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Research Conducted at Argonne National Laboratory Has Provided New Information about Silicon Compounds (Molecular-Level Insights into the Reactivity...

September 9, 2014



Research Conducted at Argonne National Laboratory Has Provided New Information about Silicon Compounds (Molecular-Level Insights into the Reactivity of Siloxane-Based Electrolytes at a Lithium-Metal Anode)

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Silicon Compounds are presented in a new report. According to news originating from Argonne, Illinois, by NewsRx correspondents, research stated, "A molecular-level understanding of the reactions that occur at the lithium-metal anode/electrolyte interphase is essential to improve the performance of Li-O-2 batteries. Experimental and computational techniques are applied to explore the reactivity of tri(ethylene glycol)-substituted trimethylsilane (1NM3), a siloxane-based ether electrolyte, at the lithium-metal anode."

Our news journalists obtained a quote from the research from Argonne National Laboratory, "In situ/ex situ X-ray diffraction and Fourier-transform infrared spectroscopy studies provide evidence of the formation of lithium hydroxide and lithium carbonates at the anode upon gradual degradation of the metallic lithium anode and the solvent molecules in the presence of oxygen. Density functional calculations performed to obtain a mechanistic understanding of the reductive decomposition of 1NM3 indicate that the decomposition does not require any apparent barrier to produce lithium hydroxide and lithium carbonates when the reduced 1NM3 solvent molecules interact with the oxygen crossing over from the cathode. This study indicates that degradation may be more significant in the case of the 1NM3 solvent, compared to linear ethers such as tetraglyme or dioxalone, because of its relatively high electron affinity."

According to the news editors, the research concluded: "Also, both protection of the lithium metal and prevention of oxygen crossover to the anode are essential for minimizing electrolyte and anode decomposition."

For more information on this research see: Molecular-Level Insights into the Reactivity of Siloxane-Based Electrolytes at a Lithium-Metal Anode. Chemphyschem, 2014;15(10):2077-2083. Chemphyschem can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Chemphyschem - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1439-7641)

The news correspondents report that additional information may be obtained from R.S. Assary, Argonne Natl Lab, Center Nanoscale Mat, Argonne, IL 60439, United States. Additional authors for this research include J. Lu, X.Y. Luo, X.Y. Zhang, Y. Ren, H.M. Wu, H.M. Albishri, D. Abd El-Hady, A.S. Al-Bogami, L.A. Curtiss and K. Amine (see also Silicon Compounds).

Keywords for this news article include: Argonne, Illinois, United States, North and Central America, Chemicals, Chemistry, Lithium Carbonate, Lithium Hydroxide, Organosilicon Compounds, Silicon Compounds, Siloxanes

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


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Source: Life Science Weekly


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