1. Preparation and Characterization of Tin/Carbon Composites for Lithium-Ion Cells
- Author
-
William R. Even, Ronald A. Guidotti, David J. Irvin, and K.J. Gross
- Subjects
Materials science ,Scanning electron microscope ,chemistry.chemical_element ,chemistry.chemical_compound ,chemistry ,Lithium ,Graphite ,Dimethyl carbonate ,Composite material ,Tin ,Carbon ,Pyrolysis ,Ethylene carbonate ,Nuclear chemistry - Abstract
A number of Sn/C composites were prepared for evaluation as anode materials for Li-ion cells. In one case, samples were prepared by incorporation of Sn species into organic precursors that were then pyrolyzed under an Ar/H2 cover gas to prepare the Sn/C composites. They were also prepared by decoration of various types of carbon with nanoparticles of Sn by electroless deposition using hydrazine. The carbons examined included a disordered carbon prepared in house from poly(methacrylonitrile), a mesocarbon microbead (MCMB) carbon, and a platelet graphite. The Sn/C composites were examined by x-ray diffraction (XRD) and scanning electron microscopy (SEM) and were also analyzed for Sn content. They were then tested as anodes in three-electrode cells against Li metal using 1M LiPF6 in ethylene carbonate (EC)/dimethyl carbonate (DMC) solution. The best overall electrochemical performance was obtained with a Sn/C composite made by electroless deposition of 10% Sn onto platelet graphite.
- Published
- 2002
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