Qu, Fangmu ; Yu, Zhaoju ; Krol, Monika ; Chai, Nan ; Riedel, Ralf ; Graczyk-Zajac, Magdalena (2022):
Electrochemical Performance of Carbon-Rich Silicon Carbonitride Ceramic as Support for Sulfur Cathode in Lithium Sulfur Battery. (Publisher's Version)
In: Nanomaterials, 12 (8), MDPI, e-ISSN 2079-4991,
DOI: 10.26083/tuprints-00021293,
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Item Type: | Article |
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Origin: | Secondary publication DeepGreen |
Status: | Publisher's Version |
Title: | Electrochemical Performance of Carbon-Rich Silicon Carbonitride Ceramic as Support for Sulfur Cathode in Lithium Sulfur Battery |
Language: | English |
Abstract: | As a promising matrix material for anchoring sulfur in the cathode for lithium-sulfur (Li-S) batteries, porous conducting supports have gained much attention. In this work, sulfur-containing C-rich SiCN composites are processed from silicon carbonitride (SiCN) ceramics, synthesized at temperatures from 800 to 1100 °C. To embed sulfur in the porous SiCN matrix, an easy and scalable procedure, denoted as melting-diffusion method, is applied. Accordingly, sulfur is infiltrated under solvothermal conditions at 155 °C into pores of carbon-rich silicon carbonitride (C-rich SiCN). The impact of the initial porosity and microstructure of the SiCN ceramics on the electrochemical performance of the synthesized SiCN-sulfur (SiCN-S) composites is analysed and discussed. A combination of the mesoporous character of SiCN and presence of a disordered free carbon phase makes the electrochemical performance of the SiCN matrix obtained at 900 °C superior to that of SiCN synthesized at lower and higher temperatures. A capacity value of more than 195 mAh/g over 50 cycles at a high sulfur content of 66 wt.% is achieved. |
Journal or Publication Title: | Nanomaterials |
Volume of the journal: | 12 |
Issue Number: | 8 |
Place of Publication: | Darmstadt |
Publisher: | MDPI |
Collation: | 14 Seiten |
Uncontrolled Keywords: | SiCN ceramic matrix, disordered carbon, porous structure, sulfur cathode |
Classification DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids |
Date Deposited: | 06 May 2022 11:05 |
Last Modified: | 06 Oct 2022 11:20 |
DOI: | 10.26083/tuprints-00021293 |
Corresponding Links: | |
URN: | urn:nbn:de:tuda-tuprints-212935 |
SWORD Depositor: | Deep Green |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/21293 |
PPN: | 49984503X |
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