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05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Ion transport in small-molecule and polymer electrolytes
Chang Yun Son1, Zhen-Gang Wang1
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
The Journal of Chemical Physics
|September 16, 2020
Summary
Emerging electrolytes like polymer and concentrated liquid systems offer safer alternatives to flammable organic electrolytes in lithium-ion batteries. This review connects ion transport to molecular properties, guiding future electrolyte design.
Area of Science:
- Materials Science
- Electrochemistry
- Physical Chemistry
Background:
- Flammable organic electrolytes limit lithium-ion battery safety and performance.
- Solid-state polymer electrolytes and concentrated liquid electrolytes (e.g., water-in-salt, ionic liquids) are promising alternatives.
- Understanding ion transport is crucial for optimizing these next-generation electrolytes.
Purpose of the Study:
- To review and synthesize current knowledge on ion transport and polymer dynamics in liquid and polymer electrolytes.
- To compare similarities and differences between these electrolyte types.
- To theoretically link macroscopic transport properties to microscopic molecular characteristics.
Main Methods:
- Literature review of experimental and theoretical findings.
- Comparative analysis of ion transport mechanisms in various electrolytes.
- Theoretical framework connecting macroscopic coefficients to molecular properties (solvation, concentration, molecular weight, ion pairing, correlated motion).
Main Results:
- Identified universal features in ion transport and polymer dynamics across different electrolyte systems.
- Established connections between molecular-level properties and macroscopic ion transport.
- Highlighted the importance of solvation environment, salt concentration, and polymer characteristics.
Conclusions:
- Ion transport in advanced electrolytes shares universal principles governed by molecular interactions and dynamics.
- Future electrolyte design requires precise control over molecular properties and advanced modeling.
- Key areas for development include negative transference numbers and predictive multiscale modeling.
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