graphene – TechConnect Briefs

Exploring graphene to enhance the performance of hybrid solar photovoltaic thermal collectors

Anderson M., Cauchon A., Icarus RT, Inc., US

A graphene layer between the polymer backsheet of a photovoltaic (PV) panel and an aluminum heat exchanger designed to extract heat from a PV panel is explored. The thermal properties of graphene are well-documented, and [...]

Novel Graphene Supercapacitor Structure Design for UAV Power Storage

Kim J., Rivas A., Wu S., Martinez V., Terroza K., Karthikeyan D., Contreras F., Castro J., Botello E., Pandit R., Dobbs S., Yu Z., California State Polytechnic University, Pomona, US

Supercapacitors are getting significant attention in recent years due to their quick charge/discharge capabilities, long cycle lives and are environmentally friendly. Supercapacitors can provide necessary power in short bursts. Aiming to reduce the weight and [...]

On the Ideal Diamagnetism of Composite Graphene and Graphite Nanostructures

Rzhevskii A., Chahid S., Dulal R., Teknowijoyo S., Gulian A., Thermo Fisher Scientific, US

Graphite and its derivatives such as graphene have demonstrated many unique properties that are still un- der intense exploration. In particular, these properties are important for microelectronics applications. In our case it was ideal diamagnetism [...]

Impact of Coal-Borne Impurities on Coal-Derived Graphene Quantum Dots

Azenkeng A., Stanislowski N.E., Laumb J.D., University of North Dakota Energy & Environmental Research Center, US

The impact of coal-borne impurities on coal-derived graphene quantum dots (GQDs) has been investigated on four U.S. coal ranks: lignite, subbituminous, bituminous, and anthracite. Preliminary characterization of the GQDs has been done using ultraviolet-visible spectroscopy [...]

Fabrication of a Lower Weight, All 3D Printed Graphene Supercapacitor

Yu Z., Dobbs S., Anderson K., Sun P., Zhu B., Nair A., Wu S., California State Polytechnic University, Pomona, US

Graphene is under intensive study for energy storage devices, such as batteries and supercapacitors, due to its energy density and ability to recharge. These properties make graphene well suited for electric powered UAVs with the [...]

Mechanical Properties of 3D Printed PLA Specimens with Various Infill Shapes and Volumes

Subeshan B., Rahman M.M., Asmatulu E., Arifa K., Wichita State University, US

Traditional manufacturing methods contain removing excess materials by trimming, cutting and sanding to get the projected shapes; however, additive manufacturing contain direct manufacturing of the objects utilizing computer assisted design model by adding a layer [...]

Recycling of Graphite Waste into High Quality Graphene Products

Ahmed T.M., Rahman M.M., Asmatulu E., Wichita State University, US

Graphite is a stack of carbon layers where carbon atoms form hexagons in a honeycomb structure. Graphene on the other hand is a single atom thick layer which offers unique physical, chemical and biological properties [...]

Growth of Carbon Nanotubes on Graphene as Efficient Air–cathode for Highly H2O2 -producing Microbial Fuel Cell

Han S., Zhou C., Kansas State University, US

An efficient highly conductive three-dimensional (3D) air-cathode manufactured by growth of carbon nanotubes (CNT s) on graphene sheets (GNS) for the improvement of H2O2-producing microbial fuel cell (MFC) is reported. 3D architectured GNS-CNT s hybrid [...]

A platform for extremely sensitive gas sensing: 2D materials on silicon carbide

Eriksson J., Rodner M., Yakimova R., Spetz A.L., Linkoping University, SE

2D materials offer a unique platform for sensing with extremely high sensitivity, since even minimal chemical interaction causes noticeable changes in the electronic state. An area where extreme sensitivity is particularly interesting is in the [...]

Graphene Functionalized Mesoporous Mn and Ti Oxides for Supercapacitors

Houck J., Amar V., Shende A., Shende R., Shende A., Shende R., South Dakota School of Mines and Technology, US

In this investigation, several mesoporous nanocomposites such as TiO2/MnO2, TiO2/Mn2O3, TiO2/MnO2/Mn2O3 and TiO2/MnO2/Mn2O3/MnTiO3 were synthesized using the pluronic 123 templating assisted sol-gel method. To prepare these nanocomposites, sol-A with Ti precursor and sol-B containing Mn [...]