Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Enhanced yet affordable material for supercapacitors: Mass Production of 3D mesoporous graphene nano-balls

10.07.2013
Korean Researchers from Ulsan National Institute of Science and Technology (UNIST) developed a new method to massively synthesize enhanced yet affordable materials for supercapacitors.

Korean Researchers from Ulsan National Institute of Science and Technology (UNIST) developed a new method to massively synthesize enhanced yet affordable materials for supercapacitors.

Supercapacitors have attracted increasing attention due to their long life cycle, highly reversible charge storage process and specific power density along with increased concern over the exhaustion of natural resources.

Graphene has been recognized as a promising active material for supercapacitors due to its outstanding electrical conductivity and large surface area, as they are the two most important requirements for supercapacitors.

Among the various methods for the fabrication of graphene sheets, the chemical vapor deposition (CVD) technique is highly recommended due to the high conductivity of as-prepared graphene. But the scalability is still needed for commercialization. Additionally these limitations called for great interest on further improvement.

The research team led by Prof. Ji-Hyun Jang from UNIST, previously reported a novel approach to synthesize CVD-grown three-dimensional graphene nano-networks (3-D GNs) that can be mass produced while retaining the excellent properties of 2D graphene and published in the (Nature Publishing Group) Scientific Reports in May 2013.

Here, Prof. Jang extended her previous research in Scientific Reports and demonstrated a unique route to obtain a mass-producible mesoporous graphene nano-ball (MGB) with a large surface area and great conductivity, via precursor-assisted CVD, using metal precursors as a catalyst which is applicable to supercapacitors.

Prof. Ji-Hyun Jang is from the Interdisciplinary School of Green Energy at UNIST and the fellow researchers include Jung-Soo Lee, Sun-I Kim and Jong-Chul Yoon from the Interdisciplinary School of Green Energy at UNIST.

Compared to the conventional graphene synthesis methods, a new way, suggested by the UNIST research group, is scalable and able to produce high quality and customizable graphene with better environmental impacts.

With the resulting materials, mesoporous graphene balls, the capacity of supercapacitor has been improved significantly. Due to the unique mesoporous structure, three-dimensional networks are formed, which help to improve conductivity. Furthermore, mesopores inside the graphene surfaces induce nanochannels to transport ions in electrolyte, and improve the properties of supercapacitor.

The MGB presents a specific surface area of 508 m2/g and mesoporosity with a mean pore diameter of 4.27 nm. The conductivity of the p-doped MGB obtained from more than 10 samples was 6.5 S/cm. The MGB-based supercapacitor shows good performance, including an excellent capacitance of 206 F/g and 96% retention of capacitance after 10,000 cycles even at a high current density.

“Our work is very meaningful since we succeed in the fabrication of CVD-grown graphene with high qualities on a gram scale,” said Prof. Jang. “When the mesoporous graphene balls are used as an electrode material for supercapacitor, it proves great potential for energy storage devices with high efficiency.”

She also said “If the properties of mesoporous graphene are improved further by continuous research, developing an electric vehicle with high power will become a realization not just a dream,” showing their future research plan.

This research was supported by National Research Foundation (NRF), Korea, and the local science park by the Ulsan metropolitan city. It was published on June 20, 2013, in ACS nano (Title: Chemical vapor deposition of mesoporous graphene nano-balls for supercapacitor ).

Ulsan National Institute of Science and Technology http://www.unist.ac.kr
The original research article is available at http://pubs.acs.org/doi/abs/10.1021/nn401850z
Homepage of Prof. Ji-Hyun Jang at http://ncl40.wix.com/nanocrystal
The original press release is available at
https://www.unist.ac.kr/board/view.sko?boardId=Notice&boardSid=5037&menuCd=
AB07002001000&contentsSid=8297&orderBy=register_dt&startPage=1&searchType=
&keyword=&searchStartDt=&searchEndDt=&dataSid=1890171
Journal information
ACS Nano
Funding information
National Research Foundation (NRF), Korea

Eunhee Song | Research asia research news
Further information:
http://www.unist.ac.kr/board/view.sko?boardId=Notice&boardSid=5037&menuCd=AB07002001000&contentsSid=8297&orderBy=register_dt&startPage=
http://www.researchsea.com

More articles from Materials Sciences:

nachricht Thanks for the memory: NIST takes a deep look at memristors
22.01.2018 | National Institute of Standards and Technology (NIST)

nachricht Let the good tubes roll
19.01.2018 | DOE/Pacific Northwest National Laboratory

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Thanks for the memory: NIST takes a deep look at memristors

22.01.2018 | Materials Sciences

Radioactivity from oil and gas wastewater persists in Pennsylvania stream sediments

22.01.2018 | Earth Sciences

Saarland University bioinformaticians compute gene sequences inherited from each parent

22.01.2018 | Life Sciences

VideoLinks Wissenschaft & Forschung
Overview of more VideoLinks >>>