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FTIR studies of PVC/PMMA blend based polymer electrolytes
S Ramesh1, Koay Hang Leen, K Kumutha
1Faculty of Engineering & Science, Universiti Tunku Abdul Rahman, Jalan Genting Kelang, Setapak, 53300 Kuala Lumpur, Malaysia. ramesh@mail.utar.edu.my
Summary
This study details polymer electrolytes made from polyvinyl chloride-polymethyl methacrylate blends, lithium triflate salt, and plasticizers, with silica fillers enhancing ion mobility. FTIR analysis confirms complexation and interactions, crucial for battery applications.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Polymer electrolytes are vital for advanced battery technologies.
- Developing stable and conductive polymer electrolytes remains a key challenge.
- Composite fillers can enhance the performance of polymer electrolytes.
Purpose of the Study:
- To prepare and characterize polymer electrolytes based on PVC/PMMA blends.
- To investigate the complexation and interactions within the polymer electrolyte system.
- To evaluate the effect of silica (SiO2) as a composite filler on electrolyte properties.
Main Methods:
- Preparation of polymer electrolytes using polyvinyl chloride-polymethyl methacrylate (PVC/PMMA) blends, lithium triflate (LiCF3SO3), ethylene carbonate (EC), dibutyl phthalate (DBP), and silica (SiO2).
- Fourier Transform Infrared (FTIR) spectroscopy to confirm complexation and analyze molecular interactions.
- Analysis of spectral shifts to identify interactions between polymer chains, salt, plasticizers, and filler.
Main Results:
- FTIR studies confirmed complexation between PVC/PMMA blends.
- Observed spectral shifts indicated interactions between Li+ ions and PVC, PMMA, and plasticizers.
- Increased silica content led to a higher number of free ethylene carbonate molecules, suggesting improved ion mobility.
Conclusions:
- The prepared polymer electrolytes exhibit complexation and interactions essential for ionic conductivity.
- Silica filler plays a role in plasticizer behavior and potentially enhances ion transport.
- These findings contribute to the development of novel polymer electrolytes for energy storage applications.
