A new graphene oxide coating to improve the performance of lithium-sulfur batteries

Mar 21, 2017

Researchers at Yale University have developed an ultra-thin coating material, based on graphene oxide, that has the potential to extend the life and improve the efficiency of lithium-sulfur batteries. The newly developed material is a dendrimer-graphene oxide composite film, that can be applied to any sulfur cathode.

GO coating to improve Li-sulfur batteries performance image

The researchers state that sulfur cathodes coated with the material can be stably discharged and recharged for more than 1,000 cycles, enhancing the battery’s efficiency and number of cycles. In addition, they said “the developed film is so thin and light it will not affect the overall size or weight of the battery, and thus it will function without compromising the energy and power density of the device”.

Skeleton Technologies launches graphene-based engine start supercapacitor

Mar 19, 2017

Skeleton Technologies, developer and manufacturer of high energy and power density supercapacitors, has announced launching a new graphene-based engine start module to help power heavy industry vehicles in extreme conditions. Called SkelStart Engine Start Module 2.0, it is available in 24V and 12V versions and is based on the graphene-based SkelCap supercapacitors, which Skeleton says provide the highest power and energy density on the market.

Skeleton's new graphene-based supercapacitor image

The new module’s casing is made of non-flammable material that is resistant to vibration and shock, and is a stud terminal device in BCI Group 31 size. Skeleton states that “SkelStart Engine Start modules are designed to provide reliable engine starting in even the harshest conditions, as well as reduced ongoing costs on maintenance and replacement. Businesses can therefore expect their equipment to work cost effectively year-round, affording them peace of mind.”

Graphene: history, controversy and the Nobel prize

Mar 16, 2017

Graphene, the much-hyped 2D matrix of carbon atoms arranged in a honeycomb lattice, is the lightest, strongest, thinnest material known to man, as well as the best heat and electricity conductor ever discovered - and the list does not end there. Graphene is the subject of relentless research and is thought to be able to revolutionize entire industries, as researchers hypothesize many potential kinds of graphene-based materials and applications.

Andre Geim and Kostya Novosolov Nobel prize award photo

The excitement surrounding graphene soared since Sir Andre Geim and Sir Kostya Novoselov were awarded the 2010 Nobel Prize in Physics, "for groundbreaking experiments regarding the two-dimensional material graphene". Geim and Novoselov extracted graphene from graphite, using the "scotch tape" method, to obtain a piece of graphene (or carbon) one atom thick.

Graphene used in a molecule that converts carbon dioxide to carbon monoxide

Mar 15, 2017

An international team of scientists has designed a molecule that uses light or electricity to convert the greenhouse gas carbon dioxide into carbon monoxide. The process includes using a nanographene-rhenium complex connected via an organic compound known as bipyridine to trigger a highly efficient reaction that could someday replace solar cells.

Graphene compound to replace solar cells image

The molecule acts as a two-part system: a nanographene "energy collector" that absorbs energy from sunlight and an atomic rhenium "engine" that produces carbon monoxide. The energy collector drives a flow of electrons to the rhenium atom, which repeatedly binds and converts the normally stable carbon dioxide to carbon monoxide. The idea to link nanographene to the metal arose from earlier efforts to create a more efficient solar cell with the carbon-based material. But this model actually eliminates the solar cells, and uses the light-absorbing quality of nanographene alone to drive the reaction.

Grafoid unveils GPURE graphene membrane for Li-ion batteries

Mar 15, 2017

Grafoid logoGrafoid, the Canadian graphene R&D, investment and technology company, announced the development of its GPURE Graphene Polymer nano-porous membrane intended for next generation Li-Ion battery applications.

The GPURE graphene polymer membrane (GPM) was developed as a chemically inert, freestanding membrane using graphene composites to test ion selectivity using both monovalent and divalent ions. Ion selectivity is a key requirement for a semi permeable membrane in a Li-ion battery structure. By protecting the sensitive electrode materials from unwanted chemical species GPURE GPM diffuses only energy harvesting monovalent ions such as Li+, Na+ etc.

Thomas Swan launches a high-performance graphene intermediate product for coatings

Mar 15, 2017

Thomas Swan logoThomas Swan has announced the launch of a high-performance graphene intermediate product for coatings formulators. The new Elicarb Graphene product is a cost effective, stable, easy to handle dispersion of Elicarb Materials Grade Graphene powder for formulation into epoxy-based coating formulations. The product is available now in liter quantities for testing and evaluation.

Thomas Swan has established a 20 tonne per year capability for the manufacture of Elicarb Graphene and Elinova Boron Nitride products at its UK manufacturing site in Consett, County Durham. Elicarb Graphene Epoxy Dispersion is a high performance intermediate product which is intended for further optimization and incorporation into customers’ existing proprietary coating systems. The graphene dispersion is targeted at improving corrosion resistance, thermal conductivity, chemical barrier and mechanical resistance in industrial coatings.

Directa Plus announces graphene-enhanced eyewear collection by Ray-Ban collection with G+ inside

Mar 14, 2017

Directa Plus, a producer and supplier of graphene-based products for use in consumer and industrial markets, recently announced that its graphene-based materials have been selected by Luxottica Group, a company that designs, manufactures and sells eyewear, to enhance a new range of Ray-Ban glasses.

Directa Plus and Ray-Ban produce graphene-enhanced eyewear image

Ray-Ban updates that during the creation process of this collection, every detail—from design to production techniques—has been studied to make the best use of the characteristics of graphene. The molds, for example, were designed with special care to facilitate equal distribution of the material, a special mixture of resins and graphene, all over the front of the frame.