Navigation Links
Air Force support for a new generation of lithium-ion batteries
Date:7/15/2013

A few months back, the Air Force Office of Scientific Research (AFOSR) was proud to publish an article regarding a research accomplishment by Dr. Jim Tour and his research team at Rice University. AFOSR, along with other funding agencies, supported Dr. Tour's research effort to make graphene suitable for a variety of organic chemistry applications -- especially the promise of advanced chemical sensors, nanoscale electronic circuits and metamaterials.

Four years ago, Tour's research team demonstrated that they could chemically unzip cylindrical shaped carbon nanotubes into soluble graphene nanoribbons (GNR) without compromising the electronic properties of the graphitic structure. A recent paper by the Tour team, published in IEEE Spectrum and partially funded by AFOSR, showed that GNR can significantly increase the storage capacity of lithium ion (Li-ion) by combining graphene nanoribbons with tin oxide.

By producing GNR in bulk, a necessary requirement for making this a viable process, the Tour team mixes GNR and 10 nanometer wide particles of tin oxide to create a slurry. By adding a cellulose gum binding agent and water, the mixture is then applied to a capacitor, which is then fitted to a button-style lithium-ion battery.

In the Tour lab tests, the prototype battery had an initial charge capacity of more than 1,520 milliamp hours per gram (mAh/g). After repeated charge-discharge cycles that number began to plateau at about 825 mAh/g, but after 50 discharge cycles, the batteries retained far more capacity -- more than double -- that of Li-ion batteries that employ standard graphite anodes.

The critical key that makes the increase in battery capacity possible is the significant improvement in flexibility that graphene nanoribbons lend to the anode. By comparison, conventional Li-ion batteries with graphite anodes break down and lose efficiency because of their inability to flex, as they expand and contract, with repeated charge and discharge cycles; over time the graphite cracks and the battery cannot charge. Conversely, anodes with a graphene nanoribbon platform allow the tin oxide particles to maintain a consistent size, rather than expanding and contracting, and thus eliminating the brittleness and cracking associated with a graphite-based anode.

This breakthrough may very well lead to the next generation of the lithium-ion battery -- a promising new platform for creating more durable, lightweight and efficient lithium-ion power.


'/>"/>

Contact: Robert White
robert.white@afosr.af.mil
703-588-0665
Air Force Office of Scientific Research
Source:Eurekalert

Related biology technology :

1. Bioforce Receives American Botanical Councils Tyler Award
2. Air Force Office of Scientific Research hosts nanotechnology pioneer
3. inVentiv Health Completes Acquisition of Kforce Clinical Research
4. Nation Must Invest in Biomedical Research/Health Workforce, AAHC President Tells Congress
5. Bode Technology Launches Same-Day DNA Service For Faster Response to Law Enforcement and Justice System
6. Calmar Laser Growth Reinforced by ISO 9001:2008 Certification
7. Boyd Coatings Awarded Workforce Training Grant
8. Avenida Suites Brazil Sponsors 4th Annual Global HR News Conference in Sao Paulo Focused on Global Mobility Workforce Issues
9. Sanofi Oncology and Colon Cancer Coalition Join Forces to Raise Awareness of Colorectal Cancer
10. Digital Science & SciBite Join Forces to Harness Big Data for Life Sciences
11. Oxford Performance Materials and Biomet Microfixation Join Forces
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/11/2017)... ... October 11, 2017 , ... A ... pregnancy rates in frozen and fresh in vitro fertilization (IVF) transfer ... age to IVF success. , After comparing the results from the fresh and ...
(Date:10/10/2017)... (PRWEB) , ... October 10, 2017 , ... ... Science Center’s FirstHand program has won a US2020 STEM Mentoring Award. Representatives of ... award for Excellence in Volunteer Experience from US2020. , US2020’s mission is to ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM Life Sciences ... the life sciences and healthcare industries, announces a presentation by Subbu Viswanathan and ... presentation, “Automating GxP Validation for Agile Cloud Platforms,” will present a revolutionary approach ...
(Date:10/9/2017)... ... October 09, 2017 , ... At its national board meeting ... a professor in Harvard University’s Departments of Physics and Astronomy, has been selected for ... of the winning team for the 2015 Breakthrough Prize in Fundamental physics for the ...
Breaking Biology Technology:
(Date:4/11/2017)... -- NXT-ID, Inc. (NASDAQ:   NXTD ) ("NXT-ID" ... of independent Directors Mr. Robin D. Richards and ... furthering the company,s corporate governance and expertise. ... Gino Pereira , Chief Executive Officer ... guidance and benefiting from their considerable expertise as we move ...
(Date:4/5/2017)... April 4, 2017 KEY FINDINGS ... expand at a CAGR of 25.76% during the forecast ... the primary factor for the growth of the stem ... https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global stem cell ... application, and geography. The stem cell market of the ...
(Date:3/30/2017)... , March 30, 2017 The research team ... for three-dimensional (3D) fingerprint identification by adopting ground breaking 3D fingerprint ... new realm of speed and accuracy for use in identification, crime ... affordable cost. ... A ...
Breaking Biology News(10 mins):