biotek
28 Mar 2015
Headline - AGM set to gear-up production for Graphine Light Bulb - I wonder?
bonzoful
20 Feb 2015
queries Keen on potential of graphene. Two points deter me from investing in Applied Graphene, expressed here as questions. When is breakeven expected? What advantage does Applied Graphene have over Cambridge Nanosystems?
sage in the hills
20 Feb 2015
Batteries again ! .. is AGM on the case ? An engineer has made a breakthrough in rechargeable battery applications. Gurpreet Singh, assistant professor of mechanical and nuclear engineering at Kansas State University, and his student researchers are the first to demonstrate that a composite paper - made of interleaved molybdenum disulfide and graphene nanosheets - can be both an active material to efficiently store sodium atoms and a flexible current collector. The newly developed composite paper can be used as a negative electrode in sodium-ion batteries."Most negative electrodes for sodium-ion batteries use materials that undergo an 'alloying' reaction with sodium," Singh said. "These materials can swell as much as 400 to 500 percent as the battery is charged and discharged, which may result in mechanical damage and loss of electrical contact with the current collector.""Molybdenum disulfide, the major constituent of the paper electrode, offers a new kind of chemistry with sodium ions, which is a combination of intercalation and a conversion-type reaction," Singh said. "The paper electrode offers stable charge capacity of 230 mAh.g-1, with respect to total electrode weight. Further, the interleaved and porous structure of the paper electrode offers smooth channels for sodium to diffuse in and out as the cell is charged and discharged quickly. This design also eliminates the polymeric binders and copper current collector foil used in a traditional battery electrode."The research appears in the latest issue of the journal ACS Nano in the article "MoS2/graphene composite paper for sodium-ion battery electrodes."For the last two years the researchers have been developing new methods for quick and cost-effective synthesis of atomically thin two-dimensional materials—graphene, molybdenum and tungsten disulfide—in gram quantities, particularly for rechargeable battery applications.For the latest research, the engineers created a large-area composite paper that consisted of acid-treated layered molybdenum disulfide and chemically modified graphene in an interleaved structured. The research marks the first time that such a flexible paper electrode was used in a sodium-ion battery as an anode that operates at room temperature. Most commercial sodium-sulfur batteries operate close to 300 degrees Celsius, Singh said.Singh said the research is important for two reasons:1. Synthesis of large quantities of single or few-layer-thick 2-D materials is crucial to understanding the true commercial potential of materials such as transition metal dichalcogenides, or TMD, and graphene.2. Fundamental understanding of how sodium is stored in a layered material through mechanisms other than the conventional intercalation and alloying reaction. In addition, using graphene as the flexible support and current collector is crucial for eliminating the copper foil and making lighter and bendable rechargeable batteries. In contrast to lithium, sodium supplies are essentially unlimited and the batteries are expected to be a lot cheaper."From the synthesis point of view, we have shown that certain transition metal dichalcogenides can be exfoliated in strong acids," Singh said. "This method should allow synthesis of gram quantities of few-layer-thick molybdenum disulfide sheets, which is very crucial for applications such as flexible batteries, supercapacitors, and polymer composites. For such applications, TMD flakes that are a few atoms thick are sufficient. Very high-quality single-layer flakes are not a necessity."The researchers are working to commercialize the technology, with assistance from the university's Institute of Commercialization. They also are exploring lithium and sodium storage in other nanomaterials. The bottom image shows a self-standing molybdenum disulfide/graphene composite paper electrode and the top image highlights its layered structure. Source: [link]
sage in the hills
20 Feb 2015
Green Car Congress High-capacity tungsten disulfide/graphene nanocomposite anodes for Na-ion batteries27 February 2014A team from the University of Wollongong (Australia) and the University of Technology, Sydney reported the successful synthesis by a simple hydrothermal approach of high-capacity WS2 (tungsten disulfide)@graphene nanocomposite anodes for sodium-ion batteries. Their paper is published in the RSC journal Chemical Communications.Schematic diagram of the WS2@graphene nanocomposites. Su et al. Click to enlarge.XRD, FESEM, and TEM analyses of the prepared material showed that the WS2 nanocrystals were homogeneously distributed on the graphene nanosheets.Anodes were prepared by dispersing 70 wt. % as-prepared materials, 20 wt. % acetylene carbon black, and 10 wt. % PVDF binder in N-methyl-2-pyrrolidone (NMP) to form a slurry. The resultant slurry was pasted onto copper foil using a doctor blade and dried in a vacuum oven for 12 h, which was followed by pressing at 200 kg cm-2. The typical loading of each electrode was approximately 1.2 mg cm-2.Electrochemical measurements were carried out using two-electrode coin cells (CR2032) with Na metal as reference and counter electrode and glass microfiber as the separator.… the WS2@graphene nanocomposite showed its highly reactive nature towards sodium storage. It demonstrated a high reversible specific capacity of about 594 mA h g-1, excellent cyclability, and a good high rate performance, which could be ascribed to the highly conductive graphene matrix and the unique 3D architecture of the nanocomposite. WS2@graphene nanocomposite is a promising high performance anode material for Na-ion batteries.—Su et al.Is AGM involved in this ????? .......SAGE
Geoff
04 Feb 2015
I am losing the will to live with this one
sage in the hills
22 Dec 2014
New Convincing Effective CV to follow Will be interesting to se who it is in this well paid market leading jobSAGE
sage in the hills
22 Dec 2014
Well, well, SAGE questiops .. it happens RNS this morning.Well done SAGESAGE
biotek
22 Dec 2014
BRB1 - no I've got some, but very disappointed as well. Hopefully the cash bleed will reduce now Claudio has gone, as obviously he achieved no sales during his time at AGM.
sage in the hills
19 Dec 2014
Dr Claudio Marinelli, Business Development Director I regard this role as crucial ... is this CV the most effective we have available for the today and future markets ????Dr Claudio Marinelli, Business Development DirectorClaudio has extensive experience in the commercialisation of emerging technologies, including product development, marketing and business strategy. He was Open Innovation Director and later Business Management Director for Nokia Research between 2008 and 2012 where he was responsible for the strategic and operational oversight of the portfolio for research and development collaboration at 13 Nokia sites. He also co-led Nokia’s Impact and Tech Transfer work packages within the European Commission Future and Emerging Technologies' Graphene Flagship proposal, a ten year, €1 billion project with over 80 industrial and academic partners. Prior to joining Nokia, Claudio was Entrepreneur-in-Residence at the University of Cambridge for Advance Nanotech, a US seed investment fund specialising in academic spin-offs, between 2006 and 2007. From 2001 to 2002 Claudio was Senior Device Engineer at Luxnet Corp, a California based start-up company supplying optoelectronic and telecommunication components. Other previous roles include Senior Research Associate in photonics at the engineering department of the University of Cambridge. Claudio holds a Laurea degree in physics from the University of Trieste, Italy, a PhD in Electronic Engineering from the University of Bristol and an MBA from the Judge Business School at the University of Cambridge. Claudio joined the Group in July 2013 and is responsible for customer engagement, sales, product and application development.SAGE
sage in the hills
19 Dec 2014
This is the link i meant to post .... [link] AGMSAGE
sage in the hills
19 Dec 2014
14p range in the trades today ... clearly a good buying opportunity at the moment ?..... .... any offers of discussion on this point ?SAGE
sage in the hills
19 Dec 2014
Great British Technology HM gov Worth a read, and is a highly respected source ....([link] or rather,Great British Technology HM gov and refers to AGMSAGE
sage in the hills
07 Dec 2014
Telegraph Sunday 7thdec Meet the first lady of graphene, turning harmful gases into the wonder stuffCatharina Paukner is building a supersized graphene factory in Cambridge that can turn methane from landfill - or even cows - into modern-day black gold"It’s mind-blowing to think that not long ago, it was only possible to make a ladleful of graphene in a year. Now I can make enough to fill a whole building" Rebecca Burn-Callander, Enterprise Editor3:12PM GMT 06 Dec 2014 9 CommentsThe birthplace of graphene – the one-atom-thick carbon – is Manchester University, where it was created by two physicists. But Cambridge could become the adopted home of the so-called wonder-material.A vast new facility that can make up to five tonnes of the ultra-valuable black dust each year is being built in the city and is due to open in 2015.Cambridge Nanosystems, a university spin-out, led by chief scientist Catharina Paukner, 30, has built the factory with the help of a £500,000 grant from the Technology Strategy Board.“It’s mind-blowing to think that not long ago, it was only possible to make a ladleful in a year. Now we can make enough to fill a whole building,” she tells The Sunday Telegraph. “And we have the capacity to increase that 100-fold.”Graphene is one of the most interesting inventions of modern times. Stronger than steel, yet light, the material conducts electricity and heat. It has been used for a wide variety of applications, from strengthening Novak Djokovic’s tennis racket to building semiconductors.Related Articles Graphene maker 'will stay British' 01 Jul 2014Graphene used to create more pleasurable condoms 20 Nov 2013Graphene: the 'miracle material' 19 Aug 2013Marshmallows get the gourmet treatment Sponsored by FedExPaukner’s two-year-old company is leading the charge to commercialise graphene. She and fellow Cambridge alumni Krzysztof Koziol have devised a way to make the material in large volumes, without compromising on quality.Unlike existing graphene manufacturers that use graphite as their source material, or use a thermal process to bake it out of methane, Cambridge Nanosystems uses a patented plasma system to turn biogas into graphene.This gas can either come out of the pipeline – the same natural gas that is pumped into our houses – or using waste gas.“In America, they are starting to capture methane from cows and using it to burn for heating,” says Paukner. “But we could go one better, and convert all those methane hydrocarbons into a high-value product.”Graphene, in its raw state, is a fine black powderIf the idea of strapping giant gas canisters to cows seems a little far-fetched, Cambridge Nanosystems has found a more immediate source of methane.“Landfill sites produce a lot of methane, which is a greenhouse gas,” she explains. “You can’t just let it into the atmosphere, so companies spend a lot of money flaring it off. This produces carbon dioxide, which is also bad for the planet. If we take that gas, we can make graphene, with water being the only waste product.”Cambridge Nanosystems is running a project at a biogas plant to prove it can create graphene using this process reliably and consistently.Cambridge Nanosystems was spun out to build equipment for the creation of graphene, but Paukner and her co-founders soon realised that graphene itself had the greatest potential.“The possibilities are endless,” says Paukner. “I’m passionate about applications for the building industry. Imagine radiators that you can spray on any surface. We can create a kind of black ink using graphene that can be painted on to a wall or a floor.”attaching an electrical current to the painted area, conductive graphene heats immediately, warming the room. Plumbers would not have to install radiators, just a paintbrush, she explains.The radiators of the future will be painted on graphene, less than 1mm thickKoziol is more excited about 3D printing with graphene. He has built a 3D printer that c
biotek
05 Dec 2014
Er -Wiz-bang - I'ii put you down as a short seller then....
Wiz-bang
04 Dec 2014
Re: Too ..... something .... Hope they don't go bust.... !!!!
