Ionic Liquids Based Electrolytes Stability at Electrode Surfaces
This project is focused on understanding the interaction mechanisms of halogen-free ionic liquids based electrolytes with metal electrode surfaces. The new halogen-free ionic liquids are designed and synthesized to get electrolytes with lower viscosity, higher conductivity, wider electrochemical window and higher stability at the electrode surfaces compared to the existing electrolytes.
Conventional organic solvent based electrolytes have a number of drawbacks such as toxicity, risk of leakage, high flammability, high vapour pressure, and low thermal and modest electrochemical stability. By designing novel ionic liquids based electrolytes having reasonable compatibility and controlled stability at various metal electrodes will allow for their practical applications in next-generation batteries.
The electrolytes are characterized using multinuclear liquid Nuclear magnetic resonance spectroscopy (NMR), and solid-sate NMR, Pulse-Field Gradient (PFG) NMR, FTIR, MS, Raman spectroscopic techniques. Important physicochemical properties of newly synthesized electrolytes such as thermal behaviour (thermal stability, glass-transition, solid-solid transition (for plastic crystals) and decomposition temperatures) are measured using Thermogravimetric Analysis/Differential Scanning Calorimetry (TG/DSC), while density and viscosity are determined using densitometer and microviscometer, water content are determined using Karl Fisher titration. The electrochemical properties are characterized using potentiostat/galvanostat coupled with an Autolab Microcell HC for temperature-controlled experiments.
The project is financed by the Swedish Research Council.
Contact
Faiz Ullah Shah
- Professor
- 0920-491291
- faiz.ullah@ltu.se
- Faiz Ullah Shah
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