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Dual-Solvent Supramolecular Assembly Enables Ampere-Hour Halide All-Solid-State Pouch Cell
Shutao Zhang1,2,3, Jiamin Fu1,2, Guantai Hu1,2
1Eastern Institute for Advanced Study, Ningbo Institute of Digital Twin, Eastern Institute of Technology, Ningbo, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 24, 2026
Summary
Researchers developed a scalable slurry coating method for halide solid electrolyte films and all-solid-state pouch cells. This breakthrough enables high-performance all-solid-state batteries for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Halide solid electrolytes (SSEs) are crucial for next-generation all-solid-state batteries (ASSBs).
- Scalable fabrication of halide SSE films and large-scale all-solid-state pouch cells (ASSPCs) using slurry coating remains a significant challenge.
- Existing methods often struggle with binder content, slurry viscosity, and film uniformity.
Purpose of the Study:
- To develop a scalable slurry coating strategy for fabricating uniform halide SSE films.
- To enable the production of ampere-hour-scale all-solid-state pouch cells (ASSPCs).
- To overcome limitations in binder content and slurry viscosity for practical ASSPC manufacturing.
Main Methods:
- A dual-solvent supramolecular assembly strategy using methylcyclohexane and decane was employed.
- This method precisely controlled the chain organization of a multiblock copolymer binder (SEEPS).
- Low-binder, high-viscosity slurries were formulated for uniform halide SSE film formation, minimizing InCl3 surface precipitation.
Main Results:
- Uniform Li3InCl6/Li6-xPS5-xCl1+x bilayer SSE films with high ionic conductivity (1.26 mS/cm) were fabricated.
- The SSE films demonstrated mechanical robustness and electrochemical stability.
- All-solid-state batteries (ASSBs) retained 71.3% capacity after 600 cycles, and a 1.45 Ah halide ASSPC showed 95.1% capacity retention over 100 cycles.
Conclusions:
- The developed dual-solvent supramolecular assembly strategy offers a practical and scalable pathway for halide SSE film fabrication.
- This approach facilitates the production of high-performance, large-scale halide all-solid-state pouch cells.
- The findings bridge the gap between laboratory innovations and the commercial deployment of advanced all-solid-state batteries.
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