containing groups that could potentially decrease the performance of the graphene.
The researchers developed a method to apply the Indium, and they say that this method can be applied independently or in conjunction with other reducing agents to further improve the quality of chemically reduced graphene.