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Anion-Dependent Redox Pathways Governing Water Splitting in Superconcentrated Lithium Electrolytes
Sagar Ingavale1,2, Pawin Iamprasertkun1,2
1School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Klong Luang, Pathum Thani 12120, Thailand.
ACS Physical Chemistry Au
|June 1, 2026
Summary
Superconcentrated electrolytes enhance electrochemical reactions like hydrogen and oxygen evolution. This study shows platinum electrodes perform well in these concentrated lithium-based solutions, improving energy storage and conversion.
Area of Science:
- Electrochemistry
- Materials Science
- Sustainable Energy
Background:
- Superconcentrated electrolytes offer improved safety and stability over conventional dilute electrolytes.
- Electrochemical Hydrogen Evolution Reaction (HER) and Oxygen Evolution Reaction (OER) are crucial for energy technologies.
- Understanding electrolyte concentration effects on electrode performance is vital for advanced applications.
Purpose of the Study:
- To investigate the electrochemical activity of platinum electrodes in lithium-based electrolytes across a range of concentrations.
- To analyze the kinetics of HER and OER in superconcentrated electrolyte environments.
- To elucidate the influence of electrolyte composition on platinum's catalytic performance.
Main Methods:
- Utilized cyclic voltammetry and linear sweep voltammetry to study electrochemical behavior.
- Examined platinum electrode interactions within lithium-based electrolytes from low to high concentrations.
- Analyzed key electrochemical parameters including redox reactions, overpotentials, and reaction kinetics.
Main Results:
- Superconcentrated electrolytes exhibit an extended electrochemical stability window.
- Platinum electrodes demonstrate significant electrochemical activity in highly concentrated lithium-based electrolytes.
- Electrolyte concentration directly impacts reaction kinetics and catalytic performance.
Conclusions:
- Superconcentrated electrolytes provide a promising platform for enhancing energy storage and conversion.
- Optimizing platinum-based electrocatalysis is achievable by tuning electrolyte composition.
- This research offers insights for developing next-generation sustainable energy solutions.
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