2024 - Sustainable Industrial Processing Summit
SIPS 2024 Volume 16. Intl. Symp on Electrochemistry, Molten Salts, Corrosion, Recycling and Battery
| Editors: | F. Kongoli, C.A. Amatore, R. Fehrmann, G. Kipouros, I. Paspaliaris, G. Saevarsdottir, R. Singh, R. Gupta, M. Halama, D. Macdonald, F. Wang, M. Barinova, F. Ahmed, C. Gaidau, X. Guo, K. Kolomaznik, H. Ozgunay, K. Tang, N.N. Thanh, S. Yefremova, K. Aifantis, Z. Bakenov, C. Capiglia, V. Kumar, A. U. H. Qurashi, A. Tressaud, R. Yazami |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2024 |
| Pages: | 243 pages |
| ISBN: | 978-1-998384-34-1 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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DEVELOPMENT OF FUNCTIONAL COMPOSITE MATERIALS FOR LITHIUM SULFUR BATTERY
Mukhammed Kenzhebek1; Fail Sultanov1; Almagul Mentbayeva1;1NAZARBAYEV UNIVERSITY, Astana, Kazakhstan;
Type of Paper: Regular
Id Paper: 422
Topic: 14
Abstract:
Recent research has increasingly focused on lithium-sulfur (Li-S) batteries due to their notable advantages, such as a high theoretical capacity of 1675 mAh/g, low cost, and the abundance of sulfur. Despite these benefits, the commercialization of Li-S batteries is hindered by several challenges, including the insulating nature of sulfur, substantial volume expansion of up to 80%, and the polysulfide shuttle effect. To overcome these obstacles, various strategies have been proposed, including the incorporation of carbon-based materials as a matrix for sulfur, the use of polar materials, and modifications to the separators, etc. [1].
Graphene oxide (GO) is a highly advantageous host material used in Lithium-sulfur batteries owing to its superior electronic conductivity, extensive specific surface area, and advantageous mechanical flexibility. These properties make GO well-suited for the integration of sulfur particles, thereby promoting more efficient electron transfer and improving the overall effectiveness of the composite material [2].
MXenes are a diverse group of 2D early transition-metal carbides, nitrides or carbonitrides. Their surfaces, made up of transition metals (such as Ti, V, Zr, and Nb) and termination groups such as -O, -OH and -F are highly hydrophilic and form strong bonds with polysulfides. This makes MXenes promising for preventing polysulfide shuttling and enhancing the stability of Li-S batteries [3].
Using carbon-based materials from natural biomass waste, like rice husk (RH), is popular for being cost-effective, renewable, and sustainable. These materials also have intrinsic micro and mesoporosity, making RH a promising source for low-cost, porous carbons. For the modification of Li-S battery separator, a key approach is creating composites of carbon and MXene. This combination offers numerous active sites for efficient electrochemical charge transfer and strong adsorption of lithium polysulfides (LiPSs). The composite effectively captures LiPSs through both chemical and physical interactions and helps manage volume expansion during battery cycling [4].
GO/S and GPC/MXene composites were synthesized and characterized using SEM, TEM, XPS, and XRD. SEM images confirmed the successful removal of "A" layers from the MAX phases, showing structural changes.
Electrochemical tests were performed with CR2032 coin cells. A slurry of 80 wt% GO/S, 10 wt% conductive acetylene black, and 10 wt% polyvinylidene fluoride binder in N-methyl-2-pyrrolidone was coated onto carbon-coated aluminum foil to make the cathode. Additionally, the GPC/MXene composite was coated onto a Celgard 2400 separator. The GO/S cathodes with bare separator achieved an initial discharge capacity of 1210.71 mAh/g, while with GPC/Mxene coated separator reached 1632.9 mAh/g. After 100 cycles, their capacities were 864.47 mAh/g and 1011.88 mAh/g, respectively, highlighting their potential for Li-S battery applications.