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Laser-formed nanoporous graphite anodes for enhanced lithium-ion battery performance
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).ORCID iD: 0009-0003-3972-1227
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).ORCID iD: 0000-0003-2965-0288
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).ORCID iD: 0000-0001-9137-3440
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).ORCID iD: 0000-0002-7057-5139
2024 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 125, no 18, article id 181903Article in journal (Refereed) Published
Abstract [en]

Lithium-ion batteries are pivotal in modern energy storage, commonly utilizing graphite anodes for their high theoretical capacity and long cycle life. However, graphite anodes face inherent limitations, such as restricted lithium-ion storage capacity and slow diffusion rates. Enhancing the porosity of graphite and increasing d-spacing in expanded graphite anodes have been explored to improve lithium-ion diffusion and intercalation. Recent advancements suggest that nanoscale modifications, such as utilizing nano-graphite and graphene, can further enhance performance. Laser processing has emerged as a promising technique for synthesizing and modifying graphite and graphene-related materials, offering control over surface defects and microstructure. Here, we demonstrate an industrially compatible one-step laser processing method to transform a nano-graphite and graphene mixture into a nanoporous matrix, significantly improving lithium-ion battery performance. The laser-processed anodes demonstrated significantly enhanced specific capacities at all charge rates, with improved relative performance at higher charge rates. Additionally, long-term cycling at 1 C showed that laser-processed cells outperformed their non-processed counterparts, with specific capacities of 323 and 241 mAh/g, respectively.

Place, publisher, year, edition, pages
AIP Publishing , 2024. Vol. 125, no 18, article id 181903
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:miun:diva-53103DOI: 10.1063/5.0230156ISI: 001345847600006Scopus ID: 2-s2.0-85209352848OAI: oai:DiVA.org:miun-53103DiVA, id: diva2:1913750
Available from: 2024-11-15 Created: 2024-11-15 Last updated: 2024-12-18Bibliographically approved
In thesis
1. Optimizing laser processing for the production of advanced materials
Open this publication in new window or tab >>Optimizing laser processing for the production of advanced materials
2024 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Lasers, with their unparalleled precision and control, have become vital tools across numerous industries, offering transformative potential for the development of advanced materials. In this research, laser-assisted techniques were employed to develop and optimize functional materials for industrial and energy applications. By leveraging the unique properties of laser light, significant advancements were achieved in three key areas. First, selective laser sintering was employed to create electrically conductive polymer-graphene composites, demonstrating promising electrical conductivity, crucial for applications requiring electromagnetic compatibility. Second, rare-earth-doped nanocrystals were synthesized using ultrashort laser pulses, achieving precise control over nanoparticle size and morphology while maintaining consistent stoichiometry with the bulk material. This synthesis offers potential for applications in photonics due to the stability and tailored properties of the nanocrystal. Third, laser-assisted processing was applied to modify nanographite and nanographite-silicon composite anode materials for lithium-ion batteries. The laser-induced nanoporous structure in graphite-based anodes led to significant improvements in fast charging capabilities and specific capacity. Additionally, the optimization of silicon distribution within the nanographite matrix enhanced battery performance and cycling stability. These findings illustrate the versatility and efficacy of laser-assisted processing in tailoring material properties to meet the growing demands of advanced applications, offering a pathway to the development of next-generation materials with enhanced functionalities.

Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2024. p. 59
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 207
Keywords
laser processing, nanoparticles, lithium-ion batteries, selective laser sintering, laser ablation in liquid, graphite anode
National Category
Materials Engineering
Identifiers
urn:nbn:se:miun:diva-53391 (URN)978-91-89786-89-9 (ISBN)
Presentation
2025-01-15, O102, Holmgatan 10, Sundsvall, 10:00 (English)
Opponent
Supervisors
Available from: 2024-12-19 Created: 2024-12-18 Last updated: 2024-12-19Bibliographically approved

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Bond, LukeAndersson, HenrikHummelgård, MagnusEngholm, Magnus

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