Thin, deformable, and safety-reinforced plastic crystal polymer electrolytes for high-performance flexible lithium-ion batteries

Keun Ho Choi, Sung Ju Cho, Se Hee Kim, Yo Han Kwon, Je Young Kim, Sang Young Lee

Research output: Contribution to journalArticlepeer-review

126 Citations (Scopus)

Abstract

A new class of highly thin, deformable, and safety-reinforced plastic crystal polymer electrolytes (N-PCPEs) is demonstrated as an innovative solid electrolyte for potential use in high-performance flexible lithium-ion batteries with aesthetic versatility and robust safety. The unusual N-PCPEs are fabricated by combining a plastic crystal polymer electrolyte with a porous polyethylene terephthalate (PET) nonwoven. Herein, the three-dimensional reticulated plastic crystal polymer electrolyte matrix is formed directly inside the PET nonwoven skeleton via in-situ UV-crosslinking of ethoxylated trimethylolpropane triacrylate (ETPTA) monomer, under co-presence of plastic crystal electrolyte. The PET nonwoven is incorporated as a compliant skeleton to enhance mechanical/dimensional strength of N-PCPE. Owing to this structural uniqueness, the N-PCPE shows significant improvements in the film thickness and deformability with maintaining advantageous features (such as high ionic conductivity and thermal stability) of the PCE. Based on structural/ physicochemical characterization of N-PCPE, its potential application as a solid electrolyte for flexible lithium-ion batteries is explored by scrutinizing the electrochemical performance of cells. The high ionic conductance of N-PCPE, along with its excellent deformability, plays a viable role in improving cell performance (particularly at high current densities and also mechanically deformed states). Notably, the cell assembled with N-PCPE exhibits stable electrochemical performance even under a severely wrinkled state, without suffering from internal short-circuit failures between electrodes.

Original languageEnglish
Pages (from-to)44-52
Number of pages9
JournalAdvanced Functional Materials
Volume24
Issue number1
DOIs
Publication statusPublished - 2014 Jan 8

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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