| 초록 |
Nonflammable lithium-ion batteries (LIBs) are developed by adapting polymer solid electrolytes, but their insufficient electrochemical performance has not been fully addressed to date. Here, a semi interpenetrating polymer network (semi-IPN) ion-transporting solid film that comprises a UV-curable crosslinked polymer and tailored pyrrolidinium-polyethylene glycol copolyester ion channels (named PNPEG), is reported. PNPEG can solvate Li+ effectively with the help of carbonate solvents. Molecular dynamics (MD) simulations confirm that Li+ transportation is accelerated due to the weaker interaction between PNPEG and Li+ ions than between the solvents and ions. The semi-IPN electrolyte with PNPEG exhibits a flexible, nonflammable nature with an ionic conductivity of 4.2×10−1 mS cm−1 and Li+ transference number of 0.51. The individual pyrrolidinium-Tf2N monomer and PEG chain ratios in PNPEG strongly affect battery performance. |
