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Making Electrolyte Lithium Batteries Using Ionic Liquids and Organic Solvents

Ranji, Hassan | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46724 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Gholami, Mohammad Reza
  7. Abstract:
  8. In this work, butyl methylimidazolium tetrafluoroborate and butyl methylimidazolium hexafluorophosphate are used as ionic liquid and lithium perchlorate and lithium hexafluorophosphate as lithium salt. Dimethyl carbonate and propylene carbonate are used as solvent to prepare diffrent kinds of organic - ionic liquids solvent for lithium ion batterries. In preliminary expriment it was distinguished that in the mixture of organic solvent lithium hexaflourophosphat has more conductivity in comparison with lithium perchlorate. There for,in this work, all organic-ionic liquid solvent electrolytes are considered based on lithium hexaflourophosphat salt. Different compositions of organic-ionic liquid solvent were prepared and their physical, chemical and electrochemical properties was studied by various technics, such as electrochemical ampedans spectrum, Linear scanning voltammetry and direct current polarization. Various methods were examined possible composition for preparation of organic-ion liquid solvent whichis suitable to make lithium ion batteries. Conductive meaasurment technic shaws that 10 percent increase in the weight of ionic liquids cause an increase in the conductivity of electrolyte liquid. Since amount of ionic liquid was increased the windows of electrochemical potential was increased about 4\7 volt. Direct current polarization method shows that the addition of ionic liquid to electrolyte liquid causes decrease in the transfer number of lithium ion
  9. Keywords:
  10. Ionic Liquids ; Lithium Ion Batteries ; Organic Solvent ; Liquid Electrolyte ; Organic-Ionic Liquid Solvent Electrolyte

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