Controlled pore evolution during phase inversion from the combinatorial non-solvent approach: Application to battery separators

Jinwoo Heo, Yunah Choi, Kyung Yoon Chung, Jong Hyeok Park

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13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)9496-9501
Number of pages6
JournalJournal of Materials Chemistry A
Volume4
Issue number24
DOIs
Publication statusPublished - 2016 Jan 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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