New ceramic materials derived from pyrolyzed poly(1,2-dimethylsilazane) and starch as a potential anode for Li-ion batteries - Publication - Bridge of Knowledge

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New ceramic materials derived from pyrolyzed poly(1,2-dimethylsilazane) and starch as a potential anode for Li-ion batteries

Abstract

Newmaterialswere obtained by pyrolysis of starch (S) and poly(1,2-dimethylsilazane) (PSN) (weight ratio: PSN/S 30/70) at temperature a) 500 °C, b) 700 °C and c) 900 °C. Ceramic materials were characterized by infrared spectroscopy, TGA, Raman spectroscopy and SEM. New Si\O and shifted Si\C stretching vibration modes emerged confirming direct interaction between silicon originating fromsilazane and oxygen coming fromstarch. The specific capacity of PSN/S 30/70 pyrolyzed at 900 °C was 301 mAh/g with capacity fading about 6% after 100th cycles. These values are higher (~50%) in comparison with the capacity of pure starch pyrolyzed at the same conditions. Electrochemical impedance spectroscopy allowed to establish temperature dependence of the particular components of an electrical equivalent circuit. The Arrhenius type behavior was confirmed for ionic transport within SEI. The charge transfer resistance, being a part of modified Randles circuit, was found to increase with temperature. Ionic transport within the electrode bulk material is represented by semiinfinitive Warburg impedance. The reciprocal of Warburg coefficient (1/σW) diminishes with temperature.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
SOLID STATE IONICS no. 263, pages 131 - 139,
ISSN: 0167-2738
Language:
English
Publication year:
2014
Bibliographic description:
Nowak A., Wicikowska B., Lisowska-Oleksiak A.: New ceramic materials derived from pyrolyzed poly(1,2-dimethylsilazane) and starch as a potential anode for Li-ion batteries// SOLID STATE IONICS. -Vol. 263, (2014), s.131-139
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.ssi.2014.06.002
Verified by:
Gdańsk University of Technology

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