Mechanically Interlocked Polymer Electrolyte with Built-In Fast Molecular Shuttles for All-Solid-State Lithium Batteries

Jiae Seo, Gwang Hee Lee, Joon Hur, Myeong Chang Sung, Ji-Hun Seo, Dong Wan Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The mobility of molecular shuttles inside a mechanically interlocked polymer (MIP) can improve the ionic conductivity and electron transport capacity of a solid polymer electrolyte (SPE) and maintain a mechanically tough structure. The polyrotaxane-based MIP electrolyte with a necklace-like molecular structure exhibits high ionic conductivity (σ = 5.93 × 10−3 S cm−1 at 25 °C and 1.44 × 10−2 S cm−1 at 60 °C), a high Li+ ion transference number (t+ = 0.71), and high electrochemical oxidation stability (≈4.7 V vs Li+/Li). When SPEs are used in Li-based batteries, a high Coulombic efficiency (≥98.5%), an excellent rate capability, and fast charging (≥2C) can be achieved using a “built-in molecular shuttle” design.

Original languageEnglish
JournalAdvanced Energy Materials
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • ASSLBs
  • mechanically interlocked polymers
  • molecular shuttles
  • polyrotaxane
  • solid polymer electrolytes

ASJC Scopus subject areas

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

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