Kim Guk-Tae, Passerini Stefano, Carewska Maria, Appetecchi Giovanni Battista
Helmholtz Institute Ulm-Karlsruhe Institute of Technology, Helmholtzstrasse 11, 89081 Ulm, Germany.
Karlsruher Institute of Technology (KIT), P.O. Box 3640, 76021 Eggenstein-Leopoldshafen, Germany.
Membranes (Basel). 2018 Jul 10;8(3):41. doi: 10.3390/membranes8030041.
Li⁺-conducting polyethylene oxide-based membranes incorporating -butyl--methylpyrrolidinium bis(trifluoromethanesulfonyl)imide are used as electrolyte separators for all-solid-state lithium polymer batteries operating at medium-high temperatures. The incorporation of the ionic liquid remarkably improves the thermal, ion-transport and interfacial properties of the polymer electrolyte, which, in combination with the wide electrochemical stability even at medium-high temperatures, allows high current rates without any appreciable lithium anode degradation. Battery tests carried out at 80 °C have shown excellent cycling performance and capacity retention, even at high rates, which are never tackled by ionic liquid-free polymer electrolytes. No dendrite growth onto the lithium metal anode was observed.
包含丁基甲基吡咯烷鎓双（三氟甲磺酰）亚胺的锂离子传导聚环氧乙烷基膜被用作中高温运行的全固态锂聚合物电池的电解质隔膜。离子液体的加入显著改善了聚合物电解质的热性能、离子传输性能和界面性能，再加上即使在中高温下也具有较宽的电化学稳定性，使得在没有任何明显锂阳极降解的情况下能够实现高电流速率。在80℃下进行的电池测试显示出优异的循环性能和容量保持率，即使在高电流速率下也是如此，而无离子液体的聚合物电解质从未实现过这些性能。未观察到锂金属阳极上有枝晶生长。
