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Synthesis and Characterization of Graphene/Tin (IV) Sulfide (SnS₂) Hybrid Nanostructures as Anode Material for Ionic Batteries

Haji Bagheri, Majid | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54164 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Esfandiar, Ali
  7. Abstract:
  8. In the current century, an energy storage is one of the critical and important factors affecting on human life. Rechargeable batteries, specially Lithium ion batteries (LIBs), can be considered as ideal energy storage devices including various advantages e.g. high energy and power densities. In this work, Tin IV sulfide (SnS2) and its composites, making by conductive materials e.g. Reduced Graphene Oxide (SnS2@rGO), are prepared during two different synthesis methods consisting of Hydrothermal and Hot-bath, and their properties are investigated as anode material in LIB. The structural and electrochemical analyses demonstrated that the composite sample prepared by hot-bath method exhibited the best properties among the others. In details, the SnS2@rGO presented discharge capacity of 1062 mAh g-1 after 500 cycles at current density of 5 A g-1. However, it showed low cycling performance in Lithium ion cell. Hence, graphene nanosheets with smaller size are utilized to preparing SnS2@rGO composite, resulting in high cycle life, capacity retention of 70% after 1000 cycles at high current density of 5 A g-1. It can be related to captured and stabilized SnS2 structure by graphene nanosheets which is beneficial to reduce volume changes of SnS2 crystal structure during repetitive charge and discharges processes even at high current density
  9. Keywords:
  10. Graphene ; Transmission Metal Dichalcogenides (TMDs) ; Lithium Ion Batteries ; Tin Sulfide ; Rechargeable Lithium Ion Batteries ; Hybrid Nanostructures

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