Liu C.,Nanotek Instruments, Inc. |
Liu C.,Dalian University of Technology |
Yu Z.,Angstron Materials, Inc |
Neff D.,Nanotek Instruments, Inc. |
And 2 more authors.
Nano Letters | Year: 2010
A supercapacitor with graphene-based electrodes was found to exhibit a specific energy density of 85.6 Wh/kg at room temperature and 136 Wh/kg at 80 °C (all based on the total electrode weight), measured at a current density of 1 A/g. These energy density values are comparable to that of the Ni metal hydride battery, but the supercapacitor can be charged or discharged in seconds or minutes. The key to success was the ability to make full utilization of the highest intrinsic surface capacitance and specific surface area of single-layer graphene by preparing curved graphene sheets that will not restack face-to-face. The curved morphology enables the formation of mesopores accessible to and wettable by environmentally benign ionic liquids capable of operating at a voltage >4 V. © 2010 American Chemical Society.
Jang B.Z.,Nanotek Instruments, Inc. |
Liu C.,Nanotek Instruments, Inc. |
Neff D.,Nanotek Instruments, Inc. |
Yu Z.,Angstron Materials, Inc |
And 4 more authors.
Nano Letters | Year: 2011
Herein reported is a fundamentally new strategy for the design of high-power and high energy-density devices. This approach is based on the exchange of lithium ions between the surfaces (not the bulk) of two nanostructured electrodes, completely obviating the need for lithium intercalation or deintercalation. In both electrodes, massive graphene surfaces in direct contact with liquid electrolyte are capable of rapidly and reversibly capturing lithium ions through surface adsorption and/or surface redox reaction. These devices, based on unoptimized materials and configuration, are already capable of storing an energy density of 160 Wh/kgcell, which is 30 times higher than that (5 Wh/kgcell) of conventional symmetric supercapacitors and comparable to that of Li-ion batteries. They are also capable of delivering a power density of 100 kW/kgcell, which is 10 times higher than that (10 kW/kgcell) of supercapacitors and 100 times higher than that (1 kW/kgcell) of Li-ion batteries. © 2011 American Chemical Society.
Agency: National Science Foundation | Branch: | Program: STTR | Phase: Phase II | Award Amount: 500.00K | Year: 2011
This Small Business Technology Transfer (STTR) Phase II project aims to develop a method for rapid, direct and large-scale production of pristine nano-graphene platelets (NGPs). A combined molecular dynamic, macroscopic modeling and experimental approach will be used to (1) further improve the understanding of the underlying principles behind effective peeling of single-layer graphene sheets from graphite particles in selected liquid mediums, and (2) to clearly determine the most critical processing conditions that govern the graphene production rate in a continuous processing reactor. The broader/commercial impacts of this project will be the potential to offer a cost-effective method to produce pristine nano-graphene in large quantities. NGPs are of exceptional scientific and technological significance. The ability to produce large-volume pristine nano-graphene will have a profound impact on the evolution of nano-graphene science and technology. Highly conductive graphene may find practical applications in transparent and conductive coating, supercapacitor, battery electrode, fuel cell bipolar plates, and conductive nanocomposite.
Agency: National Science Foundation | Branch: | Program: STTR | Phase: Phase I | Award Amount: 150.00K | Year: 2009
This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This Small Business Technology Transfer Research Phase I project is directed toward the rapid, large-scale production of pristine nano graphene platelets (NGPs) ? an emerging class of nano materials expected to have a revolutionary impact on nanotechnology. NGPs exhibit exceptional properties as do carbon nanotubes (CNTs), but can be mass-produced at much lower costs. NGPs exhibit the highest intrinsic strength and highest thermal conductivity of the existing materials. Highly conductive graphene will find practical applications in nanoelectronics, transparent and conductive coating (e.g., as a replacement for ITO glass), supercapacitor, battery electrode, fuel cell bipolar plates, thermal interface materials, and conductive nanocomposite. The total potential market size for conductive nano fillers/nanocomposites is forecast to reach $5 billion ($550M for automotive components alone) by 2013.
Beech R.,Angstron Materials, Inc
Nanotechnology Law and Business | Year: 2011
Graphene is no longer just a topic for physicists and chemists to discuss at conferences. The material is making the transition from research journals to commercial applications. The speed of this transition is driven by its unique properties and the ability of manufactures to provide materials in large volumes. This article discusses the history of graphene and its applications, and compares graphene to other nanomaterials. Graphenes competitors include carbon nanotubes and established materials such as carbon black, carbon fibers, nano clays, and glass fibers. The article also discusses a new class of nanomaterial now commonly referred to as "nano graphene platelets.".
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2011
The primary objective of this Phase-I research is to demonstrate the technical feasibility and commercial viability of a new generation of high-efficiency bi-functional electro-catalysts for use in the Li-air cathode. The catalyst is based on nano-scaled noble metal and/or transition metal oxide particles uniformly dispersed on the surfaces of nano graphene sheets. The specific goals of Phase-I tasks are to: (1) Demonstrate that nano particles of noble metals (e.g., Au and Pt particles with a diameter & lt; 5 nm) and transition metal oxides (e.g., Co3O4 and Mn3O4 particles with a diameter & lt; 10 nm) can be synthesized and uniformly dispersed on graphene surfaces. (2) Identify an initial set of procedures and conditions for synthesizing these catalyst nano particle-decorated graphene composites. (3) Evaluate the electro-chemical performance of these composite electro-catalysts and down-select the most viable electro-catalysts for further studies in Phase II. A well-configured Li-O2 battery can achieve an energy density of 1-3 kWh/kg, 5-15 times greater than that of the state-of-the-art Li-ion battery. However, several technical barriers have hitherto impeded the practical use of Li-air cells. The proposed research will overcome three of the major technical barriers (low achievable energy density, poor cycle efficiency, and low power density), which are related to poor catalyst effectiveness, low catalyst utilization rate, and large lithium oxide or peroxide sizes at the cathode. Commercial Applications and Other Benefits: The proposed technology solves long-standing barriers that have prevented the more widespread implementation of Li-air batteries for EV and HEV applications. This technology will further enhance the acceptance of Li batteries by dramatically improving cycle life, cycle and energy efficiency, electrode functionality, and power output. This breakthrough electrode technology has the capability to offer EVs a mileage range competitive with the mileage range achieved with gasoline engines. Commercialization of this technology will leverage the transition from gasoline-powered vehicles to EVs, provide a strong foundation for Li battery production in the US, and position the US to take the lead in accelerating the emergence of a vibrant EV industry
Agency: NSF | Branch: Standard Grant | Program: | Phase: STTR PHASE II | Award Amount: 500.00K | Year: 2011
This Small Business Technology Transfer (STTR) Phase II project aims to develop a method for rapid, direct and large-scale production of pristine nano-graphene platelets (NGPs). A combined molecular dynamic, macroscopic modeling and experimental approach will be used to (1) further improve the understanding of the underlying principles behind effective peeling of single-layer graphene sheets from graphite particles in selected liquid mediums, and (2) to clearly determine the most critical processing conditions that govern the graphene production rate in a continuous processing reactor.
The broader/commercial impacts of this project will be the potential to offer a cost-effective method to produce pristine nano-graphene in large quantities. NGPs are of exceptional scientific and technological significance. The ability to produce large-volume pristine nano-graphene will have a profound impact on the evolution of nano-graphene science and technology. Highly conductive graphene may find practical applications in transparent and conductive coating, supercapacitor, battery electrode, fuel cell bipolar plates, and conductive nanocomposite.
News Article | January 12, 2015
Angstron Materials is very proud to be featured on the show Trending Today on the Discovery Channel. This show, airing Thursday, January 29 at 7:30 AM EST, will feature interviews with Angstron’s CEO, Dr. Bor Jang along with three other Angstron employees. The segment will touch on select portions of Angstron’s technologies and capabilities. Special emphasis will be placed on the history and background of the company, on graphene based thermal management materials, and on energy storage opportunities for graphene materials. Future featurettes will include segments on graphene nanocomposites and other related topics so check back to learn about these technologies as well! Trending Today features experts, front-line industry advancements, innovative technologies, product solutions, and trends in health, wellness, culinary, cuisine, luxury, leisure, recreation, manufacturing and more. A series that above all, presents an informative perspective on consumer and professional product and service trends. Angstron Materials, founded in 2007, is a leading manufacturer of graphene and graphene oxide materials. Having begun producing graphene materials in the late 2000’s, Angstron now has one of the largest graphene and graphene oxide production capacities in the world; approximately 300 metric tons per year. Along with the mass production of the raw graphene materials, Angstron is dedicated to using their expertise in graphene materials to develop other advanced materials and solutions such as nanocomposite masterbatches, energy storage solutions, thermal management and thermal interface materials, transparent conductive films, and anti-corrosion and barrier coatings and paints. The Angstron team is led by Dr. Bor Jang, a pioneer in advancing the field of nano-graphene platelets. In addition to NGPs, Dr. Jang is a leading expert in the research and development of low-cost carbon nanomaterials, batteries, supercapacitors, and fuel cells with nearly 100 inventions to his credit and close to 90 patents. For more information on our product offerings, please click here. We are always interested in new and exciting uses for our graphene materials. With graphene’s high thermal and electrical conductivity, its inherent impermeability to gases, its mechanical properties, and its ability to be incorporated into other materials, there are a huge number of applications for this material. With hundreds of customers in over 35 countries, we, at Angstron, are dedicated to helping our customers utilize graphene in their application and to bringing graphene and graphene-enhanced products into commercial and industrial applications. Call us at 1-937-331-9884 or email us here to learn more or suggest your application.
News Article | October 27, 2014
Starting November, 2014, Angstron Materials, Inc., a leading graphene manufacturer, is very pleased to be able to offer masterbatches of graphene enhanced polymers for a wide range of applications. Graphene loaded nanocomposites are able to offer superior mechanical properties, enhanced electrical and thermal conductivity, improved dimensional stability, higher resistance to micro-cracking, and increased barrier properties above the base polymer. Furthermore, through Angstron’s extensive knowledge in graphene enhanced systems, we are able to identify the optimal graphene enhanced formulation to achieve the end users requirements. Angstron can provide the graphene masterbatch material in a pellet form or as a strand for use in FDM 3-D printing. While graphene has been known to offer significant performance improvements to many polymer systems, many end users do not have the expertise or equipment necessary to properly disperse the graphene into polymer systems. Angstron has at its disposal, a team of composite scientists and engineers with close to 100 years of combined experience in composite formulation, manufacturing, and application. This experience pairs perfectly with the world class team of researchers, engineers, and technicians dedicated to producing, optimizing, and utilizing Angstron’s graphene materials in a wide range of applications. Using in-house compounding equipment, Angstron is able to masterbatch material to order in a timely manner. Furthermore, through our composite industry contacts, we are able to rapidly scale up nanocomposite compounding to meet industrial demand. Angstron Materials continues to develop and roll out new graphene and graphene enhanced products. Already a world leader in the large scale production of graphene, Angstron is dedicated to identifying and addressing real world applications where graphene offers a strategic and economic advantage over traditional solutions. Angstron’s main product thrusts include graphene and graphene oxide mass production, nanocomposite masterbatches, energy storage solutions, thermal management and thermal interface materials, along with anti-corrosion and barrier coatings and paints. For more information, please see our product page or contact us.