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SiOC(N)/Hard Carbon Composite Anodes for Na-Ion Batteries: Influence of Morphology on the Electrochemical Properties

Kaspar, Jan and Storch, Mathias and Schitco, Cristina and Riedel, Ralf and Graczyk-Zajac, Magdalena (2016):
SiOC(N)/Hard Carbon Composite Anodes for Na-Ion Batteries: Influence of Morphology on the Electrochemical Properties.
In: Journal of The Electrochemical Society, ECS - The Electrochemical Society, pp. A156-A162, 163, (2), ISSN 0013-4651,
[Online-Edition: http://dx.doi.org/10.1149/2.0391602jes],
[Article]

Abstract

Hard carbons derived from organic precursors glucose (G) and potato starch (PS) and composite materials derived from glucose blended with commercial preceramic polymers, namely polyorganosilazane (SiOC(N)/HC) and polyorganosiloxane (SiOC/HC) are synthesized and investigated with respect to their application as anode materials for Na-ion batteries. A strong correlation is found between the electrochemical performance and the porosity of the materials, as well as the elemental composition of the samples. Mesoporous hard carbon HCPS and the nonporous composite SiOC/HCG containing low amount of oxygen (<10 wt-%) present the highest reversible capacity of 262 mAhg−1 for HCPS and 201 mAhg−1 for SiOC/HCG and the best first cycle efficiency, namely 74% for HCPS and 65% for SiOC/HCG.

Item Type: Article
Erschienen: 2016
Creators: Kaspar, Jan and Storch, Mathias and Schitco, Cristina and Riedel, Ralf and Graczyk-Zajac, Magdalena
Title: SiOC(N)/Hard Carbon Composite Anodes for Na-Ion Batteries: Influence of Morphology on the Electrochemical Properties
Language: English
Abstract:

Hard carbons derived from organic precursors glucose (G) and potato starch (PS) and composite materials derived from glucose blended with commercial preceramic polymers, namely polyorganosilazane (SiOC(N)/HC) and polyorganosiloxane (SiOC/HC) are synthesized and investigated with respect to their application as anode materials for Na-ion batteries. A strong correlation is found between the electrochemical performance and the porosity of the materials, as well as the elemental composition of the samples. Mesoporous hard carbon HCPS and the nonporous composite SiOC/HCG containing low amount of oxygen (<10 wt-%) present the highest reversible capacity of 262 mAhg−1 for HCPS and 201 mAhg−1 for SiOC/HCG and the best first cycle efficiency, namely 74% for HCPS and 65% for SiOC/HCG.

Journal or Publication Title: Journal of The Electrochemical Society
Volume: 163
Number: 2
Publisher: ECS - The Electrochemical Society
Uncontrolled Keywords: Anode, Hard Carbon, Polymer-derived ceramic, Porosity, Sodium-ion battery
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 13 Nov 2015 07:49
Official URL: http://dx.doi.org/10.1149/2.0391602jes
Identification Number: doi:10.1149/2.0391602jes
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