Catalyst-Free Dynamic Networks for Recyclable, Self-Healing Solid Polymer Electrolytes

Brian B. Jing, Christopher M. Evans

Research output: Contribution to journalArticlepeer-review

Abstract

Polymer networks with dynamic covalent cross-links act as solids but can flow at high temperatures. They have been widely explored as reprocessable and self-healing materials, but their use as solid electrolytes is limited. Here we report poly(ethylene oxide)-based networks with varying amounts of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to understand the impact of a salt on the ion transport and network dynamics. We observed that the conductivity of our dynamic networks reached a maximum of 3.5 × 10-4 S/cm at an optimal LiTFSI concentration. Rheological measurements showed that the amount of LiTFSI significantly affects the mechanical properties, as the shear modulus varies between 1 and 10 MPa and the stress relaxation by 2 orders of magnitude. Additionally, we found that these networks can efficiently dissolve back to pure monomers and heal to recover their conductivity after damage, showing the potential of dynamic networks as sustainable solid electrolytes.

Original languageEnglish (US)
Pages (from-to)18932-18937
Number of pages6
JournalJournal of the American Chemical Society
Volume141
Issue number48
DOIs
StatePublished - Dec 4 2019

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Catalyst-Free Dynamic Networks for Recyclable, Self-Healing Solid Polymer Electrolytes'. Together they form a unique fingerprint.

Cite this