[2PS-176]
Cryo-TEM Based Structural and Interfacial Analysis of Structure Property Correlations in Ionic Liquid@MOF Composite Electrolytes
발표자김동영 (광주과학기술원)
연구책임자이은지 (광주과학기술원)
Abstract
Low-temperature lithium-ion batteries are limited by sluggish Li+ transport and interfacial instability, leading to polarization and rapid performance decay. Here, we present an ionic liquid@metal–organic framework (IL@MOF) composite electrolyte and use cryogenic transmission electron microscopy (Cryo-TEM) to directly evaluate interfacial changes after subzero cycling. A nanoporous MOF host accommodates the ionic liquid within its porous framework, enabling tailored physicochemical and transport characteristics under low-temperature conditions. The resulting IL@MOF electrolyte shows improved electrochemical stability at low temperatures. Clear Cryo-TEM visualization of the electrode/electrolyte interface reveals a uniform and stable solid electrolyte interphase (SEI), indicating mitigated interfacial degradation during cold operation. These Cryo-TEM-guided insights highlight IL@MOF composites as a practical platform for stable interfaces in cold-environment energy-storage systems.