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Related Concept Videos

Ion Exchange01:17

Ion Exchange

691
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
691

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Related Experiment Video

Updated: Oct 6, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Ultrahigh Elastic Polymer Electrolytes for Solid-State Lithium Batteries with Robust Interfaces.

Tianxiang Zheng1, Ximing Cui1, Ying Chu1

  • 1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.

ACS Applied Materials & Interfaces
|January 18, 2022
PubMed
Summary

Researchers developed an ultrahigh elastic solid polymer electrolyte (SPE) for solid-state lithium batteries. This novel material enhances ionic conductivity and battery performance, addressing key limitations for practical applications.

Keywords:
polyurethane-based electrolytesrobust electrode/electrolyte interfacesolid-state lithium batteryultrahigh elasticity

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Solid polymer electrolytes (SPEs) are crucial for solid-state lithium batteries.
  • Current SPEs face challenges with low ionic conductivity and poor interfacial compatibility.
  • These limitations hinder the practical application of solid-state battery technology.

Purpose of the Study:

  • To develop an ultrahigh elastic SPE with improved ionic conductivity and mechanical properties.
  • To investigate the potential of a novel PU-SN-LiTFSI electrolyte for solid-state lithium batteries.
  • To address the interfacial issues that impede the performance of solid-state batteries.

Main Methods:

  • Synthesized an ultrahigh elastic SPE using cross-linked polyurethane (PU), succinonitrile (SN), and lithium bistrifluoromethanesulfonimide (LiTFSI).
  • Characterized the electrolyte's ionic conductivity, tensile strength, and elongation at room temperature.
  • Assembled and tested a solid-state lithium battery utilizing the developed SPE.

Main Results:

  • The PU-SN-LiTFSI electrolyte achieved an ionic conductivity of 2.86 × 10⁻⁴ S cm⁻¹.
  • Demonstrated exceptional mechanical properties: tensile strength of 3.8 MPa and breaking elongation >3000%.
  • The solid-state lithium battery showed a specific capacity of 150 mAh g⁻¹ at 0.2C and 700 cycles at 0.5C.

Conclusions:

  • The ultrahigh elasticity and robust interfacial properties of the PU-SN-LiTFSI electrolyte significantly improve battery performance.
  • This novel SPE offers a promising strategy to overcome interfacial challenges in solid-state batteries.
  • The developed material exhibits excellent potential for next-generation solid-state lithium battery applications.