HKG plans to manufacture cars with graphene-enhanced batteries

Apr 20, 2017

China's Hybrid Kinetic Group, a producer of lithium-ion batteries and hybrid vehicles, announced its aim to build car assemblies in three to five locations across China, with an initial production capacity of 300,000 units within three years, eventually expanding the capacity to 1 million units. While not many details were given, it was said that some of the models are to be powered by a 30 kilowatt battery using graphene with a 60 kw micro turbine power generator that theoretically can extend the battery’s range to 1,000 kilometers on each charge.

HKG's car with graphene battery imageThe H600 prototype by HKG

HKG is using US technology, and has commissioned designs by the Mahindra Group’s design studio Pininfarina. The company stated that “expansion of the production will depend on the market reactions”. and that “negotiations with car part makers are going on smoothly.”

MIT team uses graphene as a "copy machine" for semiconductors

Apr 20, 2017

Researchers at MIT have developed a technique that uses graphene as a kind of “copy machine”, to transfer intricate crystalline patterns from an underlying semiconductor wafer to a top layer of identical material.

Graphene as intermediary for semiconductors image

As a great deal of money is spent in the semiconductor industry on wafers that serve as the substrates for microelectronics components, which can be turned into transistors, light-emitting diodes etc., this method may help reduce the cost of wafer technology and enable devices made from more exotic, higher-performing semiconductor materials than conventional silicon.

Non-flammable graphene oxide membrane developed for safe mass production

Apr 19, 2017

Researchers at the University of Arkansas have demonstrated a simple and scalable method for turning graphene oxide into a non-flammable and paper-like graphene membrane that can be used in large-scale production. This tackles the issue of high flammability, which has, according to the team, been an obstacle to further development and commercialization.

Using metal ions with three or more positive charges, the researchers bonded graphene-oxide flakes into a transparent membrane. This new form of material is flexible, nontoxic and mechanically strong, in addition to being non-flammable. Further testing of the material suggested that crosslinking, or bonding, using transition metals and rare-earth metals, caused the graphene oxide to possess new semiconducting, magnetic and optical properties.

Graphene-based transistors show promise for optical technologies

Apr 18, 2017

Researchers at Purdue University, the University of Michigan and Pennsylvania State University have combined graphene with a (comparatively much larger) silicon carbide substrate, creating graphene field-effect transistors which can be activated by light. This may lead to the development of highly sensitive graphene-based optical devices, an advance that could bring applications from imaging and displays to sensors and high-speed communications.

GFETs show promise for optical technologies image

A typical problem of graphene-based photodetectors is that they have only a small area that is sensitive to light, limiting their performance. “In typical graphene-based photodetectors demonstrated so far, the photoresponse only comes from specific locations near graphene over an area much smaller than the device size,” the team said. “However, for many optoelectronic device applications, it is desirable to obtain photoresponse and positional sensitivity over a much larger area”. The researchers tackled exactly this in their new work.

Malaysia's KTMB purchases electric trains with graphene-based supercapacitors

Apr 18, 2017

The Ministry of Transport, national operator KTMB in Malaysia and China's CRRC Zhuzhou Locomotive have signed a €180 million contract for the supply of 22 electric multiple-units of two types.

The order includes 13 EMUs with a capacity of more than 500 passengers, with a maximum speed of 100 km/h. These are said to be equipped with CRRC's graphene-based supercapacitors. CRRC said the 60 kF capacity energy storage would enable 85% of the braking energy to be recovered for use when accelerating.