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Investigators at Tsinghua University Report Findings in Chalcogens (Cathode materials based on carbon nanotubes for high-energy-density...

July 11, 2014



Investigators at Tsinghua University Report Findings in Chalcogens (Cathode materials based on carbon nanotubes for high-energy-density lithium-sulfur batteries)

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Chalcogens. According to news reporting out of Beijing, People's Republic of China, by NewsRx editors, research stated, "The rational integration of conductive nanocarbon scaffolds and insulative sulfur is an efficient method to build composite cathodes for high-energy-density lithium-sulfur batteries. The full demonstration of the high-energy-density electrodes is a key issue towards full utilization of sulfur in a lithium-sulfur cell."

Our news journalists obtained a quote from the research from Tsinghua University, "Herein, carbon nanotubes (CNTs) that possess robust mechanical properties, excellent electrical conductivities, and hierarchical porous structures were employed to fabricate carbon/sulfur composite cathode. A family of electrodes with areal sulfur loading densities ranging from 0.32 to 4.77 mg cm(-2) were fabricated to reveal the relationship between sulfur loading density and their electrochemical behavior. At a low sulfur loading amount of 0.32 mg cm(-2), a high sulfur utilization of 77% can be achieved for the initial discharge capacity of 1288 mAh g(s)(-1), while the specific capacity based on the whole electrode was quite low as 84 mAh g(C/S+binder+Al)(-1) at 0.2 C. Moderate increase in the areal sulfur loading to 2.02 mg cm(-2) greatly improved the initial discharge capacity based on the whole electrode (280 mAh g(C/S+binder+Al)(-1)) without the sacrifice of sulfur utilization."

According to the news editors, the research concluded: "When sulfur loading amount further increased to 3.77 mg cm(-2), a high initial areal discharge capacity of 3.21 mAh cm(-2) (864 mAh g(s)(-1)) was achieved on the composite cathode."

For more information on this research see: Cathode materials based on carbon nanotubes for high-energy-density lithium-sulfur batteries. Carbon, 2014;75():161-168. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)

Our news journalists report that additional information may be obtained by contacting L. Zhu, Tsinghua Univ, Dept. of Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, People's Republic of China. Additional authors for this research include W.C. Zhu, X.B. Cheng, J.Q. Huang, H.J. Peng, S.H. Yang and Q. Zhang (see also Chalcogens).

Keywords for this news article include: Asia, Sulfur, Beijing, Chalcogens, Fullerenes, Nanotechnology, Carbon Nanotubes, Emerging Technologies, People's Republic of China

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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