Abstract Polymer electrolyte membrane containing potassium bis(trifluoromethanesulfonyl)imide (KTFSI) dissolved in a polymeric solvent of Pebax 2533 demonstrated facilitated transport for effective CO2 separation. Reversible interactions of CO2 with both K+ and TFSI- dissolved in Pebax 2533 were directly observed by both solid state 39K and 13C NMR and FT-IR spectroscopy for the first time, inducing the CO2 carrier activity for the facilitated transport. Additionally, through comparing the CO2 separation performance of LiTF2N, NaTF2N and KTF2N, it was concluded that alkali cation has play an important role in helping to interact with CO2 for the CO2 carrier activity and that K+ was the best as a CO2 carrier among alkali metals used. Consequently, the KTFSI/Pebax 2533 polymer electrolyte membrane showed significant improvement of the CO2 separation performance due to the carrier action of both K+ and TFSI- in the solid state with long-term stability.

中文翻译：

---

CO 2 与溶解在 Pebax 2533 中的 KTFSI 的直接分子相互作用及其在促进 CO 2 传输膜中的应用

摘要 含有溶解在 Pebax 2533 聚合物溶剂中的双（三氟甲磺酰）亚胺钾 (KTFSI) 的聚合物电解质膜显示出促进有效 CO2 分离的传输。CO2 与溶解在 Pebax 2533 中的 K+ 和 TFSI- 的可逆相互作用首次通过固态 39K 和 13C NMR 和 FT-IR 光谱法直接观察到，从而诱导 CO2 载体活性促进传输。此外，通过比较 LiTF2N、NaTF2N 和 KTF2N 的 CO2 分离性能，得出结论，碱金属阳离子在帮助与 CO2 相互作用的 CO2 载体活性方面发挥了重要作用，并且 K+ 是碱金属中最好的 CO2 载体用过的。最后，