Navigation Links
Silicon-carbon electrodes snap, swell, don't pop
Date:3/14/2012

ge National Laboratory in Oak Ridge, Tenn., Applied Sciences Inc. in Cedarville, Ohio, and General Motors Global R&D Center in Warren, Mich. created carbon nanofibers with a thin layer of silicon wrapped around. They provided the electrodes to the team at PNNL to probe their behavior while functioning.

First, Wang and colleagues tested how much lithium the electrodes could hold and how long they lasted by putting them in a small testing battery called a half-cell. After 100 charge-discharge cycles, the electrodes still maintained a very good capacity of about 1000 milliAmp-hours per gram of material, five to 10 times the capacity of conventional electrodes in lithium ion batteries.

Although they performed well, the team suspected that the expansion and contraction of the silicon could be a problem for the battery's longevity, since stretching tends to wear things out. To determine how well the electrodes weather the repeated stretching, Wang popped a specially designed, tiny battery into a transmission electron microscope, which can view objects nanometers wide, in DOE's EMSL, the Environmental Molecular Sciences Laboratory on the PNNL campus.

They zoomed in on the tiny battery's electrode using a new microscrope that was funded by the Recovery Act. This microscope allowed the team to study the electrode in use, and they took images and video while the tiny battery was being charged and discharged.

Not Crystal Glass

Previous work has shown that charging causes lithium ions to flow into the silicon. In this study, the lithium ions flowed into the silicon layer along the length of the carbon nanofiber at a rate of about 130 nanometers per second. This is about 60 times faster than silicon alone, suggesting that the underlying carbon improves silicon's charging speed.

As expected, the silicon layer swelled up about 300 percent as the lithium entered. However, the combination of the carbon support and the si
'/>"/>

Contact: Mary Beckman
mary.beckman@pnnl.gov
509-375-3688
DOE/Pacific Northwest National Laboratory
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Manufacturing made to measure atomic-scale electrodes
2. Charging makes nano-sized electrodes swell, elongate and spiral
3. Liquid metal key to simpler creation of electrodes for microfluidic devices
4. UCLA team develops highly efficient method for creating flexible, transparent electrodes
5. Ondine Announces Presentation of Positive Clinical Trial Results at the American Academy of Periodontologys 94th Annual Meeting
6. Boston University Periodontal Study on Imagenetix Compound Published in The Journal of Periodontology
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Silicon-carbon electrodes snap, swell, don't pop
(Date:7/10/2014)... 2014 Women in the West ... an additional family planning option. Sayana® Press has ... all levels of the health system and in ... widely used contraceptive—Pfizer’s Depo-Provera® (depot medroxyprogesterone acetate)—with the ... the first of four African countries expected to ...
(Date:7/10/2014)... UK (PRWEB) July 10, 2014 ... 21st Century Medicine Forum on ‘Commercialising Longevity Research’ ... and entrepreneurs to the London Bioscience Innovation Center ... Research Foundation and Aging Analytics Ltd. The meeting ... investment in translational research for age-related disease, as ...
(Date:7/10/2014)... 2014 Terascala, the industry leader in ... Swahn, a former vice president of product management for ... president of marketing. Terascala’s software when combined with leading ... the highest performance and most reliable solutions for processing ... Terascala’s channel expansion and broaden its product portfolio. His ...
(Date:7/10/2014)... (PRWEB) July 10, 2014 Robert Harman, DVM, ... Medicine company, is proud to announce the relaunch of his ... with a new series called “ What are Stem Cells ... an honest and straightforward foundation in the basics of stem ... decision on the right type of treatment when considering regenerative ...
Breaking Biology Technology:Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 2Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 3Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 4Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 5Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 6DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6Terascala Expands Executive Team 2Terascala Expands Executive Team 3Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3
... Terrorist organizations sometimes have an advantage in the media. ... University of Haifa, published in the journal of Israel,s ... the advantage in this arena too. , ... against terrorist organizations, sometimes more so than conventional weapons. ...
... to strengthen its European business OFFENBACH MAIN, Germany, May ... Ltd., a leading multinational full service Contract Research Organization ... as President Strategic Operations Europe. Mr. Spector will be ... Mediation . Mr. Spector brings to Omega Mediation more ...
... Enfant(TM) Pediatric VEP Vision Testing System, Providing Early Detection ... If your child had vision problems, you,d be able ... Goldman, M.D., pediatrician at Children,s Health Center in Gurnee."Children ... deficits, even those they,ve had since birth," says Dr. ...
Cached Biology Technology:Information warfare in the 21st century: Ideas are sometimes stronger than bombs 2SIRO Group Appoints Scott L. Spector as President, Strategic Operations, for its European Business 2Chicago-Area Pediatricians Offering Unique Test to Detect Vision Problems in Children as Young as Six Months of Age 2
(Date:7/11/2014)... of kidney injury related to the use of hydroxyethyl ... HES molecules, according to a report in Anesthesia ... Research Society (IARS). , The "total mass of HES ... human renal proximal tubule cells (PTCs), concludes the laboratory ... Hospital Wrzburg, Austria. Other factorssuch as differences in ...
(Date:7/11/2014)... to the hippocampus, the marginal division of the ... What is the impact degree of substance P ... memory function? Yan Yu and his team, College ... using immunofluorescence staining, that substance P receptor, neurokinin ... striatal marginal division of normal rats. Unilateral or ...
(Date:7/11/2014)... Evidence exists that cannabinoid receptor type 1 ... Ca2+ influx, and reduce neurotransmitter release. However, ... 1 can increase extracellular Ca2+ influx and ... his team, Tongji Hospital Affiliated to Tongji ... Technology, China used whole cell voltage-clamp and ...
Breaking Biology News(10 mins):In lab studies, hydroxyethyl starch has direct harmful effects on kidney cells 2
... 2009 The Center for Stem Cell & Regenerative Medicine ... Clinic (CC), University Hospitals (UH), and Athersys, Inc. has ... the Research Commercialization Program. The funding will help support ... four emerging and three pilot projects. This funding will ...
... scientists from Europe and China have gathered in Barcelona this ... research projects using data from ESA and Chinese Earth observation ... and the Ministry of Science and Technology (MOST) of China ... monitor and understand environmental phenomena in China. ,The symposium, held ...
... Although every cell in the body carries the genes ... small proportion of stem cells mature into those important immune-system ... Health and his colleagues have identified two "molecular motors" that ... cells. They published their findings June 19 in the online ...
Cached Biology News:CWRU receives $5 million from Ohio Third Frontier Commission 2CWRU receives $5 million from Ohio Third Frontier Commission 3Europe and China watching Earth together 2Pushmi-pullyu of B-cell development discovered 2
...
For mRNA Differential Display with three one-base anchored oligo-dT primers and rationally designed arbitrary 13mers. These kits feature the latest generation of isotopic mRNA Differential Display t...
NATIVE, ENZYME PORCINE TRYPSIN...
G-Protein Coupled Receptor Assay, For 500 assays. SPA. Category: Drug Screening & Cellular Assays, Assays ....
Biology Products: