Universität zu Köln

Aravindan, Vanchiappan ORCID: 0000-0003-1357-7717, Sundaramurthy, Jayaraman, Kumar, Elumalai Naveen, Kumar, Palaniswamy Suresh ORCID: 0000-0001-7397-9027, Ling, Wong Chui, von Hagen, Robin, Mathur, Sanjay, Ramakrishna, Seeram ORCID: 0000-0001-8479-8686 and Madhavi, Srinivasan (2014). Does carbon coating really improves the electrochemical performance of electrospun SnO2 anodes? Electrochim. Acta, 121. S. 109 - 116. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-3859

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Abstract

In this paper, we report the influence of carbon coating on the electrochemical performance of hollow structured SnO2 electrospun nanofibers. The electrospun nanofibers are subjected to plasma enhanced chemical vapour deposition for a conformal carbon coating of similar to 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 0.005-2.5V 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 SnO2, 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 SnO2 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. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Aravindan, Vanchiappan UNSPECIFIED orcid.org/0000-0003-1357-7717 UNSPECIFIED Sundaramurthy, Jayaraman UNSPECIFIED UNSPECIFIED UNSPECIFIED Kumar, Elumalai Naveen UNSPECIFIED UNSPECIFIED UNSPECIFIED Kumar, Palaniswamy Suresh UNSPECIFIED orcid.org/0000-0001-7397-9027 UNSPECIFIED Ling, Wong Chui UNSPECIFIED UNSPECIFIED UNSPECIFIED von Hagen, Robin UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Ramakrishna, Seeram UNSPECIFIED orcid.org/0000-0001-8479-8686 UNSPECIFIED Madhavi, Srinivasan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-445234
DOI:	10.1016/j.electacta.2013.12.141
Journal or Publication Title:	Electrochim. Acta
Volume:	121
Page Range:	S. 109 - 116
Date:	2014
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-3859
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LITHIUM-ION BATTERIES; ENERGY-STORAGE; NANOFIBERS; REVERSIBILITY; COMPOSITES; DIOXIDE; CATHODE Multiple languages Electrochemistry Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/44523