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:10/30/2014)... October 29, 2014 Global polyvinyl chloride ... world economic crisis during 2008-2009, especially in North America ... and currently is keeping to a growing trend. , ... is utilized in the construction segment. In 2013, the ... profiles, tubing, sheets and rigid film. Moreover, the PVC ...
(Date:10/30/2014)... 30, 2014 James Sherley says he has ... tissue stem cell technology since his days as a principal ... in the late 1990’s. Sherley founded the ASCTC as ... holds all the intellectual property developed in Sherley’s research over ... Massachusetts Institute of Technology (MIT), and more recently as a ...
(Date:10/30/2014)... CARLSBAD, Calif. , Oct. 30, 2014 Isis ... antisense therapeutics, today announced that management will present a company ... 2014 at 8:30 a.m. ET in Boston, MA. ... will be available on the "Investors & Media" section of ... available on the Isis website within 48 hours and will ...
(Date:10/27/2014)... Ryan Carfley , Managing Partner at ... down with Bryan Hamilton, the publisher of the Triangle Business ... in the Research Triangle region of North Carolina. , Just ... the roundtable include the role of social media in ... balance and the unique role that Millennials play in the ...
Breaking Biology Technology:Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 2Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 2Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 4Isis Pharmaceuticals to Present at the Nomura Biotechnology Conference 2Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 2Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 3
... , ... transfer has traditionally been a fast but inefficient method , ... buffer system, transfer efficiency can be greatly increased. In protein , ... elution of the proteins , from a gel and ...
... Introduction , Amplification of ... highly sensitive method capable of copying millions of DNA molecules from , ... extreme sensitivity of this method, , any carry-over ... or extra bands. Carry-over contamination can be avoided by using positive , ...
... Luis A Ugozzoli, Bio-Rad Laboratories, Inc., 2000 Alfred Nobel Drive,Hercules, ... Introduction , ... greatly refined since its advent 16 years ago. Several improvements , ... the way PCR is performed today relative to earlier protocols. ...
Cached Biology Technology:Increased Transfer Efficiency Using a Discontinuous Buffer System With the Trans-Blot SD Cell 2Increased Transfer Efficiency Using a Discontinuous Buffer System With the Trans-Blot SD Cell 3Increased Transfer Efficiency Using a Discontinuous Buffer System With the Trans-Blot SD Cell 4Inactivation of Contaminating Templates in PCR Using High Intensity Ultraviolet Light 2Inactivation of Contaminating Templates in PCR Using High Intensity Ultraviolet Light 3The Gradient Feature: Use in Optimization of Allelic Discrimination Assays, Rev B 2The Gradient Feature: Use in Optimization of Allelic Discrimination Assays, Rev B 3The Gradient Feature: Use in Optimization of Allelic Discrimination Assays, Rev B 4The Gradient Feature: Use in Optimization of Allelic Discrimination Assays, Rev B 5The Gradient Feature: Use in Optimization of Allelic Discrimination Assays, Rev B 6The Gradient Feature: Use in Optimization of Allelic Discrimination Assays, Rev B 7The Gradient Feature: Use in Optimization of Allelic Discrimination Assays, Rev B 8
(Date:10/30/2014)... When most animals begin life, cells immediately begin accepting ... organ. However, mammals, including humans, are special. The cells ... choice – to become the protective placenta or to ... critical first step that research from Michigan State University ... current issue of PLOS Genetics , ...
(Date:10/30/2014)... 2014 – Bacteria in the gastrointestinal tract fulfill ... Yet, these same bacteria can induce strong inflammatory ... the gut and enter the bloodstream. , Although ... the body, chronic or systemic inflammation is linked ... established the involvement of inflammatory processes in the ...
(Date:10/30/2014)... , Oct. 29, 2014  Securus Technologies, ... justice technology solutions for public safety, investigation, ... has deployed exciting enhancements to its THREADS™ ... to provide actionable intelligence and focused leads ... to drive technological innovation through identifying and ...
Breaking Biology News(10 mins):Identifying the source of stem cells 2Breakdown in gut barriers to bacteria may promote inflammation and craving in alcoholics 2Securus Technologies Adds Advanced Features to Its Industry-Leading Investigative Analytics Product 2
... at the Texas Biomedical Research Institute in San Antonio ... of "bad" cholesterol. This discovery could lead to the ... heart disease., "Our findings are important because they provide ... reduce heart disease risk in humans," said Laura Cox, ...
... Dr. Philippe Wernet, chemist Prof. Dr. Athina Zouni of Humboldt ... Accelerator Laboratory and Dr. Junko Yano of the Lawrence Berkeley ... In spite of the fact that all aerobic organisms ... Because as part of photosynthesis, green plants, algae, and cyanobacteria ...
... predicts their political opinions on economic redistribution, according ... , a journal of the Association for Psychological ... psychological scientists Michael Bang Petersen of Aarhus ... Santa Barbara believe that the link may ...
Cached Biology News:4 genes indentified that influence levels of 'bad' cholesterol 2Snap shots of 1 of life's central processes 2Political motivations may have evolutionary links to physical strength 2
... [RS17 ] to PRKAR2 cAMP is ... of cellular functions. cAMP exerts its effects ... which transduces the signal through phosphorylation of ... AMPK is a tetramer composed of two ...
... Rocking Shaker provides the exact agitation ... The very slow to fast speed ... provide a gentle wave motion that ... blotted membranes to achieve faster, more ...
...
... Have you bought a Perkin Elmer UltraVIEW ... using the Andor iXon and iQ software? No ... that upgrade. You keep your existing microscope, lasers, ... will customise it to work with our precision ...
Biology Products: