Quasi-Solid-State Electrolyte Synthesized Using a Thiol–Ene Click Chemistry for Rechargeable Lithium Metal Batteries with Enhanced Safety
journal contributionposted on 14.04.2020, 16:35 by Sungguk Park, Bora Jeong, Da-Ae Lim, Chul Haeng Lee, Kyoung Ho Ahn, Jung Hoon Lee, Dong-Won Kim
Liquid electrolytes currently used in lithium-ion batteries have critical drawbacks such as high flammability, high reactivity toward electrode materials, and solvent leakage. To overcome these issues, most recent research has focused on synthesis and characterization of highly conductive gel-type polymer electrolytes containing large numbers of organic solvents in the polymer matrix. There are still many hurdles to overcome, however, before they can be applied to commercial-level lithium-ion batteries. Since a large amount of organic solvent is required to achieve high ionic conductivity, battery safety is not significantly enhanced. In our study, we synthesized highly conductive quasi-solid-state electrolytes (QSEs) containing an ionically conductive oligomer (polycaprolactone triacrylate) and a small amount of organic solvent by employing click chemistry. In the QSE, polycaprolactone participates in dissociation of lithium salt and migration of lithium ions, resulting in high ionic conductivity. The Li/LiNi0.6Co0.2Mn0.2O2 cell that used this QSE exhibited good cycling performance and enhanced thermal stability, and durability; no organic solvent leakage was observed even under high pressure.
Read the peer-reviewed publication
0.2cycling performancepolymer matrixelectrode materialsleakageconductivitylithium-ion batteriesbattery safetyconductive quasi-solid-state electrolytesclick chemistryRechargeable Lithium Metal BatteriesQuasi-Solid-State Electrolyte SynthesizedEnhanced Safety Liquid electrolyteslithium saltcommercial-level lithium-ion batteriesQSElithium ionspolycaprolactone triacrylateionically conductive oligomerconductive gel-type polymer electrolytes