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In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
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Ion-Pairing Dynamics Revealed by Kinetically Resolved In Situ FTIR Spectroelectrochemistry during Lithium-Ion Storage
Emma A Cave1, Jarred Z Olson2, Cody W Schlenker1,3,4
1Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States.
ACS Applied Materials & Interfaces
|October 8, 2021
Summary
This study reveals how lithium ions interact at battery electrode surfaces. Optimizing ion pairing in electrolytes could accelerate charging for lithium-ion batteries and supercapacitors.
Area of Science:
- Electrochemistry
- Materials Science
- Spectroscopy
Background:
- Understanding interfacial ion behavior is crucial for designing advanced batteries.
- Experimental challenges hinder the study of ion evolution at electrode interfaces.
Purpose of the Study:
- To establish the first kinetically resolved link between interfacial ion speciation and lithium-ion storage.
- To explore strategies for enhancing fast-charging capabilities in energy storage devices.
Main Methods:
- Utilized in situ attenuated total reflectance (ATR) Fourier-Transform infrared (FTIR) spectroelectrochemistry.
- Applied global target analysis to analyze complex spectroelectrochemical data.
Main Results:
- Demonstrated a correlation between interfacial ion speciation and lithium-ion storage kinetics.
- Identified contact ion pairs (CIPs) as a potentially faster source of lithium ions for charging compared to solvated ions.
Conclusions:
- Manipulating ion pairing in electrolytes is a promising strategy for improving battery charging speeds.
- Findings provide insights for developing next-generation fast-charging lithium-ion batteries and supercapacitors.
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