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UV-cured gel polymer electrolytes based on poly (ethylene glycol) and organo-modified nanoclays for lithium ions batteries
Abstract Next-generation electrolytes for Lithium Ion Batteries (LIBs) must provide increased durability, reliability, safety, and scalability to meet the even more stringent technical requirements of crucial industries such as e-mobility. A promising strategy to merge these technical needs is the development of easy-to-prepare gel polymer electrolytes (GPEs) able to ensure satisfactory conductivity, high stability, and reduced flammability. In this study, we propose the preparation of novel nanocomposite GPEs through one-pot in-situ photo-polymerization (UV-curing), which turns out to be of great interest due to its low-cost, solvent-free and energy-saving characteristics. Poly (ethylene glycol) dimethacrylate (PEG-DMA) was used as hosting polymer matrix, while 1 M Lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) in ethylene carbonate/dimethyl carbonate (EC/DMC) was used as electrolyte solution. Organo-modified montmorillonite (fMt, intercalated with CTAB) was synthesized and tested as a nanofiller. Both materials and GPEs were characterized by a combination of experimental techniques including FTIR, XRD, SEM, and DMA. Noteworthy, a thorough and systematic study of the lithium-ion transport properties in the prepared GPEs was carried out using pulsed-field gradient nuclear magnetic resonance (PFG-NMR) and electrochemical impedance spectroscopy (EIS). This preliminary study demonstrated the gP-fMt combines ease of preparation and excellent safety (i.e., thermomechanical stability up to 250 °C and nonflammability) with satisfactory lithium transport properties.
Highlights PEG-based nanocomposite membranes for LIBs were prepared by easy and scalable UV-curing process. Organo-modified Mt. (fMt) were synthesized by intercalation of CTAB and tested as filler. Introduction of fMt promotes lithium mobility while reducing leaching of carbonate solvents. The nanocomposite exhibited higher t Li+ with a conductivity of ca. 0.4 mS cm−1 at room temperature. gP-fMt did not catch a fire after ignition thus showing good potential as GPEs for safer LIBs.
UV-cured gel polymer electrolytes based on poly (ethylene glycol) and organo-modified nanoclays for lithium ions batteries
Abstract Next-generation electrolytes for Lithium Ion Batteries (LIBs) must provide increased durability, reliability, safety, and scalability to meet the even more stringent technical requirements of crucial industries such as e-mobility. A promising strategy to merge these technical needs is the development of easy-to-prepare gel polymer electrolytes (GPEs) able to ensure satisfactory conductivity, high stability, and reduced flammability. In this study, we propose the preparation of novel nanocomposite GPEs through one-pot in-situ photo-polymerization (UV-curing), which turns out to be of great interest due to its low-cost, solvent-free and energy-saving characteristics. Poly (ethylene glycol) dimethacrylate (PEG-DMA) was used as hosting polymer matrix, while 1 M Lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) in ethylene carbonate/dimethyl carbonate (EC/DMC) was used as electrolyte solution. Organo-modified montmorillonite (fMt, intercalated with CTAB) was synthesized and tested as a nanofiller. Both materials and GPEs were characterized by a combination of experimental techniques including FTIR, XRD, SEM, and DMA. Noteworthy, a thorough and systematic study of the lithium-ion transport properties in the prepared GPEs was carried out using pulsed-field gradient nuclear magnetic resonance (PFG-NMR) and electrochemical impedance spectroscopy (EIS). This preliminary study demonstrated the gP-fMt combines ease of preparation and excellent safety (i.e., thermomechanical stability up to 250 °C and nonflammability) with satisfactory lithium transport properties.
Highlights PEG-based nanocomposite membranes for LIBs were prepared by easy and scalable UV-curing process. Organo-modified Mt. (fMt) were synthesized by intercalation of CTAB and tested as filler. Introduction of fMt promotes lithium mobility while reducing leaching of carbonate solvents. The nanocomposite exhibited higher t Li+ with a conductivity of ca. 0.4 mS cm−1 at room temperature. gP-fMt did not catch a fire after ignition thus showing good potential as GPEs for safer LIBs.
UV-cured gel polymer electrolytes based on poly (ethylene glycol) and organo-modified nanoclays for lithium ions batteries
Lufrano, Ernestino (author) / Coppola, Luigi (author) / Nicotera, Isabella (author) / Simari, Cataldo (author)
Applied Clay Science ; 246
2023-10-11
Article (Journal)
Electronic Resource
English
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