Navigation Links
Engineer making rechargeable batteries with layered nanomaterials
Date:1/16/2013

lms to create the negative electrode of a lithium-ion cell and then studied the charge and discharge characteristics of this rechargeable battery. They found the graphene films grown on copper did not cycle the lithium ions and the battery capacity was negligible. But graphene grown on nickel showed improved performance because it was able to store and release lithium ions more efficiently.

"We believe that this behavior occurs because sheets of graphene on nickel are relatively thick near the grain boundaries and stacked in a well-defined manner -- called Bernal Stacking -- which provides multiple sites for easy uptake and release of lithium ions as the battery is discharged and charged," Singh said.

In a second research project, the researchers created tungsten disulfide nanosheets that were approximately 10 layers thick. Starting with bulk tungsten disulfide powder -- which is a type of dry lubricant used in the automotive industry -- the team was able to separate atomic layer thick sheets of tungsten disulfide in a strong acid solution. This simple method made it possible to produce sheets in large quantities. Much like graphene, tungsten disulfide also has a layered atomic structure, but the individual layers are three atoms thick.

The researchers found that these acid-treated tungsten disulfide sheets could also store and release lithium ions but in a different way. The lithium is stored through a conversion reaction in which tungsten disulfide dissociates to form tungsten and lithium sulfide as the cell is discharged. Unlike graphene, this reaction involves the transfer of at least two electrons per tungsten atom. This is important because researchers have long disregarded such compounds as battery anodes because of the difficulty associated with adding lithium to these materials, Singh said. It is only recently that the conversion reaction-based battery anodes have gained popularity.

"We also realize that tungsten disulfid
'/>"/>

Contact: Gurpreet Singh
gurpreet@k-state.edu
785-532-7085
Kansas State University
Source:Eurekalert

Page: 1 2 3 4

Related biology technology :

1. Stanford engineers use nanophotonics to reshape on-chip computer data transmission
2. Arizona State University engineers aim to improve performance of technology in extreme environments
3. Superior Controls of Seabrook, NH Named System Integrator of the Year for 2012 by Control Engineering Magazine
4. U.S. Tissue Engineering Markets
5. Stanford engineers weld nanowires with light
6. Microbes may be engineered to help trap excess CO2 underground
7. Smart, self-healing hydrogels open far-reaching possibilities in medicine, engineering
8. Engineer Robert J. Wood to receive NSFs Alan T. Waterman Award
9. Straintronics: Engineers create piezoelectric graphene
10. Global Genetic Engineering Industry
11. X-BODY BioSciences to Present Novel Methods of Selecting for Antibodies Against Targets on Live Cells at CHIs Protein Engineering Summit
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/15/2014)... Jan. 15, 2014   Niagara Thermal Products is ... Buffalo BioBlower Technologies LLC ("B3") as the critical thermal ... award from the Army Corps of Engineers.  B3 has ... all biological contaminants and destroys VOCs and other chemical ...
(Date:1/15/2014)... (PRWEB) January 15, 2014 Cynvenio, a ... management through the genomic analysis of tumor cells in ... Finder™, a web-based cancer decision support application powered by ... with Cynvenio’s ClearID™ genomic test, Therapy Finder will provide ...
(Date:1/15/2014)... RedBrick Health , a fast-growing leader in consumer health ... EmblemHealth , the New York -based ... RedBrick Compass health assessment, combined with the RedBrick Journeys ... EmblemHealth is among the first health plans in the ...
(Date:1/15/2014)... 15, 2014 A study has been launched ... Formula 1 track could help to tackle the problem of ... Stowhealth (a GP surgery based in Stowmarket) and academics at ... Telemetry technology, which is inspired by equipment used ...
Breaking Biology Technology:Niagara Thermal Products LLC Selected as Critical Supplier for Buffalo BioBlower Air Purification Systems 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4
... As open ... at leading industry events. , ... Washington, DC (PRWEB) June 11, 2010 -- Open source software will be a featured topic ... Meeting is the premier event for professionals involved in the discovery, development, and life ...
... 11 PRA International, a leading Clinical Research Organization, is exhibiting ... 15th congress in Barcelona 10-13 June 2010 . , ... At PRA,s booth (#202), conference ... M.D., to discuss the key issues and latest developments in hematology drug ...
... , FORT WORTH, Texas , ... of a new educational module "Exploring Biofilms," an,accredited, online course designed ... play in chronic wound infections. , ... "Bacterial biofilms are a ...
Cached Biology Technology:Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 2Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 3PRA International Exhibits at European Hematology Association Congress 2The Wound Institute(R) Launches Educational Course on Bacterial Biofilms 2The Wound Institute(R) Launches Educational Course on Bacterial Biofilms 3The Wound Institute(R) Launches Educational Course on Bacterial Biofilms 4
(Date:4/17/2014)... that devastate honeybees in Europe, Asia and the United ... appear to be impacting native honeybee populations at this ... invasive pests include including Nosema microsporidia and ... to be resilient to these invasive pests, which suggests ... in Europe, Asia and the United States currently are ...
(Date:4/17/2014)... France have hit on a novel method to ... correct and most effective treatment possible., Kidney stones ... and developing world. If left untreated, apart from ... failure and other complications. In many patients treated ... a more effective pathological approach to diagnosis and ...
(Date:4/17/2014)... IPCC meeting painted a stark warning on the possible ... a greenhouse effect 32 times that of carbon dioxide. ... humic substances act as fully regenerable electron acceptors which ... in wetlands instead of being released to the atmosphere. ... disrupted it may enter into a vicious cycle to ...
Breaking Biology News(10 mins):East African honeybees are safe from invasive pests… for now 2East African honeybees are safe from invasive pests… for now 3Methane climate change risk suggested by proof of redox cycling of humic substances 2
... Researchers from the University of Georgia College of ... that could open new avenues for treating Ichthyophthirius ... that commonly attacks freshwater fish. With the ... harbors two apparently symbiotic intracellular bacteria: Bacteroides, ...
... turns out that wearing a cap is good for you, ... from the Johns Hopkins Engineering in Oncology Center have shown ... holds the cell,s nucleus, its genetic storehouse, in its proper ... the researchers say, could provide clues to the diagnosis and ...
... Calif., Dec. 2 DigitalPersona, Inc., a leader in ... with IBM to deploy a new model of its ... systems. The DigitalPersona U.are.U® 4500HD offering allows point-of-sale applications ... specific transactions can be linked to the individuals who ...
Cached Biology News:UGA researchers lead team in discovery involving devastating freshwater fish parasite, 'Ich' 2UGA researchers lead team in discovery involving devastating freshwater fish parasite, 'Ich' 3A cell's 'cap' of bundled fibers could yield clues to disease 2DigitalPersona Fingerprint Sensor Technology Ships on IBM SurePOS 500 Retail Systems 2
Immunogen: VDAC3 Protein Storage: -20 C, Avoid Freeze/Thaw Cycles...
TRBP1 Antibody...
Complete cell culture media with cytokines...
Collected from sexually mature, mixed sex, mixed breed cats. Physiochemical constituents are measured to ensure lot-to-lot consistency....
Biology Products: