Influence of pyrolysis atmosphere on the lithium storage properties of carbon-rich polymer derived SiOC ceramic anodes

V.s. Pradeep; Magdalena Graczyk-Zajac; Monika Wilamowska-Zawłocka; Ralf Riedel; G.d. Soraru

doi:10.1016/j.ssi.2013.08.043

Influence of pyrolysis atmosphere on the lithium storage properties of carbon-rich polymer derived SiOC ceramic anodes

Abstract

Polymer derived carbon-rich SiOC ceramics are prepared from polysiloxane precursors through a pyrolysis process at 1000 °C using pure argon and argon/hydrogen mixture as pyrolysis atmosphere. The precursor is synthesized from a linear (Si–H)-containing polysiloxane cross-linked with divinylbenzene using hydrosilylation reaction in the presence of a platinum catalyst. Pyrolysis in Ar/H2 mixtures, compared to the treatment under pure Ar, results into a decrease of the concentration of C dangling bonds as revealed by electron spin resonance (ESR) measurements. The amount of free carbon phase is 10 wt.% lower in the sample pyrolysed in a Ar/H2 mixture, while the ratio of hydrogen to free carbon remains constant for both, in Ar and in Ar/H2 pyrolysed samples. The sample prepared under Ar/H2 mixture shows an excellent cycling stability with an increase in the specific capacity of about 150 mAhg− 1 compared to its analogues pyrolysed in pure argon atmosphere

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Authors (5)

V.s. Pradeep
- Università di Trento .
Magdalena Graczyk-Zajac
- Technische Universität Darmstadt Fachbereich Material-und Geowissenschaften
Monika Wilamowska-Zawłocka dr hab. inż.
Ralf Riedel
- Technische Universität Darmstadt Fachbereich Material-und Geowissenschaften
G.d. Soraru
- Università di Trento .

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: SOLID STATE IONICS no. 262, pages 22 - 24,
ISSN: 0167-2738
Language:: English
Publication year:: 2014
Bibliographic description:: Pradeep V., Graczyk-Zajac M., Wilamowska-Zawłocka M., Riedel R., Soraru G.: Influence of pyrolysis atmosphere on the lithium storage properties of carbon-rich polymer derived SiOC ceramic anodes// SOLID STATE IONICS. -Vol. 262, (2014), s.22-24
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.ssi.2013.08.043
Verified by:: Gdańsk University of Technology