Fabrication of nanoporous polymer membrane with tunable 10-nm pore sizes for long-cycling lithium metal batteries
발표자
오태석 (한국과학기술원)
연구책임자
서명은 (한국과학기술원)
초록
내용
Lithium (Li)-metal batteries (LMBs) are considered a great candidate to enhance energy density by utilizing metallic Li electrodes. On the other hand, the irregular Li+ transport and subsequent dendrite formation must be resolved. The regulating Li+ flux by pore size control was only observed in the <5 nm or >20 nm region, thus limiting the exploration of critical Li⁺ transport phenomena and their impact on improving cell performance. Here, we propose a 3D continuous, functional mesoporous polymer membrane with controllable pore size, synthesized by polymerization-induced microphase separation. Introducing a negatively charged sulfonate group to the pore surface, the Li+ conductivity can be increased, and side reactions on the surface of the lithium electrode through negative ions can be suppressed. This separator enhances Li+ mobility compared to the counteranion, reducing interfacial resistance and promoting uniform Li deposition, resulting in long cyclability.