Does carbon coating really improves the electrochemical performance of electrospun SnO2 anodes?
| Autor: | Palaniswamy Suresh Kumar, Wong Chui Ling, Vanchiappan Aravindan, Jayaraman Sundaramurthy, Elumalai Naveen Kumar, Sanjay Mathur, Seeram Ramakrishna, Srinivasan Madhavi, Robin von Hagen |
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| Přispěvatelé: | Vanchiappan, Aravindan, Jayaraman, Sundaramurthy, Elumalai, Naveen Kumar, Palaniswamy, Suresh Kumar, Wong, Chui Ling, Von Hage,n Robin, Mathur, Sanjay, Ramakrishna, Seeram, Srinivasan, Madhavi |
| Rok vydání: | 2014 |
| Předmět: |
hollow nanofibers
Conversion reaction Materials science General Chemical Engineering technology industry and agriculture Nanotechnology equipment and supplies Tin oxide Electrochemistry Electrospinning Anode Deposition temperature carbon coating Chemical engineering conversion reaction Carbon coating Fiber electrospinning tin oxide |
| Zdroj: | Electrochimica Acta. 121:109-115 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2013.12.141 |
| Popis: | In this paper, we report the influence of carbon coating on the electrochemical performance of hollow structured SnO 2 electrospun nanofibers. The electrospun nanofibers are subjected to plasma enhanced chemical vapour deposition for a conformal carbon coating of ∼6 nm thickness without destroying the one dimensional morphological features of the fiber mats. Li-storage properties are evaluated in half-cell configuration between two different potential windows i.e. 0.005-0.8 V and 0.005-2.5 V vs. Li. The potential regions tested corresponds to the alloying/de-alloying and alloying/de-alloying & conversion reactions for former and latter cases, respectively. Very high reversibility over 3.6 moles of Li is feasible for both bare and carbon coated SnO 2 , without an obvious difference between the electrochemical profiles noted during cycling. In contrary, huge differences in the electrochemical performances are observed for bare and carbon coated SnO 2 when the test cell is cycled for conversion reaction. This result clearly shows the importance of carbon coating for conversion reaction compared to alloying/de-alloying reaction. |
| Databáze: | OpenAIRE |
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