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Findings from Drexel University in the Area of Electrolytes Described (How Does Nanoscale Crystalline Structure Affect Ion Transport in Solid Polymer...

August 8, 2014



Findings from Drexel University in the Area of Electrolytes Described (How Does Nanoscale Crystalline Structure Affect Ion Transport in Solid Polymer Electrolytes?)

By a News Reporter-Staff News Editor at Science Letter -- A new study on Electrolytes is now available. According to news reporting originating from Philadelphia, Pennsylvania, by NewsRx correspondents, research stated, "Polymer electrolytes have attracted intensive attention due to their potential applications in all-solid-state lithium batteries. Ion conduction in this system is generally considered to be confined in the amorphous polymer/ion phase, where segmental relaxation of the polymer above glass transition temperature facilitates ion transport."

Our news editors obtained a quote from the research from Drexel University, "In this article, we show quantitatively that the effect of polymer crystallization on ion transport is twofold: structural (tortuosity) and dynamic (tethered chain confinement). We decouple these two effects by designing and fabricating a model polymer single crystal electrolyte system with controlled crystal structure, size, crystallinity, and orientation. Ion conduction is confined within the chain fold region and guided by the crystalline lamellae. We show that, at low content, due to the tortuosity effect, the in-plane conductivity is 2000 times greater than through-plane one. Contradictory to the general view, the dynamic effect is negligible at moderate ion contents."

According to the news editors, the research concluded: "Our results suggest that semicrystalline polymer is a valid system for practical polymer electrolytes design."

For more information on this research see: How Does Nanoscale Crystalline Structure Affect Ion Transport in Solid Polymer Electrolytes? Macromolecules, 2014;47(12):3978-3986. Macromolecules can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Macromolecules - www.pubs.acs.org/journal/mamobx)

The news editors report that additional information may be obtained by contacting S. Cheng, Drexel University, Dept. of Mat Sci & Engn, Philadelphia, PA 19104, United States. Additional authors for this research include D.M. Smith and C.Y. Li (see also Electrolytes).

Keywords for this news article include: Nanoscale, Philadelphia, Pennsylvania, Electrolytes, United States, Nanotechnology, Inorganic Chemicals, Emerging Technologies, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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