Navigation Links
Clay key to high-temperature supercapacitors
Date:9/3/2013

ttery's electrodes, that won't break down when the heat is on. Another issue has been finding a separator that won't shrink at high temperatures and lead to short circuits. (The separator keeps the electrolyte on the anode and cathode sides of a traditional battery apart while allowing ions to pass through).

"Our innovation has been to identify an unconventional electrolyte/separator system that remains stable at high temperatures," Ajayan said.

The Rice researchers led by Reddy and Rachel Borges solved both problems at once. First, they investigated using room-temperature ionic liquids (RTILs) developed in 2009 by European and Australian researchers. RTILs show low conductivity at room temperature but become less viscous and more conductive when heated.

Clay has high thermal stability, high sorption capacity, a large active surface area and high permeability, Reddy said, and is commonly used in muds for oil drilling, in modern construction, in medical applications and as a binder by iron and steel foundries.

After combining equal amounts of RTIL and naturally occurring Bentonite clay into a composite paste, the researchers sandwiched it between layers of reduced graphene oxide and two current collectors to form a supercapacitor. Tests and subsequent electron microscope images of the device showed no change in the materials after heating it to 200 degrees Celsius. In fact, Reddy said, there was very little change in the material up to 300 degrees Celsius.

"The ionic conductivity increases almost linearly until the material reaches 180 degrees, and then saturates at 200," he said.

Despite a slight drop in capacity observed in the initial charge/discharge cycles, the supercapacitors were stable through 10,000 test cycles. Both energy and power density improved by two orders of magnitude as the operating temperature increased from room temperature to 200 degrees Celsius, the researchers found.

The team
'/>"/>

Contact: Mike Williams
mikewilliams@rice.edu
713-348-6728
Rice University
Source:Eurekalert

Page: 1 2 3

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)...  Automation is fundamentally transforming the travel experience and nowhere ... the past decade, ePassports, biometric readers, and secure document ... border control via eGates and Automated Passport Control (APC) ... land borders across the globe. According ...
(Date:12/11/2014)... N.C. , Dec. 10, 2014  That blood pressure plays ... a while. Hypertension – the medical term for high blood ... early 1800s, and the inflatable cuff that,s used in measuring ... however, mean there,s nothing new about hypertension, its triggers and ...
(Date:12/10/2014)... 2014  Wake Forest Baptist Medical Center today announced plans for ... Funding for this $50 million capital project is part of ... summer. The medical education building will be ... complex, adjacent to 525@vine in Wake Forest Innovation Quarter. Construction ...
Breaking Biology News(10 mins):Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4
... diphtheria toxin-encoding DNA selectively expressed in ovarian cancer cells ... researchers expect this therapy could be tested in humans ... in Cancer Research , a journal of the ... stage ovarian cancer can be treated with a combination ...
... who have less strength, poor physical function and low muscle density ... more strength and better function. That,s the finding of a new ... The study also found that muscle density, a measure of ... muscle, is a more accurate gauge of a person,s risk of ...
... U.S. biologists this week report that a little-understood protein previously ... critical role in building and maintaining healthy cells. Even more ... that the protein, called "atlastin," does its work by fusing ... asked me a year ago whether this was possible, I ...
Cached Biology News:Nanoparticle-delivered 'suicide' genes slowed ovarian tumor growth 2Reducing risk of hospitalization in the elderly 2Little-known protein found to be key player 2
(Date:1/22/2015)... RBJ today announces the firm brokered a long-term lease totaling ... biopharmaceutical company, at Two Ledgemont Center in Lexington, ... president, and Brian Cohen , senior vice president, represented ... 95 Hayden Ave. Photo - http://photos.prnewswire.com/prnh/20150122/170765 ...
(Date:1/22/2015)... RBJ today announces the firm brokered a long-term lease totaling ... biopharmaceutical company, at Two Ledgemont Center in Lexington, ... president, and Brian Cohen , senior vice president, represented ... 95 Hayden Ave. Photo - http://photos.prnewswire.com/prnh/20150122/170765 ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 The laboratory ... that has witnessed a number of technological advancements due ... regulatory requirements, growing need to integrate healthcare systems, and ... ease challenges in system integration. Key players in the ...
(Date:1/22/2015)... / Rootstown, OH (PRWEB) January 22, 2015 ... platform, announced today that it has received AOAC-PTM Certifications for ... O1O3, O111, O121, and O145; collectively referred to as STEC ... O157, at 1 colony forming unit (cfu) per 325 g ...
Breaking Biology Technology:Transwestern | RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Transwestern?RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 4Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2
... /PRNewswire-FirstCall/ - Dragon Pharmaceutical Inc. ("Dragon Pharma" or the "Company" TSX: ... be held on Tuesday, July 20, 2010 at ... at Suite 310, 650 West Georgia Street, Vancouver, British Columbia ... May 28, 2010 will be entitled to vote upon ...
... BARBARA, Calif. , June 28 Abviva, Inc. (OTC: ... breast cancer related applications of Mammastatin, today announced they will be ... be sponsoring the OneMedForum NY 2010. Stifel was recently ranked #1 ... The Wall Street Journal,s Best on the Street Survey for 2010 ...
... 28, 2010 Shivsu Canadian Clear,International Ltd, a leading water technology solution ... organizations and,Government of Africa to set up industrial waste water treatment ... will be involved in design,manufacture, supply and installation of the plants. , ... Capable of treating effluents ...
Cached Biology Technology:Dragon Pharma announces date of special meeting 2Abviva to Present at OneMedForum Sponsored by Stifel Nicolaus 2Indian Multinational Company Confirms USD 6 Million Order to Set up Industrial Waste Water Treatment Plants in Africa 2Indian Multinational Company Confirms USD 6 Million Order to Set up Industrial Waste Water Treatment Plants in Africa 3
Request Info...
Purified anti-eIF-4E...
Peptide-affinity Purified Polyclonal Antibody to SMAD7 Peptide with sequence SSCPCWLEVIFNSR, from C Terminus of the protein sequence according to NP_005895....
Purified anti-PXR...
Biology Products: