Electrochemical Insertion of Lithium into Polyacrylonitrile‐Based Disordered Carbons
| Autor: | Sang‐Ick Lee, Sang Chul Shim, Yongju Jung, Myung-Soo Kim, Juhyoun Kwak, Min Chul Suh, Hwashim Lee |
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| Rok vydání: | 1997 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Intercalation (chemistry) Inorganic chemistry Polyacrylonitrile chemistry.chemical_element Ionic bonding Condensed Matter Physics Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials NMR spectra database Crystallography chemistry.chemical_compound chemistry Materials Chemistry Ionic conductivity Lithium Cyclic voltammetry |
| Zdroj: | Journal of The Electrochemical Society. 144:4279-4284 |
| ISSN: | 1945-7111 0013-4651 |
| Popis: | Electrochemical lithium insertion into polyacrylonitrile (PAN)-based disordered carbons was studied using the techniques of discharge/charge tests, cyclic voltammetry, and {sup 7}Li nuclear magnetic resonance (NMR) spectroscopy. The PAN-based carbons were prepared by vacuum pyrolysis of PAN at 500, 800, and 1,000 C. They showed charge capacities between 254 and 380 mAh/g in the first cycle. {sup 7}Li NMR spectra showed two kinds of lithium insertion sites in the PAN-based carbons: a reversible site where lithium is removed in the subsequent charge process and an irreversible site where lithium remains intact. The NMR results suggest that lithium in fully Li-inserted PAN-based carbons has an ionic character, and reversible site lithium resides between negatively charged carbon layers. |
| Databáze: | OpenAIRE |
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