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Electrochemical studies of carbon-rich polymer-derived SiCN ceramics as anode materials for lithium-ion batteries

Graczyk-Zajac, Magdalena and Mera, Gabriela and Kaspar, Jan and Riedel, Ralf (2010):
Electrochemical studies of carbon-rich polymer-derived SiCN ceramics as anode materials for lithium-ion batteries.
In: Journal of the European Ceramic Society, Elsevier Science Publishing, pp. 3235-3243, 30, (15), ISSN 09552219,
[Online-Edition: http://dx.doi.org/10.1016/j.jeurceramsoc.2010.07.010],
[Article]

Abstract

The electrochemical behavior of poly(phenylvinylsilylcarbodiimide)-derived SiCN ceramics as anode material for lithium-ion batteries is reported here for the first time. The novel carbon-rich silicon carbonitride (SiCN) ceramics have been synthesized by the thermal treatment of poly(phenylvinylsilylcarbodiimide) under argon atmosphere at five temperatures, namely 1100, 1300, 1500, 1700 and 2000 °C. The SiCN electrodes were prepared without any conducting additives and were tested in electrochemical two electrodes cell using cyclic voltammetry and galvanostatic techniques. The capacity of the carbon-rich SiCN samples was found to be stable upon galvanostatic cycling and reaches almost 300 mAh/g for the sample prepared at 1300 °C with oxygen as the impurity. The dependence of the microstructure, especially of the crystallinity of the segregated carbon phase and of the oxygen impurities on the electrochemical behavior of the SiCN material, was analysed. At all temperatures of thermolysis, the free carbon phase has been identified as “soft carbon”.

Item Type: Article
Erschienen: 2010
Creators: Graczyk-Zajac, Magdalena and Mera, Gabriela and Kaspar, Jan and Riedel, Ralf
Title: Electrochemical studies of carbon-rich polymer-derived SiCN ceramics as anode materials for lithium-ion batteries
Language: English
Abstract:

The electrochemical behavior of poly(phenylvinylsilylcarbodiimide)-derived SiCN ceramics as anode material for lithium-ion batteries is reported here for the first time. The novel carbon-rich silicon carbonitride (SiCN) ceramics have been synthesized by the thermal treatment of poly(phenylvinylsilylcarbodiimide) under argon atmosphere at five temperatures, namely 1100, 1300, 1500, 1700 and 2000 °C. The SiCN electrodes were prepared without any conducting additives and were tested in electrochemical two electrodes cell using cyclic voltammetry and galvanostatic techniques. The capacity of the carbon-rich SiCN samples was found to be stable upon galvanostatic cycling and reaches almost 300 mAh/g for the sample prepared at 1300 °C with oxygen as the impurity. The dependence of the microstructure, especially of the crystallinity of the segregated carbon phase and of the oxygen impurities on the electrochemical behavior of the SiCN material, was analysed. At all temperatures of thermolysis, the free carbon phase has been identified as “soft carbon”.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 30
Number: 15
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Li-ion batteries, Anode, SiCN ceramic, Polymer-derived ceramic, Soft carbon
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
Zentrale Einrichtungen
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
Date Deposited: 04 Aug 2011 11:57
Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2010.07.010
Additional Information:

SFB 595 A4

Identification Number: doi:10.1016/j.jeurceramsoc.2010.07.010
Funders: This study was performed within the collaborative research center SFB 595/A4 funded by the DFG, Bonn, Germany and within the DFG-NSF research initiative “Stability of the NanoDomain Structure of Polymer-Derived SiCN Ceramics at High Temperatures”., We gratefully acknowledge also the financial support by the Fonds der Chemischen Industrie, Frankfurt (Germany).
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