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Carbon-rich SiOC anodes for lithium-ion batteries: Part I. Influence of material UV-pre-treatment on high power properties

Graczyk-Zajac, M. and Toma, L. and Fasel, C. and Riedel, R. (2012):
Carbon-rich SiOC anodes for lithium-ion batteries: Part I. Influence of material UV-pre-treatment on high power properties.
225, In: Solid State Ionics, Elsevier Science Publishing, pp. 522-526, ISSN 01672738, [Online-Edition: http://dx.doi.org/10.1016/j.ssi.2011.12.007],
[Article]

Abstract

Polymer-derived carbon-rich SiOC ceramics were studied in view of its application as anode material for lithium ion batteries. The samples were prepared at 1100 and 1300 °C by direct precursor pyrolysis or by a UV-radiation supported crosslinking applied before the thermal treatment. By means of various characterization techniques (Raman spectroscopy, X-ray diffraction, and elemental analysis) we found out that the UV-crosslinking procedure preceding the thermal treatment significantly influences the amount as well as the structural and electrochemical properties of the resulting carbon phase. The strong impact of those properties on the lithium insertion capacity and high current capability was analysed. The crosslinked sample prepared at 1100 °C revealed a stable reversible capacity of more than 650 mAh g− 1 for lower currents and more than 80 mAh g− 1 when a charge/discharge current of 4000 mAg− 1 is used. The extended cycling with high current does not lead to sample damage and the initial capacity is recovered when lower currents are applied after the high current charging/discharging procedure. We attribute these excellent properties of the crosslinked sample prepared at 1100 °C to the particular disorder of the carbon phase portioned in situ from the SiOC matrix under these conditions.

Item Type: Article
Erschienen: 2012
Creators: Graczyk-Zajac, M. and Toma, L. and Fasel, C. and Riedel, R.
Title: Carbon-rich SiOC anodes for lithium-ion batteries: Part I. Influence of material UV-pre-treatment on high power properties
Language: English
Abstract:

Polymer-derived carbon-rich SiOC ceramics were studied in view of its application as anode material for lithium ion batteries. The samples were prepared at 1100 and 1300 °C by direct precursor pyrolysis or by a UV-radiation supported crosslinking applied before the thermal treatment. By means of various characterization techniques (Raman spectroscopy, X-ray diffraction, and elemental analysis) we found out that the UV-crosslinking procedure preceding the thermal treatment significantly influences the amount as well as the structural and electrochemical properties of the resulting carbon phase. The strong impact of those properties on the lithium insertion capacity and high current capability was analysed. The crosslinked sample prepared at 1100 °C revealed a stable reversible capacity of more than 650 mAh g− 1 for lower currents and more than 80 mAh g− 1 when a charge/discharge current of 4000 mAg− 1 is used. The extended cycling with high current does not lead to sample damage and the initial capacity is recovered when lower currents are applied after the high current charging/discharging procedure. We attribute these excellent properties of the crosslinked sample prepared at 1100 °C to the particular disorder of the carbon phase portioned in situ from the SiOC matrix under these conditions.

Journal or Publication Title: Solid State Ionics
Volume: 225
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Li-ion battery; Anode materials; Carbon-rich SiOC ceramics; Polymer-derived ceramics (PDCs)
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A4: Novel functional ceramics using anionic substitution in oxidic systems
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 13 Jan 2012 11:46
Official URL: http://dx.doi.org/10.1016/j.ssi.2011.12.007
Additional Information:

SFB 595 A4

Identification Number: doi:10.1016/j.ssi.2011.12.007
Funders: The Authors acknowledge the financial support by the Deutsche Forschungsgemeinschaft (DFG), Bonn, Germany within SFB 595/A4 and SPP 1473 programs.
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