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.
Last month Cientifica signed an exclusivity agreement with London Graphene to develop technology using graphene for energy storage. Today Cientifica announced that London Graphene signed an option agreement with ISIS Innovation (the technology transfer office for the University of Oxford) to license a patent filed by Isis Innovation.
This patent application details a 2D nanomaterial CVD-based production process that can be used to make high quality graphene on copper foil. This patent will be used in the company's energy storage project, and in fact the option is exclusive to the fields of capacitors and batteries.
Yole Developpement released a new graphene market report, in which they forecast that in 2024 the graphene material market will reach $141 million, driven mainly by transparent conductive electrodes and energy storage applications.
According to Yole, the market in 2013 was about $11 million, and it will grow slowly till 2017. In 2019 the market will experience faster growth (35.7% CAGR).
Angstron Materials (owned by Nanotek Instruments and based in Ohio, USA) is a graphene nanoplatelets (GNPs) and single-layer graphene sheets developer and producer.
Ian Fuller, the company's marketing and business development chief, was kind enough to answer a few questions we had regarding the company's technology and business. Ian joined Nanotek Instruments in 2006, focusing on fuel cells. He later joined the Angstron Materials team.
Researchers from Japan's NIMS institute developed a way to produce products based on structured graphene that is 'glued' to a 3D strutted framework.
The researchers say their method was inspired by the blown sugar art, and they call it the "chemical blowing method". In their method, glucose and ammonium salt are mixed and heated (at 250 degrees Celsius), which results in glucose-deriving polymers. The released ammonia gases blow polymers by creating pressure from within.
Back in May, Lomiko Metals, Stony Brook University (SBU) and Graphene Labs signed an agreement toinvestigate graphene based applications - mainly supercapacitors and batteries. Today the companies announced that they have reached a significant milestone by receiving a prototype graphene supercapacitor and a report from Stony Brook University and New York State’s Center for Advanced Sensor Technology (Sensor CAT).
The supercapacitor prototype was made using graphene composite material prepared using a proprietary technology developed at Graphene Labs. The measured specific capacitance of the prototype was found to be around 500 Farad per gram of the material. This value is comparable with the best values reported in the literature for a supercapacitor of this type.
Researchers from Korea's Gwangju Institute of Science and Technology in Korea developed high-performance supercapacitors based on graphene. They say these capacitors can store almost as much energy as a Li-Ion battery and can charge/discharge in seconds. They also last for many tens of thousands of charging cycles.
The researchers use a highly porous graphene that has a huge internal surface area. To fabricate this material they reduced graphene oxide with hydrazine in water agitated with ultrasound. This results in a graphene powder that they then packed into a cell shaped like a cell and dried it at 140 degrees Celsius under pressure for five hour. The material was used as an electrode.