Events and E-News

Newsletter

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CLS E-News                          Vol. 8 No. 9
www.lightsource.ca           Aug 31, 2011
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  1. Call for proposals deadline Wednesday, September 7, 2011
  2. Research Highlight: The discharge rate capability of rechargeable LiO2 batteries
  3. Increase your impact factor: Talk about your CLS science
  4. CLS Corporate Annual Report released
  5. New Staff and Now Hiring

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1. CALL FOR PROPOSALS DEADLINE IS WEDNESDAY, SEPTEMBER 7, 2011
Contact: mailto:clsuo@lightsource.ca   

The call for proposals closes Wednesday, September 7th at 23:59 CST for scheduling of beam time for the January-June, 2012 period. The schedule can be viewed at http://www.lightsource.ca/operations/schedule.php 

GENERAL USER PROPOSALS received for operational beamlines are reviewed for safety and technical feasibility, and then scored for scientific merit by an external review committee. Research time obtained through this competitive peer review process takes place twice per year. General User research should result in the publication of scientific results.

You have the option of submitting a NEW proposal or a Beam Time Request against an Active Proposal. Allocation of shifts for January-June, 2012 will be based on the highest ranked proposals (both new and active). The evaluation criteria include quality of science, suitability of CLS resources and quality and capability of the researchers.  To view evaluation criteria used in reviewing and rating proposals see http://www.lightsource.ca/uso/peer_reviews.php; to compare your score to others on the same beamline, please visit http://www.lightsource.ca/uso/results_of_call.php

View participating beamlines at http://www.lightsource.ca/uso/beamline_status.php

In addition to normal mode operations at 250 mA, shifts are available for Single Bunch Mode and Coherent Synchrotron Radiation studies. These shifts must be applied for through the General User program.

For more information, please visit our website: http://www.lightsource.ca/uso/call_proposals.php
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2. RESEARCH HIGHLIGHT: THE DISCHARGE RATE CAPABILITY OF RECHARGEABLE Li-O2 BATTERIES
Contact: mailto:shaohorn@mit.edu

The O2 electrode in Li-O2 cells was shown to exhibit gravimetric energy densities (considering the total weight of oxygen electrode in the discharged state) four times that of LiCoO2 with comparable gravimetric power. The discharge rate capability of Au-catalyzed Vulcan carbon and pure Vulcan carbon (VC) as the O2 electrode, was studied in the range of 100 to 2000 mA per grams of carbon. The discharge voltage and capacity of the Li-O2 cells were shown to decrease with increasing rates. Unlike propylene carbonate based electrolytes, the rate capability of Li-O2 cells tested with 1,2-dimethoxyethane was found not to be limited by oxygen transport in the electrolyte. X-Ray diffraction (XRD) showed lithium peroxide as the discharge product and no evidence of Li2CO3 and LiOH was found. It is hypothesized that higher discharge voltages of cells with Au/C than VC at low rates could have originated from higher oxygen reduction activity of Au/C. At high rates, higher discharge voltages with Au/C than VC could be attributed to faster lithium transport in nonstoichiometric and defective lithium peroxide formed upon discharge, which is supported by XRD and X-ray absorption near edge structure O and Li K edge data.

The synchrotron data used in this study were taken at the SGM and VLS-PGM beamlines at the CLS by researchers from the Massachusetts Institute of Technology and the CLS.

Lu Y-C; D.G. Kwabi, K.P.C. Yao, J.R. Harding, J. Zhou, L. Zuin, Yang Shao-Horn. The discharge rate capability of rechargeable Li-O2 batteries. Energy & Environmental Science 2011, 4, pp. 2999-3007. DOI: 10.1039/c1ee01500a.
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3. INCREASE YOUR IMPACT FACTOR: TALK ABOUT YOUR CLS SCIENCE AND WIN AN iPOD
Contact: matthew.dalzell@lightsource.ca

We are always on the look-out for exciting scientific results obtained with CLS data that can be featured in a news release or science highlight. In order to maximize how we can spread the word, it is ideal if we can be made aware of a significant article as early as possible - usually as soon as a paper has been accepted for publication.

Starting July 1, send us a tip regarding your upcoming publication and be entered to win an iPod Nano. The winner will be announced in January, 2012. For more information or to submit your tip please contact Matt Dalzell, CLS Communications Coordinator and Staff Science Writer.
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4. CLS 2010-2011 CORPORATE ANNUAL REPORT RELEASED
Contact: James Bardwell at mailto:jbardwel@umich.edu

Our corporate annual report for fiscal year 2010-2011 is now available for download at http://www.lightsource.ca/corporate_documents/annual_reports.php. Entitled "Spotlight on Discovery," this year's report features profiles of some of our users from across Canada. Thanks to all those who agreed to be part of the report. To request a copy, feel free to email Tom Kennedy.
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5. NEW STAFF & NOW HIRING
Contact: jobs@lightsource.ca

We are pleased to welcome the following new employees who started with us recently:
Bud Fogal, Electrical Engineer-AOD
Bud is working on completing his Doctor of Philosophy in Electrical Engineering and most recently worked as a Test Engineer at Vecima Networks.

Steve Kristjansson, Mechanical CAD Technologist Steve has over 10 years of CAD/CAM Technologist experience, and most recently worked at JNE Welding.

The following job postings are currently available at CLS:

For a list of current opportunities at the CLS please check our website regularly: http://www.lightsource.ca/careers/
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CLS E-News is an electronic newsletter designed to keep users and stakeholders informed about developments at the Canadian Light Source, the national synchrotron research facility located at the University of Saskatchewan, Saskatoon. Current and past issues of CLS E-News are available on the CLS web site: http://www.lightsource.ca/enews/archives.php
To unsubscribe please go to http://www.lightsource.ca/enews/signup.php . We welcome suggestions for topics and content. Contact us at mailto:cls@lightsource.ca
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Last modified: 2012-01-19 17:01:10