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Related Concept Videos

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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Molecular Engineering Enabled In Situ 3D Cross-Linked and Thermo-Electrochemically Stable Poly(1,3-dioxolane) Solid

Keding Chen1,2, Xiaolong Shi1,2, Yanghuan Shen1,2

  • 1State Key Laboratory of Precision Blasting, Jianghan University, Wuhan, 430056, China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 23, 2025
PubMed
Summary

A new cross-linked quasi-solid electrolyte (CPDOL-DMA QSE) enhances lithium metal battery safety and performance. It offers a wide electrochemical stability window and stable cycling at elevated temperatures.

Keywords:
cross‐linked networkin situ polymerizationpoly(1,3‐dioxolane)solid polymer electrolytesthermal stability

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Poly(1,3-dioxolane) (PDOL) solid polymer electrolytes have limited applications due to narrow electrochemical stability windows and poor thermal stability.
  • Unstable terminal hydroxyl groups in PDOL hinder its performance in lithium metal batteries.

Purpose of the Study:

  • To design and synthesize a novel poly(1,3-dioxolane) dimethacrylate (PDOL-DMA) for improved solid polymer electrolytes.
  • To enhance the electrochemical and thermal stability of electrolytes for lithium metal batteries.

Main Methods:

  • Synthesis of poly(1,3-dioxolane) dimethacrylate (PDOL-DMA).
  • Fabrication of a cross-linked quasi-solid electrolyte (CPDOL-DMA QSE).
  • Electrochemical testing, including stability window and cycling performance evaluation.
  • Thermal stability assessment using microcalorimetry and accelerated calorimetry.

Main Results:

  • The CPDOL-DMA QSE exhibits a wide electrochemical stability window of 4.5 V vs. Li+/Li.
  • Achieved a high Li+ transference number of 0.64, facilitating ion transport.
  • Demonstrated excellent cycling stability with 83% capacity retention after 400 cycles at 25 °C.
  • Maintained 82% capacity retention after 200 cycles at 80 °C, indicating thermal stability.
  • Confirmed high safety through microcalorimetry and accelerated calorimetry due to high oxygen content.

Conclusions:

  • The cross-linked network in CPDOL-DMA QSE improves lithium salt dissociation and Li+ transport.
  • PDOL-DMA is a promising material for developing stable and safe solid polymer electrolytes for lithium metal batteries.
  • This research offers valuable insights into designing high-performance polyether polymer electrolytes with enhanced thermo-electrochemical stability.