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Synthesis of two-dimensional transition metal carbides and carbonitrides by immersing select MAX phase powders in hydrofluoric acid, HF

The SEM image captured by Babak Anasori shows MXene particlesMXenes have potential uses in a broad range of energy and electronics applications, including lithium-ion batteries and supercapacitors. The materials' layered structure resembles that of graphene — hence the suffix ene — a two-dimensional sheet of carbon, but its chemistry is more complex and more versatile.

Researches report on the synthesis of two-dimensional transition metal carbides and carbonitrides by immersing select MAX phase powders in hydrofluoric acid, HF. The MAX phases represent a large (>60 members) family of ternary, layered, machinable transition metal carbides, nitrides, and carbonitrides. Has been present evidence for the exfoliation of the following MAX phases.

 

Investigation of Carbon Materials for Use as a Flowable Electrode in Electrochemical Flow Capacitors

Schematic of the operation of an EFC system. Slurries are charged in the flow cellNovel electrical energy storage concept, the electrochemical flow capacitor (EFC), holds much promise for grid-scale energy storage applications.

The EFC combines the principles behind the  operation of flow batteries and supercapacitors, and enables rapid charging/discharging and decoupled energy/power ratings. Electrical charge is stored in a flowable carbon slurry composed of low-cost and abundantly available carbon particles in pH-neutral, aqueous electrolyte.

 

MXene - New Family of 2-D Metal Carbides and Nitrides

Ti3AlC2 forming two OH-terminated MXene layersAn urgent challengecurrently faced by researchers and the public alike is the ability to identify the next generation of sustainable, cost-effective, and energy efficient materials for our everyday use. While searching for new materials for electrical energy storage, a team of Drexel University materials scientists has discovered a new family of two-dimensional compounds proposed to have unique properties that may lead to groundbreaking advances in energy storage technology.

In their paper, the research team recounts their ability to transform three dimensional titanium-aluminum carbide, a typical representative of a family of layered ternary carbides called MAX phases, into a two dimensional structure with greatly different properties. MAX phases, known as ductile and machineable ceramics, have been researched by Prof. Barsoum’s lab for more than a decade and dozens of layered carbides, nitrides and carbonitrides with a variety of properties have been synthesized. However, these ceramics have always been produced as 3-dimensional materials.

 

Pore Size Reduction Increases Energy Stored In Super Capacitors

Computational modeling of carbon supercapacitors
Yury Gogotsi of Drexel University with his co-workers felt the necessity of studying a potential supercapacitor material at the atomic level to analyze certain experimental results. A research team under the supervision of Oak Ridge National Laboratory’s (ORNL) computational physicist Vincent Meunier and computational chemists Jingsong Huang and Bobby Sumpter enabled the analysis at the atomic level.

When you're talking about nanomaterials, however, that eye is pretty much useless unless it's looking through an electron microscope or at a computer visualization. Yet the pits and ridges on a seemingly flat surface—so small they are invisible without such tools—can give the material astonishing abilities. The trick for researchers interested in taking advantage of these abilities lies in understanding and, eventually, predicting how the microscopic topography of a surface can translate into transformative technologies.

 

Supercapasitors: Big Energy Storage in Thin Films

Computational modeling of carbon supercapacitors

Energy storage devices called superapacitors can be recharged many more times than batteries, but the total amount of energy they can store is limited. This means that the devices are useful for providing intense bursts of power to supplement batteries but less so for applications that require steady power over a long period, such as running a laptop or an engine.

Now researchers at Drexel University in Philadelphia have demonstrated that it's possible to use techniques borrowed from the chip-making industry to make thin-film carbon ultracapacitors that store three times as much energy by volume as conventional ultracapacitor materials. While that is not as much as batteries, the thin-film ultracapacitors could operate without ever being replaced.

 

Materials for electrochemical capacitors

Electrochemical capacitors, also called supercapacitors, store energy using either ion adsorption (electrochemical double layer capacitors) or fast surface redox reactions (pseudo-capacitors). They can complement or replace batteries in electrical energy storage and harvesting applications, when high power delivery or uptake is needed. A notable improvement in performance has been achieved through recent advances in understanding charge storage mechanisms and the development of advanced nanostructured materials.

The discovery that ion desolvation occurs in pores smaller than the solvated ions has led to higher capacitance for electroche.

 



News from MRC.ORG.UA

Triangle Talks with Yury Gogotsi

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Yury Gogotsi is a researcher in the Drexel University Nanomaterials Group. He and his colleagues discovered a series of novel materials known as MXenes. 

 
Yury Gogotsi is the most influential scientist of modern Ukraine

altThe life of Yury Gogotsi is a constant back and forth between the top laboratories in the world, writing articles in the best scientific journals and research materials that can change the world around them. 

 
Professor Yury Gogotsi , Drexel University, USA, received an Honorary Doctorate from Frantsevich Institute for Problems of Materials Science, National Academy of Science of Ukraine, Kiev, Ukraine, June 20, 2017.

Deputy Directors of IPMS NAS professors Dr. Ragulya, Dr. Baglyuk, Mr. Zavorotnyi, Honorary Professor of IPMS NASU Yury Gogotsi,  Scientific Secretary Dr. Kartuzov and Dr. Firstov Professor Yury Gogotsi , Drexel University, USA,  received an Honorary Doctorate from Frantsevich Institute for Problems of Materials Science, National Academy of Science of Ukraine.

 
Professor Yury Gogotsi was speaking about nanotechnology in energy storage at the World Science Festival 2017

Professor Yury Gogotsi at World Science Festival 2017Join world-class nanoscientists and environmental leaders to explore how the capacity to harness molecules and atoms is accelerating spectacular inventions — including light-weight “wonder materials,” vital energy-storage technologies, and new sources of renewable energy — which promise to redefine the very future of energy.

 
MXenes are at the forefront of 2D materials research

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Research of 2D MXenes is prominently featured in an article in Chemical & Engineering News - bulletin of the American Chemical Society that goes in hard copy to more than 150,000 subscribers. No doubt, MXenes are at the forefront of 2D materials research.

 
IDEATION Seminars: A New Platform for Innovation Management, Promotion, Licensing, Technology Transfer and Commercialization, June 7 at 14:30, KPI, Kyiv

altSpeakers:  Victor Korsun and Douglas Graham

 
Nano Iguana became a 1st place winner at 2017 MRS Science as Art Competition

Entry Nano Iguana became a 1st place winner at Science as Art Competition 2017: Nano-anatase (TiO2) crystals decorating graphene-like carbon, fabricated by oxidizing 2d Ti3C2 MXene powder, presented by A. J. Drexel Nanotechnology Institute and Department of Materials Science  and Engineering, Drexel University, USAResearch team from Drexel University lead by professor Yury Gogotsi produced an award-wining entry and became the 1st place winner in Science as Art competition at 2017 MRS Spring meeting in Phoenix.

 
1st Africa Energy Materials conference, 28 – 31 March 2017, Pretoria, South Africa

1st Africa Energy Materials conference On the first day of the conference, on March 28, the conference participants had an opportunity to attend a plenary lecture "Two-Dimensional Materials for High Rate and High-energy Density Storage" by invited plenary speaker professor Yury Gogotsi, Distinguished University Professor and Trustee Chair of Materials Science and Engineering at Drexel University, and Director of the A.J. Drexel Nanomaterials Institute 

 
Workshop “Nanomaterials – based innovative engineering solution to ensure sustainable safeguard to indoor air “ NANOGUARD2AR 27-28 February, Lisbon, Portugal

altThe goal of the workshop is to attract the most recognized academic experts in the field of Innovative Nanomaterials for Environmental Application to share their knowledge and expertise on nanomaterials, nanoengineering and green building concepts.

 
MATERIAL WITNESSES — RESEARCHERS AROUND THE WORLD ARE DELVING INTO DREXEL’S 2D MXENE

Researchers from the A.J. Drexel Nanomaterials Institute have been studying MXene for nearly half a decade. (L-R): Olekisy Gogotsi (Director of Materials Research Center, Ukraine), Gabriel Scull, Babak Anasori, Mohamed Alhabeb, Yury Gogotsi.

More than twenty 2D carbides, nitrides and carbonitrides of transition metals (MXenes) have been synthesized and studied, and dozens more predicted to exist. Highly electrically conductive MXenes show promise in electrical energy storage, electromagnetic interference shielding, electrocatalysis, plasmonics and other applications.

 
Prof. Gogotsi has been included in the list of ISI Highly Cited researchers for the 3rd year in the row

altProf. Gogotsi has been named among Highly Cited Researchers 2016, representing worlds most influential scientific minds

 
Appointment ceremony of Honorary professorship for prof. Yury Gogotsi, Jilin University, Changchun, China on October 20, 2016

Honorary professor of Jilin University Yury Gogotsi  and Li Yuanyuan, President of Jilin University, academician of the Chinese Academy of Engineering

The official appointment ceremony of Honorary professorship for Dr. Yury Gogotsi took place in a ceremonial atmosphere at Jilin University, Changchun, Jilin Province, China on October 20, 2016.

 
12th IUPAC International Conference on Novel Materials and their Synthesis (NMS-XII)

12th IUPAC International Conference on Novel Materials and their Synthesis (NMS-XII)12th IUPAC International Conference on Novel Materials and their Synthesis (NMS-XII), is held during 14-19 October, 2016 at Hunan Agriculture University together with Nanjing Tech University, Fudan University and University of Technology, Sydney.

 
Cleaning up electromagnetic pollution by containing the emissions with a thin coating of a nanomaterial called MXene

MXene is a nanomaterial that is both thin and light, but also has the unique ability to block and absorb electromagnetic radiation, which makes it the perfect for use as shielding in electronics devices.

 According to the authors, when electromagnetic waves come in contact with MXene, some are immediately reflected from its surface, while others pass through the surface but they lose energy amidst the material’s atomically thin layers.

 
Beijing University of Chemical Technology awarded prof. Yury Gogotsi, Drexel University (USA) the title of Honorary Professor

Honorary Professor appointment ceremony at the Beijing University of Chemical TechnologyBeijing University of Chemical Technology have decided to award prof. Yury Gogotsi, Drexel University (USA) the title of Honorary Professor based on his distinguished academic accomplishments.