SKKU developed tech to make graphene batteries 10x smaller, same strength

2015_02_aerogel batteryA Korean research team has successfully developed a technology to make a sponge-like electrode material using graphene and a polymer, leading to a graphene battery. The newly-developed battery is ten times as small as existing ones, but can show the same product performance.

A research team headed by Park Ho-seok, professor of the School of Chemical Engineering at Sungkyunkwan University (SKKU), announced on Feb. 1 that it has succeeded in developing a very porous graphene aerogel electrode material by combining polyvinyl alcohol and graphene. Studies on developing high-capacity and rapidly-chargeable batteries are underway worldwide. It is necessary to compress devices in order to supply energy in extreme conditions. However, when existing graphene-based batteries are compressed by 30 percent, product performance suffers owing to the destruction of the inside structure.

For full article, see Business Korea.

POSTECH research team drastically improved graphene production efficiency

Professor Jo Gil-won
Professor Jo Gil-won

A Korean team of researchers developed a method to synthesize thin graphene film by rolling up metallic foil used as a catalyst. The research team of Professor Jo Gil-won from POSTECH Dept. of Chemical Engineering, researcher Bong Hyo-jin and Dr. Jo Sae-byeok announced on the 19th that it had developed a technology to drastically improve production efficiency of graphene, which is drawing attention as a ‘dream material’ because of its electric conductivity higher than copper, strength greater than steel and thermal conductivity higher than diamond, by rolling it into the form of a scroll.

The outcome of this study, which was recently published as a cover paper of an international academic journal for materials field ‘Nanoscale,’ draws academic circles’ attention by being a technology for large-area mass-production system that is directly relevant with graphene commercialization. Although numerous studies are being conducted on graphene competitively across the globe, studies about large-area mass-production system have not made any progresses. This is because not only it involves a large amount of raw ingredient and energy consumption, but also it requires complicated facilities and a long production time.

For full article, see Korea IT News.

 

Graphene smartphone to arrive soon

2014_02_graphene smart phoneSamsung Techwin and researchers from the Seoul National University co-developed touch screen smartphone with a promising new material ‘graphene’ layer. They developed smartphones based on technology for mass production of graphene, paving the way for the commercial production of graphene, analysts said.

Samsung Techwin’s Research & Development (R&D) Center and the chemistry department professor Hong Byung-hee and his researchers from Seoul National University noted Monday that they succeeded in applying touch screen made out of large-scale graphene film to Samsung’s smartphone ‘Galaxy.’ The research outcome was announced in the international academic journal in the nano field ‘ACS Nano.’

The latest research demonstrated the possibility of mass producing mobile phones using graphene, opening the way for graphene to be utilized in diverse areas including bendable displays and semiconductors.

The researchers adopted ‘Rapid Thermal CVD’ technology to produce graphene film. This technology saves time for mass production of graphene from 300 to 40 minutes, allowing for production of quality graphene with the size of 400×300㎟ at low temperatures.

For full article, see Maeil Business.

Korean scientists develop flexible memory device

A group of South Korean scientists has developed a new transparent and highly flexible memory device using graphene electrodes that may help develop a new, more flexible semiconductor or display panel, the science ministry said Wednesday.

Currently, graphene is used only for the top electrode of monolayers in various products, giving them some flexibility, according to the Ministry of Science, ICT and Future Planning. The team from Seoul’s Sungkyunkwan University, however, was able to use graphene for both the top and bottom electrodes of a monolayer for the first time in the world. The use of graphene for the bottom electrode was made possible through a chemical union of the bottom electrode with the molecular film of organic molecules placed between the two electrodes, the team said.

For full article, see Yonhap News.

Samsung develops graphene device for transistor use

Samsung Electronics Co., the world’s largest computer memory-chip maker, said Friday it has developed a graphene device that could help revolutionize the capabilities of transistors.

Samsung’s advanced institute of technology said it has successfully created a three-terminal active device with a graphene variable barrier, which can effectively cut off electric currents in transistors.

Graphene is a super-strong and flexible material with the potential to be used in next-generation semiconductors and displays. Until now, its inability to cut off electric currents has made its use in transistors impossible.

“If the experimental graphene device is fully developed, it could be used to make transistors with 100 times the computing power of conventional silicon units,” the institute said. “It could thus help make better semiconductors and other electronic devices.”
The latest breakthrough has been published in the online edition of Science Magazine and nine patents have been secured.

Full article on: Yonhap news

Tech to enable frozen human into life later: KAIST team

Cryo-regeneration may not be a science fiction anymore. You may see awakened frozen people on the street in the future.

A Korean research team has developed a technology that enables researchers to watch and analyze liquid with graphene, one-atom-thick slice of graphite, for the first times in the world.

It is generally regarded impossible to bring frozen humans back to life again because body cells are destroyed in the freezing in the thawing process.

However, if scientists could find what is happening to cell liquid during the process with the technology, they would eventually succeed in reviving frozen humans, according to the team from the Korea Advanced Institute of Science and Technology (KAIST) in Daejeon, about 160 kilometers south of Seoul.

For full article see Korea Times

Simple, Cheap Way to Mass-Produce Graphene Nanosheets

CLEVELAND, OH, USA- Graphene, which is made from graphite, the same stuff as “lead” in pencils, has been hailed as the most important synthetic material in a century. Sheets conduct electricity better than copper, heat better than any material known, are harder than diamonds yet stretch.

Scientists worldwide speculate graphene will revolutionize computing, electronics and medicine but the inability to mass-produce sheets has blocked widespread use.

A description of the new research will be published the week of March 26 in the online Early Edition of the Proceedings of the National Academy of Sciences. The story is embargoed until Monday, March 26, 2012 at 3 p.m. U.S. Eastern time

Jong-Beom Baek, professor and director of the Interdisciplinary School of Green Energy/Advanced Materials & Devices, Ulsan National Institute of Science and Technology, Ulsan, South Korea, led the effort.

“We have developed a low-cost, easier way to mass produce better graphene sheets than the current, widely-used method of acid oxidation, which requires the tedious application of toxic chemicals,” said Liming Dai, professor of macromolecular science and engineering at Case Western Reserve and a co-author of the paper.

To read how, see full article: Korea IT Times

KERI’s nanomaterials ready for mass production

Big things come in small packages. As man expands the world and discovers new possibilities, size becomes an essential property of our technological revolution. With the emergence of new technologies, miniaturization is the name of the game. 

February 16, 2012 marks the eventful agreement between Dr. Lee Keon-woong who leads his Nano Hybrid Technology Research Center at the Korea Electro-technology Research Institute (KERI) and Sang Bo Corporation (Sang Bo). This agreement allows for mass production and commercialization of graphene, one of the most prominent and desired nanomaterials of the current age. It will provide the soft electronic technology necessary to produce computers that can be folded, fitted into bags, and even wound around wrists.

National Consensus on Graphene’s Significance 

Graphene is a two-dimensional nanomaterial with the thickness of a single atom. Its quantum mechanical structure possesses excellent electric, physical, and chemical features, making it the most ideal material for application due to its high electric conductivity and charge mobility. This finding led to an explosion of related studies over recent years. Hence, the technology has been the center of attention in both public and private sectors. The Korean government launched a KRW 210 billion program to develop graphene and to promote this technology. Under this national consensus and drive to enhance this technology, KERI, one of the leading national public research centers, joined forces with the most renowned company in graphene manufacturing. 

For full article see Korea IT Times.

Opening next-generation memory chip era with dream material ‘graphene’

A research team led by Prof. Cho Byung-jin at KAIST demonstrated that if the metal gate electrode in conventional silicon-based semiconductors is replaced with a graphene electrode, the performance and credibility of the semiconductors can be improved to a level that is required in the future semiconductor market. 

The research finding is noteworthy because it does not require significant change to the conventional semiconductor production process. It is a technique that can be applied directly to semiconductor devices that are currently being mass produced. Thus far, graphene has never been applied to silicon-based electronic devices, which constitute the centerpiece of the global semiconductor market. The research team anticipates the new technology could be directly applied to mass production in the near future.

For full article see Korea Science.