Heo, Jinwoo Choi, Yunah Chung, Kyung Yoon Park, Jong Hyeok 2024-01-20T04:03:21Z 2024-01-20T04:03:21Z 2021-09-03 2016-06 2050-7488 https://pubs.kist.re.kr/handle/201004/124027 Phase inversion is a simple process to prepare porous thin films for lithium ion battery (LIB) separators. However, controlling porous morphologies during phase inversions for efficient lithium ionic transportation is a critical issue for more optimized battery performances. Here, we report an LIB separator via phase inversion by selecting non-solvents from the combinatorial approach. Interestingly, the formation of PVdF-HFP skeletons was governed by the controlled phase inversion with various mixtures of water, methanol, ethanol and 2-propanol. For a single non-solvent system, a water-based non-solvent (4 wt% water) was the best choice for the phase-inversion-based PVdF-HFP separators for LIBs. However, when a mixture of 2 wt% water and 3 wt% methanol was used as the non-solvent, the best rate capability and long-term stability were obtained, which led to better LIB performances than those of commercialized polyethylene separators. English ROYAL SOC CHEMISTRY LITHIUM-ION BATTERIES POLYMER ELECTROLYTES CONDUCTIVITY MEMBRANES Controlled pore evolution during phase inversion from the combinatorial non-solvent approach: application to battery separators Article 10.1039/c6ta02472f 1 JOURNAL OF MATERIALS CHEMISTRY A, v.4, no.24, pp.9496 - 9501 JOURNAL OF MATERIALS CHEMISTRY A 4 24 9496 9501 scie scopus 000378946700020 2-s2.0-84975105659 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article LITHIUM-ION BATTERIES POLYMER ELECTROLYTES CONDUCTIVITY MEMBRANES separator secondary battery