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Published on: November 29, 2010
Lightweight All-Solid-State Pouch Cells Freed from High Stack Pressure
Yue Gong1,2, Yue Ji2,3, Shuangquan Lin2
1Nanling Campus, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Jilin University, Changchun, Jilin, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|August 4, 2026
Summary
All-solid-state batteries (ASSBs) face challenges with high stack pressure, reducing energy density. This study analyzes pressure origins and proposes strategies to lower it for practical electric vehicle applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state electrolytes (SSEs) show ionic conductivity comparable to liquid electrolytes since 2011.
- Commercialization of electric vehicles with ultra-long driving ranges using all-solid-state batteries (ASSBs) is a key goal.
- High stack pressure requirements in ASSBs hinder practical vehicular application by reducing energy density.
Purpose of the Study:
- To analyze the origins of stack pressure requirements in practical all-solid-state pouch cells (ASSPCs).
- To compare ASSPCs with conventional liquid batteries regarding stack pressure.
- To propose strategies for mitigating stack pressure in ASSBs.
Main Methods:
- Comparative analysis of ASSPCs and liquid batteries.
- Examination of material, interfacial, and structural factors contributing to stack pressure.
- Quantitative analysis of stack pressure's effect on cell-to-module energy density efficiency.
Main Results:
- Identified critical factors contributing to high stack pressure in ASSPCs.
- Proposed mitigation strategies to reduce stack pressure from 20 MPa to 5 MPa initially, targeting 2 MPa.
- Quantified the impact of stack pressure on energy density efficiency.
Conclusions:
- Stack pressure is a significant hurdle for ASSB commercialization.
- Reducing stack pressure is crucial for improving the energy density of ASSB modules.
- Design strategies for ASSPCs and module-level pressure management are essential for practical EV applications.
