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Related Concept Videos

Ion Exchange01:17

Ion Exchange

635
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...
635

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Related Experiment Video

Updated: Aug 24, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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A poly(ether block amide) based solid polymer electrolyte for solid-state lithium metal batteries.

Changlin Liu1, Yang He1, Xiaowei An2

  • 1Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan.

Journal of Colloid and Interface Science
|October 21, 2022
PubMed
Summary

A novel poly(ether block amide) polymer electrolyte effectively suppresses lithium dendrite growth in solid-state lithium metal batteries. This innovation enhances battery cyclability and longevity for safer, high-energy storage applications.

Keywords:
Lithium dendriteLithium metal batteriesPEBA 2533Solid-electrolyte interphaseSolid-state polymer electrolyte

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state lithium metal batteries (SSLMBs) offer high energy density and security but are hindered by lithium dendrite growth.
  • Lithium dendrites cause interface degradation, dead lithium accumulation, and solid-electrolyte interphase (SEI) growth, rapidly deteriorating SSLMB performance.
  • Developing stable solid electrolytes is crucial for advancing SSLMB technology.

Purpose of the Study:

  • To develop a poly(ether block amide) (PEBA) based polymer electrolyte for SSLMBs.
  • To investigate the electrolyte's ability to suppress lithium dendrite formation.
  • To evaluate the performance and stability of SSLMBs utilizing the novel electrolyte.

Main Methods:

  • A PEBA-based polymer electrolyte was synthesized with lithium bis-(trifluoromethanesulfonyl)imide (LiTFSI).
  • Ionic conductivity was measured at 25 °C.
  • The electrolyte's effect on SEI composition and lithium dendrite suppression was analyzed.
  • Full cells (Li/PEBA-LiTFSI/LiFePO4) were assembled and tested for cyclability and capacity retention at 0.5C and 60 °C.

Main Results:

  • The PEBA 2533-20% LiTFSI electrolyte exhibited an ionic conductivity of 3.0 × 10-5 S cm-1 at 25 °C.
  • The electrolyte enhanced SEI stability by activating TFSI- anions, enriching the SEI layer with lithium fluoride (LiF).
  • The full cell demonstrated excellent cyclability, retaining 94% of its maximum capacity after 200 cycles at 0.5C and 60 °C.
  • The battery achieved nearly 1000 cycles without short-circuiting.

Conclusions:

  • The PEBA-based polymer electrolyte effectively suppresses lithium dendrite growth by forming a LiF-enriched SEI layer.
  • This LiF-rich SEI layer acts as a protective platform, promoting long cycle life in SSLMBs.
  • The developed electrolyte shows significant promise for enabling the development of long-lasting, high-performance SSLMBs.