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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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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...
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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Multisite Crosslinked Poly(ether-urethane)-Based Polymer Electrolytes for High-Voltage Solid-State Lithium Metal

Fei Pei1, Yimeng Huang2, Lin Wu1

  • 1State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Advanced Materials (Deerfield Beach, Fla.)
|October 25, 2024
PubMed
Summary

This study introduces a novel crosslinked polymer electrolyte for high-voltage lithium-metal batteries, enhancing safety and energy density. The new material demonstrates excellent conductivity, mechanical strength, and a long cycle life for advanced battery applications.

Keywords:
cross‐linked polymer electrolyteshigh energy densityhigh‐voltage cathodeslewis acid‐rich MOFssolid‐state Li‐metal batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Solid-state polymer electrolytes (SPEs) are crucial for high-energy-density and safe high-voltage lithium-metal batteries.
  • Existing SPEs suffer from poor mechanical strength, low ionic conductivity, and unstable high-voltage interfaces.
  • Overcoming these limitations is key to realizing the full potential of next-generation batteries.

Purpose of the Study:

  • To develop a novel crosslinked poly(ether-urethane)-based SPE with enhanced properties for high-voltage lithium-metal batteries.
  • To improve Li+ transport, mechanical stability, and interfacial compatibility.
  • To demonstrate the practical applicability of the developed SPE in high-energy-density battery systems.

Main Methods:

  • Fabrication of a crosslinked poly(ether-urethane)-based SPE using amino-modified Zr-porphyrin-based metal-organic frameworks (ZrMOF) as cross-linking nodes.
  • Characterization of the SPE's ionic conductivity, mechanical strength, and electrochemical stability.
  • Testing of Li||Li symmetric cells and LiNi0.8Co0.1Mn0.1O2||Li cells to evaluate cycle life and performance.

Main Results:

  • Achieved high Li+ conductivity (5.7 × 10-4 S cm-1 at 30°C) and a high Li+ transference number (0.84).
  • Demonstrated robust mechanical strength with a record cycle life of 8000 hours in Li||Li symmetric cells.
  • Enabled a high discharge capacity (182 mAh g-1 at 0.3 C over 500 cycles) and a high energy density of 446 Wh kg-1 in a 1.5-Ah pouch cell.

Conclusions:

  • The novel crosslinked SPE exhibits superior ionic conductivity, mechanical robustness, and electrochemical stability.
  • The incorporation of ZrMOF effectively enhances Li+ transport and structural integrity.
  • The developed SPE shows significant promise for practical application in high-voltage solid-state lithium-metal batteries.