Qu, Fangmu ; Graczyk-Zajac, Magdalena ; Vrankovic, Dragoljub ; Chai, Nan ; Yu, Zhaoju ; Riedel, Ralf (2021)
Effect of morphology of C-rich silicon carbonitride ceramic on electrochemical properties of sulfur cathode for Li-S battery.
In: Electrochimica Act, 384
doi: 10.1016/j.electacta.2021.138265
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Porous conducting materials represent a promising support for the immobilization of sulfur in the cathode of lithium-sulfur (Li-S) batteries. Herein, we provide an easy and scalable procedure for the preparation of such cathodes. This strategy consists of an infiltration of sulfur under solvothermal conditions at 155 degrees C into pores of carbon-rich silicon carbonitride (C-rich SiCN). Porous polymer-derived SiCN ceramics possess a unique combination of high electronic conductivity and robust, stress accommodating mechanical properties. The impact of the initial porosity and elemental composition of SiCN ceramics on the electrochemical performance of SiCN-S composites is addressed in this work. It is shown that material pyrolyzed at 1000 degrees C revealing a mesoporous character in line with the presence of a free carbon phase dispersed in SiCN demonstrates the best electrochemical stability and the highest capacity (more than 310 mAh/g over 40 cycles) at a high sulphur content of 66 wt.%.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Qu, Fangmu ; Graczyk-Zajac, Magdalena ; Vrankovic, Dragoljub ; Chai, Nan ; Yu, Zhaoju ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Effect of morphology of C-rich silicon carbonitride ceramic on electrochemical properties of sulfur cathode for Li-S battery |
| Sprache: | Englisch |
| Publikationsjahr: | 10 Juli 2021 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Electrochimica Act |
| Jahrgang/Volume einer Zeitschrift: | 384 |
| DOI: | 10.1016/j.electacta.2021.138265 |
| Kurzbeschreibung (Abstract): | Porous conducting materials represent a promising support for the immobilization of sulfur in the cathode of lithium-sulfur (Li-S) batteries. Herein, we provide an easy and scalable procedure for the preparation of such cathodes. This strategy consists of an infiltration of sulfur under solvothermal conditions at 155 degrees C into pores of carbon-rich silicon carbonitride (C-rich SiCN). Porous polymer-derived SiCN ceramics possess a unique combination of high electronic conductivity and robust, stress accommodating mechanical properties. The impact of the initial porosity and elemental composition of SiCN ceramics on the electrochemical performance of SiCN-S composites is addressed in this work. It is shown that material pyrolyzed at 1000 degrees C revealing a mesoporous character in line with the presence of a free carbon phase dispersed in SiCN demonstrates the best electrochemical stability and the highest capacity (more than 310 mAh/g over 40 cycles) at a high sulphur content of 66 wt.%. |
| Freie Schlagworte: | SiCN ceramic matrix, Disordered carbon, Porous structure, Sulfur cathode, Pyrolysis temperature, Lithium, Capacity, Diffusion, Ion, Electrode, Composite, Conversion, Challenges, Anodes, Paper |
| Zusätzliche Informationen: | China Scholarship Council, Grant Number 201904910776 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 01 Jul 2021 05:38 |
| Letzte Änderung: | 01 Jul 2021 05:38 |
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