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Improvement of silicon powder negative electrodes by copper electroless deposition for lithium secondary batteries

DC Field Value Language
dc.contributor.authorKim, Jae Woo-
dc.contributor.authorRyu, Ji Heon-
dc.contributor.authorLee, Kyu T.-
dc.contributor.authorOh, Seung M.-
dc.date.accessioned2009-07-24T07:39:17Z-
dc.date.available2009-07-24T07:39:17Z-
dc.date.issued2005-02-25-
dc.identifier.citationJ. Power Sources 147 (2005) 227en
dc.identifier.issn0378-7753-
dc.identifier.issnhttp://dx.doi.org/10.1016/j.jpowsour.2004.12.041-
dc.identifier.urihttps://hdl.handle.net/10371/5823-
dc.description.abstractIn order to enhance the electrical conductivity of Si powder, which shows a poor cycleabilty as the anode in lithium secondary batteries due to low electrical conductivity and a severe volume change on cycling, Cu is deposited on the Si surface by a electroless deposition method. As Cu deposition on bare Si powder is found to be unsatisfactory, Si powder is etched to roughen the surface, on to which a large amount of Cu deposit with a uniform coverage is obtained. The resulting anode material exhibits improved cycle performance as a result of conductivity enhancement. The long-term cycleability is, however, still unsatisfactory due to detachment of Cu from the Si surface that is caused by a severe volume change of the Si particles on cycling. The detachment of Cu is greatly suppressed by annealing at 400 °C in an inert atmosphere and, thereby, delivers better cycle performance. The improvement in interfacial stability exhibited by the annealed samples is ascribed to the formation of a Cu3Si alloy phase at the interface and diffusion of Cu atoms into the Si particles.en
dc.description.sponsorshipThis work was partially supported by KOSEF through the Research Center for Energy Conversion and Storage, and by financial support from the Center for Nanostructured Materials Technology under the 21st Century Frontier R&D Programs of the Ministry of Science and Technology, Korea. Financial support from LG Chem. Ltd. is also acknowledged.en
dc.language.isoen-
dc.publisherElsevieren
dc.subjectLithium secondary batteryen
dc.subjectSilicon powder anodeen
dc.subjectCopper electroless depositionen
dc.subjectAnnealingen
dc.subjectGalvanostatic intermittent titrationen
dc.subjectCycle performanceen
dc.titleImprovement of silicon powder negative electrodes by copper electroless deposition for lithium secondary batteriesen
dc.typeArticleen
dc.contributor.AlternativeAuthor김재우-
dc.contributor.AlternativeAuthor류지현-
dc.contributor.AlternativeAuthor오승모-
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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