Related Experiment Video
Updated: Jun 24, 2025
07:20
Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
Published on: January 20, 2023
2.6K
Shear force effect of the dry process on cathode contact coverage in all-solid-state batteries
Dongkyu Lee1, Yejin Shim1,2, Youngsung Kim3
1School of Mechanical Engineering, Korea University, Seoul, Republic of Korea.
Nature Communications
|June 4, 2024
Summary
Dry electrode processing significantly improves all-solid-state battery performance by increasing electrolyte coverage on active materials. This enhanced contact boosts stability and electrochemical capabilities for next-generation batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- All-solid-state batteries offer enhanced safety and energy density compared to traditional lithium-ion batteries.
- Limited electrode-electrolyte contact in solid-state batteries impedes stability and electrochemical performance, hindering commercialization.
- The fabrication process critically influences the electrode-electrolyte interface in solid-state batteries.
Purpose of the Study:
- To systematically investigate the impact of shear force in dry electrode processing on all-solid-state battery performance.
- To quantify the 'coverage' factor—the electrolyte-covered surface area of active materials—across different electrode fabrication methods.
- To elucidate the relationship between electrode fabrication, coverage, and electrochemical performance using a physics-based model.
Main Methods:
- Comparison of binder-free hand-mixed pellets, wet-processed electrodes, and dry-processed electrodes.
- Quantification of electrolyte coverage using digitally processed images.
- Electrochemical testing to evaluate rate capability and cyclability.
- Application of a physics-based electrochemical model to analyze solid diffusion and active material utilization.
Main Results:
- Dry-processed electrodes exhibited significantly higher electrolyte coverage (67.2%) compared to pellets (30.6%) and wet electrodes (33.3%).
- Higher coverage in dry electrodes correlated with superior rate capability and cyclability.
- The electrochemical model confirmed that increased coverage enhances active material utilization by improving solid-state diffusion.
Conclusions:
- Electrode fabrication methods, particularly dry processing, play a crucial role in achieving intimate electrode-electrolyte contact in all-solid-state batteries.
- Electrolyte coverage is a critical factor determining the electrochemical performance and stability of solid-state batteries.
- Optimizing dry electrode processing to maximize coverage is essential for advancing the commercial viability of all-solid-state battery technology.
Related Concept Videos
01:30Electrogravimetric Analysis: Overview
220
Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
To test the completeness of the...
220
01:08Electrodeposition
625
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
625