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Advanced Perspective towards Improvement, Usage, and Recycle of Graphite Anodes in Lithium Ion Batteries by Surface Modification Using Carbon-Coated Fe3O4 Nanospindles

Moradi Ghadi, Bahar
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416926753

Abstract Details

2014, Master of Science (MS), Ohio University, Chemical Engineering (Engineering and Technology).
Graphite is currently the state-of-the-art anode material for most of the commercial lithium ion batteries. Current status and future demand of flake graphite in the market suggests that flake graphite could become a critical material in near future for countries such as United States. As one of the potential solutions to meet the future demand of graphite, recycling flake graphite from its different waste resources was proposed. The limitation of current technologies and a new perspective towards the future concept of "battery recycling" were also pointed out. Several aging mechanisms affecting used graphite anodes as challenges in recycling battery-grade flake graphite from spent lithium ion batteries were introduced. In an attempt to solve the mentioned concerns, surface modification of graphite anodes using carbon-coated Fe3O4 nanospindles (C-Fe3O4 NSs) was studied to increase the quality of aged graphite anodes. A thin layer of synthesized C-Fe3O4 NSs was coated on the surface of graphite anodes to prevent direct contact of graphite's surface and electrolyte. The effect of C-Fe3O4 NSs on the dischargecharge performance and cycling behavior of graphite was investigated. Moreover, the electrochemical performance was studied by electrochemical impedance spectroscopy. The results indicate that C-Fe3O4 coating decreased growth of solid electrolyte interface (SEI) film on the surface of graphite and prevented intercalation of solvated lithium ions. Additionally, the C-Fe3O4 film increased the capacity of graphite, and improved the long term cycle-ability. However, the impedance analysis indicated more resistance in case of C-Fe3O4 coated graphite which is due to low ionic conductivity of Fe3O4 compared to graphite.
Gerardine Botte (Advisor)
126 p.
Chemical Engineering
Lithium ion batteries; Graphite; Recycling; Surface modification; Fe3O4 nanospindles

Recommended Citations

Citations

  • Moradi Ghadi, B. (2014). Advanced Perspective towards Improvement, Usage, and Recycle of Graphite Anodes in Lithium Ion Batteries by Surface Modification Using Carbon-Coated Fe3O4 Nanospindles [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416926753

    APA Style (7th edition)

  • Moradi Ghadi, Bahar. Advanced Perspective towards Improvement, Usage, and Recycle of Graphite Anodes in Lithium Ion Batteries by Surface Modification Using Carbon-Coated Fe3O4 Nanospindles. 2014. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416926753.

    MLA Style (8th edition)

  • Moradi Ghadi, Bahar. "Advanced Perspective towards Improvement, Usage, and Recycle of Graphite Anodes in Lithium Ion Batteries by Surface Modification Using Carbon-Coated Fe3O4 Nanospindles." Master's thesis, Ohio University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416926753

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Ohio University and OhioLINK.