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

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

Abstrakt

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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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
SOLID STATE IONICS nr 263, strony 131 - 139,
ISSN: 0167-2738
Język:
angielski
Rok wydania:
2014
Opis bibliograficzny:
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:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.ssi.2014.06.002
Weryfikacja:
Politechnika Gdańska

wyświetlono 149 razy

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