Graphene-Info is the web's leading resource on graphene material technology

Graphene is the world's strongest, thinnest and most conductive material, made from carbon. Graphene's remarkable properties enable exciting new applications. Our site brings you daily news and resources, all graphene focused.

Recent Graphene news:

Graphene may enable light, elastic and conductive springs and actuators

Researchers from China's Beijing Institute of Technology developed graphene-based springs that can function as actuators. Those springs are very light and offer good thermal and electrical conductivity. They are also easy to functionalize and work in harsh conditions.

Most springs today are metal. There has been attempts to create carbon-based springs which are lightweight compared to the metal springs - but those exhibit poor elasticity. But these new graphene springs are very elastic - they can be elongated to 480% of their original size and maintain stable elasticity even after being stretched 100,000 times to 300% of their size.

Graphene's conductivity changes at the edge of the material

Researchers from the UK's National Physical Laboratory (BPL) discovered that graphene conductivity in the edges is different compared to the center of the material.

Using local scanning electrical methods, the researchers examined the local nanoscale properties of a graphene Hall bar device. It turns out that at the center of the channel, the graphene is n-doped (electron conduction) while at the edges it is p-doped (hole conduction).

New method to quickly transfer graphene sheets from metallic substrate without any damage

Researchers from Korea's KAIST institute in collaboration with researchers from Korea University and the KIMM institute developed a new method to transfer graphene from a metallic substrate to any other substrate without any damage to the graphene. The method is very fast and is not expensive.

Current transfer processes can introduce impurities or even damage pure graphene sheets when the are transferred after being synthesized using CVD. The new method, however, uses heat, an electric field and mechanical pressure to attach the graphene to a new substrate using a strong adhesive force. The metallic substrate is pulled away mechanically.

Is Tesla developing a graphene-enhanced Li-Ion battery?

Tesla's current Model S car has batteries with a capacitance of 85 kWh, which enables the car to drive up to 480 km between charges. The company's CEO, Ilon Mask, recently said that the company is developing "new battery technology" that will almost double the capacity - and will allow the cars to drive up to 800 km between charges.

Today, China News Network posts an article saying that Tesla's new battery technology is based on graphene. This makes sense as graphene-based battery electrodes can dramatically increase battery charge time and capacity. There are many companies developing this technology and it's likely that Tesla is collaborating with one (or more of these companies).

Used cigarette filters turned into supercapacitor electrodes that outperform graphene-based ones

Researchers from Seoul National University developed a one-step method to prepare a carbon material (which they call NCF) from used cigarette filters. They used the NCF to create supercapacitor electrodes - which exhibit a better rate capability and higher specific capacitance compared to conventional activated carbon. The capacitance is actually higher than N-doped graphene or N-doped CNT electrodes.

NCF is a nitrogen doped (N-doped) meso-/microporous hybrid carbon material. It is prepared via heating the filters in a nitrogen-containing atmosphere. The filters are made from mostly cellulose acetate fibers, which transform to mesopores and micropores which self-assemble into a unique pore structure.

Laser used to measure contaminants on graphene sheets

Researchers from Rice and Osaka Universities discovered a simple method to measure contaminants on graphene sheets using terahertz spectroscopy.

The researchers placed the graphene on a layer of Indium Phosphide, and then used a laser pulse on the graphene. This causes the materials to emit terahertz waves, which can then be used to map contaminants (which change graphene's electrical properties) on the graphene sheet.

Grafoid inaugurates their new R&D facility in Kingston, Ontario

Following Grafoid's ALCERECO acquisition (for $1.25 million CAD) a couple of months ago, the company will inaugurate its new R&D facility in Kingston, Ontario (ALCERECO's production site) later this week.

When Grafoid announced the acquisition of the advanced material developer, they said they hope to use ALCERECO's production facility and convert it to MesoGraf graphene production. Grafoid will use graphene ores from Focus Graphite's Lac-Knife mine and exfoliate them to graphene materials.

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