AIXTRON demonstrates new graphene production systems

AIXTRON recently showcased two of its systems, which enable cost effective graphene production for a myriad of applications such as consumer electronics, sensors and photonic applications.

AIXTRON exhibits graphene production systems imageAIXTRON's new 'Neutron' roll to roll system for the production of graphene. Credit: AIXTRON

Graphene Flagship partner AIXTRON introduced results from two of its systems that enable the large-scale production of graphene through chemical vapor deposition (CVD). The Neutron is a roll-to-roll system capable of depositing large areas of graphene on metal foils under ambient conditions; and the CCS 2D system enables wafer-scale production of graphene on insulating wafers, a breakthrough that could speed up the development of new graphene electronics.

GrapheneCA launches Mobile Graphene Container System for in-house graphene manufacturing

GrapheneCA recently announced the development of a novel Mobile Graphene Container System (MGCS), a scalable, modular graphene production system, to help companies manufacture graphene in-house.

GrapheneCA creates mobile graphene container system for in-house graphene manufacturing image

The New York-based company, which develops graphene-based technology for industries, said MGCS is available in 40-foot containers that are designed specifically for industrial producers and high-tech applications.

ZEN Graphene signs Agreement on low cost, high-yield graphene production process

Zen Graphene Solutions logo imageZEN Graphene Solutions has announced the signing of an initial agreement to in-license certain intellectual properties from a Canadian University that when combined with ZEN’s Albany Graphite, produces low cost, environmentally friendly graphene.

The production process rapidly exfoliates Albany Graphite into few layer graphene (FLG, 2-5 layers) with a conversion efficiency of over 90%. Previous work has reportedly demonstrated that the Albany Graphite was converted to graphene far more efficiently when compared to flake or metamorphic graphite. This advantage was said to be confirmed by recent testing using this new process.

Researchers at Queen's University develop a novel, scalable and low-cost process to produce defect-free graphene nanoplatelets

Researchers at Queen’s University in Kingston, Canada have developed a simple yet effective exfoliation process for producing few-layer graphene nanoplatelets (FL-GNPs). Utilizing this one-step, chemical and solvent-free process the researchers were able to convert graphite flakes (+100 mesh, purity >97%) into FL-GNPs at a high yield (90%) and to subsequently form thermoplastic/FL-GNPs composites with improved electrical and mechanical properties.

Queens University FL-Graphene TEM photo TEM image of isolated FL-GNP

The exfoliated graphene nanoplatelets had a high specific surface area (325 m2/g), an aspect ratio above 500 (approximate lateral dimensions of 2µm and thickness of 3.5 nm), and a Raman D/G ratio of 0.3; indicating a structure with few defects. The flexural modulus of polyamide/FL-GNP composites containing 15 volume % FL-GNPs improved from 1850 MPa to 5,080 MPa while the electrical conductivity rose from 5x10-14 S/m to 21 S/m. Surface-coating the FL-GNPs through the addition of a coating agent during the last stages of the exfoliation process rendered the FL-GNPs more hydrophilic, thus, forming stable dispersions in water.

Global Graphene Group launches a graphene-silicon Li-Ion battery anode material

Global Graphene Group, and its subsidiary Angstron Energy (AEC) has developed a new graphene/silicon composite anode material (GCA-II-N) which can increase the capacity of Li-Ion batteries while reducing the battery's size and weight. AEC current market focus is on electronic bikes and consumer electronics, but is also working with Tier-1 electric cars and trucks makers.

Global Graphene Group graphene-silicon anode material
AEC tells us that by wrapping single-layer graphene (or r-GO) around silicon nanoparticles, the volume expansion/contraction of the Silicon during the battery's charge/discharge cycle can be cushioned by the flexibility and mechanical strength of the graphene. The graphene sheets also form a 3D conductive network which ensures good electrical contacts between the Silicon particles and the current collector.