Supercapacitors News

Researcher suggest using rice husk to produce graphene materials

Researchers from Japan and Korea suggest a new way to make graphene - from rice husk (agricultural "waste"). They say that this method may prove to be an easy, scalable and cheap way to produce graphene. As annual rice husk waste is about 120 million tons a year, it's potential for graphene feed material is large.

Activated carbon has been made for a long time from rice husk ash, but this is the first time that graphene structured have been observed in such rice husk-derived activated carbon. In addition, the researchers found that highly crystalline and atomically clean edges are present in the synthesized materials, even though the graphene sample was prepared at relatively a low temperature of 850°C. These findings suggest that the resulting graphene may find applications in energy storage and conversion devices.

New high capacitance GO yarns are strong, lightweight and highly conductive

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.

Cientifica's partner licenses a CVD graphene process patent for energy storage applications

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 Developments sees a $141 million graphene material market in 2024

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).

Interview with Angstron Materials' head of marketing and business development

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.

3D strutted graphene developed using a novel method

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.

Lomiko Metals and Graphene Labs report on advances in the RGO supercapacitor program

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.

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