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New Data from University of St. Andrews Illuminate Findings in Nanoporous

By a News Reporter-Staff News Editor at Science Letter — Researchers detail new data in Nanoporous. According to news reporting originating from Fife, United Kingdom, by NewsRx correspondents, research stated, “Rechargeable lithium-air (O-2) batteries are receiving intense interest because their high theoretical specific energy exceeds that of lithium-ion batteries. If the Li-O-2 battery is ever to succeed, highly reversible formation/decomposition of Li2O2 must take place at the cathode on cycling.”

Our news editors obtained a quote from the research from the University of St. Andrews, “However, carbon, used ubiquitously as the basis of the cathode, decomposes during Li2O2 oxidation on charge and actively promotes electrolyte decomposition on cycling. Replacing carbon with a nanoporous gold cathode, when in contact with a dimethyl sulphoxide-based electrolyte, does seem to demonstrate better stability. However, nanoporous gold is not a suitable cathode; its high mass destroys the key advantage of Li-O-2 over Li ion (specific energy), it is too expensive and too difficult to fabricate. Identifying a suitable cathode material for the Li-O-2 cell is one of the greatest challenges at present. Here we show that a TiC-based cathode reduces greatly side reactions (arising from the electrolyte and electrode degradation) compared with carbon and exhibits better reversible formation/decomposition of Li2O2 even than nanoporous gold (>98% capacity retention after 100 cycles, compared with 95% for nanoporous gold); it is also four times lighter, of lower cost and easier to fabricate. The stability may originate from the presence of TiO2 (along with some TiOC) on the surface of TiC.”

According to the news editors, the research concluded: “In contrast to carbon or nanoporous gold, TiC seems to represent a more viable, stable, cathode for aprotic Li-O-2 cells.”

For more information on this research see: A stable cathode for the aprotic Li-O-2 battery. Nature Materials, 2013;12(11):1049-1055. Nature Materials can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group –; Nature Materials –

The news editors report that additional information may be obtained by contacting M.M.O. Thotiyl, University of St. Andrews, EastChem, St Andrews KY16 9ST, Fife, United Kingdom. Additional authors for this research include S.A. Freunberger, Z.Q. Peng, Y.H. Chen, Z. Liu and P.G. Bruce (see also Nanoporous).


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