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.

Big Energy Storage in Thin Films

Audio »

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.

These charge-storage films could be fabricated directly onto RFID chips and the chips used in digital watches, where they would take up less space than a conventional battery. They could also be fabricated on the backside of solar cells in both portable devices and rooftop installations, to store power generated during the day for use after sundown. The materials have been licensed by Pennsylvania startup Y-Carbon.

An ultracapacitor is "an electrical energy source that has virtually unlimited lifetime," says Yury Gogotsi, professor of materials science and engineering at Drexel University in Philadelphia, who led the development of the thin-film ultracapacitors. "It will live longer than any electronic device and never needs to be replaced." While batteries store and release energy in the form of chemical reactions, which cause them to degrade over time, ultracapacitors work by transferring surface charges. This means they can charge and discharge rapidly, and because the electrode materials aren't involved in any chemical reactions, they can be cycled hundreds of thousands of times. Researchers have begun developing thin-film ultracapacitor materials but have had difficulty getting high enough total energy storage using practical fabrication methods, says Gogotsi.

Gogotsi's group uses a high-vacuum method called chemical vapor deposition to create thin films of metal carbides such as titanium carbide on the surface of a silicon wafer. The films are then chlorinated to remove the titanium, leaving behind a porous film of carbon. In each place where a titanium atom was, a small pore is left behind. "The film is like a molecular sponge, where the size of each pore is equal to the size of a single ion," says Gogotsi. This matching means that when used as the charge-storage material in an ultracapacitor, the carbon films can accumulate a large amount of total surface charge. The Drexel researchers complete the device by adding metal electrodes to either surface to carry current into and out of the device and adding a liquid electrolyte to carry the charges. They found that the performance of the device is best when the carbon material is about 50 micrometers thick, about the same as the width of a human hair.

The Drexel researchers first developed this ultracapacitor material a few years ago; today in the journal Science they report the first demonstration of thin films made from it. Conventional ultracapacitors are made from powdered activated carbon. These powders can't be used to make large, thin films because they won't stick to the surface. Other groups have developed printable thin-film ultracapacitors based on carbon nanotubes; Gogotsi says his devices can store more charge.

Gogotsi says there is, in theory, no limit to the size of the films that could be made using these methods, which are used by the solar industry and display industries to make panels as large as nine square meters. Because the carbon films are thin and can be made at temperatures as low as 200 ?C, it might be possible to integrate them with flexible electronics.

Source: http://www.technologyreview.com/

RELATED ITEMS:

Group of american researchers from Drexel University created unique supercapacitors »

Pore Size Reduction Increases Energy Stored In Super Capacitors »

11th International Conference on Frontiers of Polymers and Advanced Materials 22 - 27 May 2011 »

AABC Europe. ECCAP Symposium Large EC Capacitor Technology and Application, June 6-10, 2011 Germany »

 

News from MRC.ORG.UA

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

Фото Yury Gogotsi.The 6th International Conference “Novel Functional Carbon Nanomaterials” 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.

 
H2020-MSCA-RISE Nano2Day Kick-off project meeting, Academic Centre of University of Latvia, Riga, 10-11 May 2018

altH2020-MSCA-RISE project „Multifunctional polymer composites doped with novel 2D nanoparticles for advanced applications NANO2DAY” started on May 1, 2018. It is aimed to develop novel multifunctional composites with outstanding electronic and mechanical properties by incorporation of novel MXene nanosheets into polymer matrixes.

 
Materials Research Center team visited the Training " on "How to write a successful proposal in Horizon 2020" at National Aviation University of Ukraine" as part of the NAU Info Day

horizon2020 семінарOn February 14, 2018, Materials Research Center team visited the Training " on "How to write a successful proposal in Horizon 2020" at National Aviation University of Ukraine"  as part of the NAU Info Day.

 
Paper on Rheological Characteristics of 2D Titanium Carbide (MXene) Dispersions: A Guide for Processing MXenes

Processing guidelines for the fabrication of MXene films, coatings, and fibers have been established based on the rheological propertiesProcessing guidelines for the fabrication of MXene films, coatings, and fibers have been established based on the rheological properties.

 
Professor Yury Gogotsi will give a lecture on 2D materials MXenes in Stanford University

altProfessor Yury Gogotsi will give a lecture on 2D materials MXenes on MSE winter Colloquim in Materials Science and Engineering Department, Stanford University. 

 
MXene is one of the most sensitive gas sensors ever reported

MXene gas sensorsMXene is one of the most sensitive gas sensors ever reported that sniff out chemicals in the air to warn us about everything from fires to carbon monoxide to drunk drivers to explosive devices hidden in luggage have improved so much that they can even detect diseases on a person’s breath. Researchers from Drexel University and the Korea Advanced Institute of Science and Technology have made a discovery that could make our best “chemical noses” even more sensitive.

 
Professor Yury Gogotsi, Drexel University, USA, gave a plenary lecture at the 2018 Energy Future Conference in Sydney, Australia, 5-7 February 2018

Professor Gogotsi gave a plenary lecture on  two-dimensional materials MXenes

Professor Yury Gogotsi, Drexel University, USA,  gave a plenary lecture on February 06, 2018 and chaired a plenary session on February 05 at the Energy Future Conference (EF3 Conference 2018) in Sydney. EF3 Conference 2018 brought together scientists, engineers, policy makers, investors, academia, and industry to discuss the latest advances in energy technology. 

 
US-Czech Conference on Advanced Nanotechnology and Chemistry 17 th – 18th January 2018, Prague, Czech

US-Czeh conference on advanced nanotechnologiesMore than 30 speakers from USA and Czech were invited, among them also was invited outstanding scientist, professor Yury Gogotsi, founder director of Drexel Nanomaterials Institute in Drexel University, USA.

 
Director of Materials Research Centre Oleksiy Gogotsi visited Jiln University, Changchun, China

Visit to Jilin University, Changchun, ChinaDirector of Materials Research Centre Oleksiy Gogotsi visited Jiln University, Changchun, China. He had a work meeting with Yury Gogotsi, Distinguished University Professor and Trustee Chair in the Department of Materials Science and Engineering at Drexel University, USA, and Distinguished Foreign Professor at Jilin University and Professor Wei Han, Executive Deputy Director of International Collaborative Center of Talents, International Center of Future Science, and discussed ongoing joint works and research on materials for supercapacitors.

 
ICEnSM 2017. 2017 International Conference on Energy Storage Materials, Shenzhen, China, November 18-21, 2017

The First International Conference on Energy Storage Materials Professor Yury Gogotsi from Drexel University, USA, has won the 2017 Energy Storage Materials Award, which is awarded by the journal Energy Storage Materials. The Award will be presented to Professor Gogotsi at the ICEnSM 2017 (2017 International Conference on Energy Storage Materials), which will be held in Shenzhen, China, on Nov. 18-21, 2017.

 
Congratulations to professor Yury Gogotsi for being named 2017 Highly Cited Researcher in two categories!

altHis research ranks among the top 1% most cited works in his field and during its year of publication, earning the mark of exceptional impact. This year is the first time Yury Gogotsi made this list in two categories - Materials Science and Chemistry.

 
Nanodiamonds Can Prevent Lithium Battery Fires
 
Session dedicated to HORIZON-2020-MSCA-RISE project 690853 «Asymmetry of biological membrane: theoretical, experimental and applied aspects» ( assymcurv ), 5th International Conference "Nanobiophysics-2017"

ilt logoOleksiy Gogotsi, director of Materials Research Center presented join research on synthesis and biomedical applications of 2D carbides MXenes.