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Crosslinked ionogels containing a Li-conducting inorganic phase as electrolyte for lithium-metal batteries

Matteo Gandolfo;
2025-01-01
2025
In the quest for the development of safer lithium-metal batteries (LMBs), the integration of inorganic fillers and ionic liquids into polymer matrices has emerged as a promising strategy to enhance safety, ionic conductivity and battery performance. This study introduces a novel composite ionogel (IG) synthesized through a facile one-pot method, incorporating butyl methacrylate (BMA) and poly(ethylene glycol) diacrylate (PEGDA) with the ionic liquid 1-butyl-1-methylpyrrolidinium bis(fluorosulfonyl)imide (PYR14FSI) and garnet Li6.4La3Zr1.4Ta0.6O12 (LLZTO) nanoparticles. A distinctive feature of the approach is the use of an organosilane functionalization of the LLZTO nanoparticles, which ensures their full integration into the polymer matrix during free-radical polymerization. Moreover, this method effectively eliminates the Li2CO3 passivation layer that typically forms on the surface of the LLZTO nanoparticles, thus, further contributing to an enhanced performance. As a result, a LMB with the functionalized LLZTO IG electrolyte delivered more than 160 mA h g−1 with a very good capacity retention of 97.7% after 400 cycles in Li|IG|LFP cells.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11582/369271
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