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URN etd-0915108-170022 Statistics This thesis had been viewed 2786 times. Download 1052 times. Author Yan-Ming Zhang Author's Email Address email@example.com Department Materials Engineering Year 2007 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 128 Title Preparation of Sn/C composite anode materials for lithium ion batteries Keyword Sn NaBH4 acid-washing natural graphite natural graphite acid-washing NaBH4 Sn Abstract Sn/C composites were prepared via a NaBH4 reduction method with carbon-coated natural graphite and SnCl4 in aqueous solution. Effects of acid washing on the disorder ness and the surface function groups on the surface of carbon-coated natural graphite surface were studied with XRD and Raman spectroscopy. The physical properties of the prepared Sn/C composites were investigated with XRD, TGA and SEM. The electrochemical properties of the prepared samples before and after Sn deposition were estimated with capacity retention study. The results demonstrated that nano-Sn particle deposited on carbon-coated natural graphite can be prepared successfully by having Sn4+ react with hydroxy group on the surface of carbon-coated natural graphite before adding 1,10-phenanthroline. The amount of Sn deposition increases with increasing ratio of Sn4+/NaBH4 addition. The sample prepared with Sn4+/NaBH4 molar ratio of 1/32 shows the most promising cycling performance among the prepared samples. Advisor Committee She-huang Wu - advisor
Lin, Yung-Jen - co-chair
Nae-Lih Wu - co-chair
Wen-Chang Chen - co-chair
Files Date of Defense 2008-07-23 Date of Submission 2008-09-16