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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

ADVANCED SCIENCE NEWS: Yury Gogotsi was a chemist from the very beginning. He feels the excitement of scientific discovery, and cannot imagine doing anything else

Professor Yury Gogotsi, Drexel University, Philadelphia, USA

Yury Gogotsi was a chemist from the very beginning. He feels the excitement of scientific discovery, and cannot imagine doing anything else. It was love at first sight for Yury Gogotsi. 

Gogotsi feels that the greatest recent step in the field of materials science was the discovery of new 2D materials, the “building blocks of the future”. He is very enthusiastic about the use of nanotechnology to generate “new artificial materials, structures and devices from nanoscale building blocks” and the increased application of “modeling, simulation, and machine learning for solving materials science problems”, though he admits concern regarding the unknown effects that artificial intelligence will have on our future lives. He is also conscious of the energy required for computation and the importance of exploiting renewable resources to develop new technologies – ones that reduce energy consumption. “We need revolutionary discoveries here,” he says. “Evolutionary development won’t be enough.”

 
Horizon 2020 NANO2DAY project participants from the Materials Research Center (MRC), Kiev, Ukraine, Alexey Gogotsi and Veronika Zahorodna visited the partner organization Drexel University, Philadelphia, USA, on September-October 2018

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NANO2DAY project participants from the Materials Research Center (MRC), Kiev, Ukraine, Alexey Gogotsi (MRC project leader) and Veronika Zahorodna (early-staged researcher, in the framework of international scientific cooperation on the Horizon 2020 program, visited the partner organization Drexel University, Philadelphia, USA, on September-October 2018 in accordance with the travel plan on the project to perform planned project activities.

 
MRC director Oleksiy Gogotsi at the work meeting in Drexel University, Philadelphia, USA, made a presentation of the company and its activitties in international r&d projects

altDirector of Materials Research Centre (Kiev, Ukraine) Oleksiy Gogotsi  at the work meeting in Drexel University, Philadelphia, USA, made a  presentation of the company and its activitties in international research and development projects. Also Oleksiy Gogotsi presented HORIZON 2020 MSCA RISE Project №777810 NANO2DAY: MULTIFUNCTIONAL POLYMER COMPOSITES DOPED WITH NOVEL 2D NANOPARTICLES FOR ADVANCED APPLICATIONS.

 
Seminar on 2D Materials Beyond Graphene by prof. Zdenek Sofer University of Chemistry and Technology (Prague) at Drexel University, USA, on October 18, 2018

altDuring NANO2DAY project visit  to Drexel University (Philadelphia, USA), director of Materials Research Centre (kiev, Ukraine) Oleksiy Gogotsi met with Assoc. Prof. Zdeněk Sofer from University of Chemistry and Technology, Prague (Chech Republic) and attended his seminar on nanomaterials. Prof. Zdenek Sofer in Drexel University gave an excellent seminar on 2D Materials Beyond Graphene.

 
NANO2DAY project: research scientist Maksym Plakhothyuk, Technical University of Denmark (DTU), visited Ukrainian partner Materials Research Centre, Kiev, Ukraine on September-November 2018

NANO2DAY project Maksym Plakhotnyuk, DTU visited MRC, November 2018Due to the NANO2DAY project under european scientific  research program HORIZON 2020 research scientist  Maksym Plakhothyuk, Technical University of Denmark (DTU), visited Ukrainian partner Materials Research Centre, Kiev, Ukraine on September-November 2018. 

 
Congratulations to Professor Yury Gogotsi who received prestigious Chineese Government Friendship Award, Beijing, Great Hall of the People, September 29, 2018

Yury Gogotsi recevide Friendship Award from Chinas GovernmentChina"s Government Friendship Award ceremony was held in Great Hall of the People, in Beijing on September 29, 2018, the award to the winners were presented by the Vice Premier of China Liu He. The People's Republic of China Government Friendship Award is China's highest award for foreign experts who have made outstanding contributions to the country's economic and social progress.

 
Spray-On Antennas Could Be the Tech Connector of the Future

Invisibly thin MXene antennas can be applied to a variety of substrates and perform better than antenna materials currently used in mobile devices.

Now, researchers at Drexel University have developed a method for creating nearly invisible antennas on almost any surface by literally spraying them on like paint. The antennas are made from a special two-dimensional metallic material called MXene. MXene powder can be dissolved in water to create a paint that is then airbrushed on. In tests, even a layer as thin as just 62 nanometers – thousands of times thinner than a sheet of paper – could communicate effectively. Performance maxed out at just 8 microns, a point at which the spray-on antennas worked just as well as those currently used in mobile devices and wireless routers.

 
Congratulations to professor Yury Gogotsi, professor Rodney S. Ruoff and professor Patrice Simon with being named by Clarivate Analythics among of the 17 most cited and influenced world-class scientists in 2018!

Professor Yury GogotsiThis designation celebrates researchers whose influence is comparable to that of Nobel Prize recipients, as attested by exceptionally high citation records within the Web of Science. 

 
15th YES Annual Meeting: “The Next Generation of Everything” September 13 – 15, 2018

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Yalta European Strategy (YES)  introduced nightcap events for the participants of the 15th YES Annual Meeting to wind down at the end of the first conference day and discuss interesting topics in an informal atmosphere. YES invited leading politicians, opinion makers and business leaders to present their views on modern trends that define the world and Ukraine. The nightcaps were organized in partnership with the U.S. Embassy in Ukraine and America House, International Renaissance Foundation, Ukrainian-Jewish Encounter and the Atlantic Council, Mejlis of the Crimean Tatar people and Ministry of Information Policy of Ukraine, Western NIS Enterprise Fund and Embassy of the Republic of Estonia.

 
2018 IEEE 8th International Conference on Nanomaterials: Applications & Properties, September 09-14, 2018

2018 IEEE International Conference on “Nanomaterials Applications & Properties”At the poster session of the conference Oleksiy Gogotsi presented two poster presentations on advanced nanomaterials for different applications, prepared with colleagues from Drexel University, USA, and Jilin University, China

 
NANO2DAY project participants Oleksiy Gogotsi and Veronika Zahorodna visited Polymer Institute SAS, Bratislava, Slovakia, July-September 2018

altNANO2DAY project participants from Materials Research Centre, Kiev, Ukraine, MRC director and project leader Oleksiy Gogotsi and ESR Veronika Zahorodna are working in Polymer Institute, Slovak Academy of Sciences, Bratislava, Slovakia under the project secondments plan.

 
NANO2DAY project: Professor Maria Omastova, Polymenr Institue Slovak Academy of Science, visited Materials Research Centre, Kiev, Ukraine, July-August 2018

Professor Maria Omastova, Polymer Institute SAV, Bratislava, Slovakia, and Oleksiy Gogotsi, director of Materials Research Centre, Kiev, Ukraine,  July 2018Professor Omastova was acquainted with the activities and research infrastructure of MRC project partner, she held several seminars on polymer composites and talked about the experience and developments of her institute. 

 
The 6th International Conference on Novel Functional Carbon Nanomaterials at the 8th Forum on New Materials (CIMTEC 2018) in Perugia, Italy, June 11-14

Фото Yury Gogotsi.The 6th International Conference “Novel Functional Carbon Nanomaterials”within the 8th Forum on New Materials at CIMTEC 2018 held in Perugia, Italy,  highlighted recent achievements and challenges in the synthesis, structural control and modeling at the meso- and nano-scales of the variety of low-dimensional carbon allotropes including nanodiamonds, diamond-like carbon, fullerenes, nanotubes, graphene and graphene-related structures, as well as high surface area carbon networks, which are promising for a range of emerging applications in energy conversion and storage, water purification, high-speed nanoelectronics, optoelectronics, photonics, quantum information processing, quantum computing, biosensing, drug delivery, medical imaging, thermal management, catalysis, lubrication, etc.

 
1st International Conference on MXenes at Jilin University, Changchun, China

MXene conference 2018The meeting is the first international conference focusing on MXene materals, which is to bring scientists in the two-dimensional materials or energy area to interact and discuss the advances and challenges in various fields.

 
Our Congratulations to Prof. Gogotsi with Receiving an Honorary Doctorate from Kyiv Polytechnic Institute KPIthe National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute"

 Prof. Yury Gogotsi received an honorary doctorate from the National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic InstituteOn May 14th, 2018, Prof. Yury Gogotsi received an honorary doctorate from the National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute (NTUU “KPI”), Kiev, Ukraine.