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Exploring silicon nanoparticles and nanographite-based anodes for lithium-ion batteries
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).ORCID iD: 0000-0002-7324-9400
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2024 (English)In: Journal of materials science. Materials in electronics, ISSN 0957-4522, E-ISSN 1573-482X, Vol. 35, no 21, article id 1465Article in journal (Refereed) Published
Abstract [en]

This study investigates the performance of silicon nanoparticles (Si NPs) and silicon nanographite (SiNG) composite-based anodes for lithium-ion batteries (LiBs). Si offers a promising alternative to traditional graphite anodes due to its higher theoretical capacity, despite encountering challenges such as volume expansion, pulverization, and the formation of a solid electrolyte interface (SEI) during lithiation. SiNPs anode exhibited initial specific capacities of 1568.9 mAh/g, decreasing to 1137.6 mAh/g after 100th cycles, with stable Li–Si alloy phases and high Coulombic efficiency (100.48%). It also showed good rate capability, retaining 1191.3 mAh/g at 8400 mA g−1 (2.82C), attributed to its carbon matrix structure. EIS indicated charge transfer with RB of 3.9 Ω/cm−2 and RCT of 11.4 Ω/cm−2. Contrastingly, SiNG composite anode had an initial capacity of 1780.7 mAh/g, decreasing to 1297.5 mAh/g after 100 cycles. Its composite structure provided cycling stability, with relatively stable capacities after 50 cycles. It exhibited good rate capability (1191.3 mAh/g at 8399.9 mA g−1), attributed to its carbon matrix structure. Electrochemical impedance spectroscopy showed higher resistances for RB of 4.2 Ω/cm−2 and RCT of 15.6 Ω/cm−2 compared to SiNPs anode. These findings suggest avenues for improving energy storage devices by selecting and designing suitable anode materials.

Place, publisher, year, edition, pages
Springer Nature , 2024. Vol. 35, no 21, article id 1465
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Materials Chemistry
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URN: urn:nbn:se:miun:diva-52005DOI: 10.1007/s10854-024-13140-zScopus ID: 2-s2.0-85199420697OAI: oai:DiVA.org:miun-52005DiVA, id: diva2:1885845
Funder
Swedish Energy Agency, 39038-2The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), IB-2018 7535Mid Sweden UniversityAvailable from: 2024-07-26 Created: 2024-07-26 Last updated: 2024-08-08

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Patil, RohanPhadatare, Manisha

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