Talga Resources reports positive test results on graphene Li-ion batteries

Jun 07, 2017

Talga Resources has provided an update on initial benchmark testing of its graphene in Lithium-ion batteries, manufactured at the Warwick Manufacturing Group’s Energy Innovation Center, University of Warwick UK.

Talga GNP Li-Ion battery anode comparison (June 2017)

Following successful tests of the Company’s micrographite product, Talga announced its intention to move towards testing its graphene nanoplatelets (GNPs) as the active material of Li-ion battery anodes. Preliminary test results are highly encouraging with Talga's material exhibiting outstanding electrochemical performance that reportedly surpasses capacity measures for commercially available graphite anodes, delivering up to ~27% more energy density. The tests also showed low capacity losses (reversible capacity >99.5%) and high stability (coulombic efficiency 99.9%). Talga also reports that the results were achieved using its bulk graphene nanoplatelets, rather than few layered graphene materials (FLG), which raises potential to compete at today’s anode market cost structure.

Rice U team demonstrates a graphene-CNTs hybrid that could give Lithium batteries a major boost

May 21, 2017

Researchers at Rice University have created a rechargeable Li-ion battery, based on a hybrid of graphene and carbon nanotubes, with three times the capacity of commercial lithium-ion batteries. This was achieved mainly by addressing a major challenge known as the dendrite problem.

Rice U team's graphene-CNTs hybrid for lithium batteries image

The Rice battery stores lithium in a unique anode made of a seamless hybrid of graphene and carbon nanotubes. The material (first created at Rice in 2012) is basically a 3D carbon surface that provides abundant area for lithium to occupy. The anode itself is said to approach the theoretical maximum for storage of lithium metal with its 3,351 milliamp hours per gram capacity, while resisting the formation of damaging dendrites or "mossy" deposits.

Graphene supercapacitors minimize the need for pacemaker surgeries

May 18, 2017

Researchers from Egypt and the United States have reportedly created ultrathin, biocompatible supercapacitors that can be used as efficient and long-lasting power sources for implantable devices such as pacemakers, brain stimulators and more.

The scientists made the supercapacitors using graphene, a muscle protein and biofluids as electrolytes. The team reports that such supercapacitors can power pacemakers for a long time by utilizing protein and biofluids available in the body, reducing the need to perform surgery to replace drained power sources.

Zenyatta Ventures announced successful testing of its material in Si-G anodes for Li-ion batteries

May 17, 2017

Zenyatta Ventures has announced the successful testing of its graphene oxide material by a U.S. based advanced materials company developing silicon-graphene anodes for the next generation of lithium-ion batteries.

Zenyatta stated that preliminary results showed the ease of processing with its graphene oxide and similar electrochemical performance compared to the control material that is currently being used by the U.S. company. Zenyatta's high-purity graphite was recently converted to graphene oxide and then sent to the U.S. collaborator for testing as an advanced nano-material in a new Lithium-ion battery.

Researchers succeed in imaging how electrons move in graphene

Apr 27, 2017

Researchers at the University of Melbourne succeeded in imaging how electrons move in 2D graphene, an achievement which may boost the development of next-generation electronics. The new technique overcomes usual limitations of existing methods for understanding electric currents in devices based on ultra-thin materials, and so it is capable of imaging the behavior of moving electrons in structures only one atom in thickness.

Mapping electrons in graphene using diamonds image

The team used a special quantum probe based on an atomic-sized 'color center' found only in diamonds to image the flow of electric currents in graphene. The technique could be used to understand electron behavior in a variety of new technologies.

Versarien - Think you know graphene? Think again!Versarien - Think you know graphene? Think again!