On the Rise of Slurry Electrolysis for Energy Applications.

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Conventional electrochemical systems utilize fixed electrodes, limiting scalability and efficiency.
• Slurry electrolysis offers a novel approach using flowable suspensions of electrochemically active particles.
• This technology enables scalable energy conversion and storage solutions.

Purpose of the Study:

• To review recent advancements in slurry electrolysis across various electrochemical applications.
• To highlight the critical role of the electro-percolation network in charge transport within slurry systems.
• To provide insights into the dynamic evolution and stability of flowable suspensions.

Main Methods:

• Exploration of slurry electrolysis in electrocatalysis, semi-solid flow batteries, and flow-electrode capacitive deionization.
• Utilizing advanced characterization techniques like operando electrochemical impedance spectroscopy (EIS).
• Employing computational fluid dynamics (CFD) and in situ imaging for mechanistic insights.

Main Results:

• Demonstrated the fundamental importance of the electro-percolation network for charge transport in slurry systems.
• Provided mechanistic understanding of flowable suspension dynamics.
• Identified key areas for addressing challenges in practical applications.

Conclusions:

• Slurry electrolysis presents a transformative technology for scalable electrochemical applications.
• Further research is needed to overcome challenges related to electrochemical side reactions and slurry instability.
• Optimizing slurry systems will unlock their full potential in energy conversion and storage.