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Updated: Sep 17, 2025
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
21.8K
High-Performance, Roll-to-Roll Fabricated Scaffold-Supported Solid Electrolyte Separator for Practical
Seok Hun Kang1, Hyobin Lee2, Young-Jin Hong3
1Materials and Components Research Division, Electronics and Telecommunications Research Institute (ETRI), 218 Gajeongno, Yuseong-gu, Daejeon, 34129, Republic of Korea.
Small (Weinheim an Der Bergstrasse, Germany)
|July 1, 2025
Summary
Researchers developed a thin, robust solid electrolyte separator (SES) for all-solid-state batteries (ASBs). This innovation enables higher energy densities, paving the way for safer, next-generation energy storage solutions.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- All-solid-state batteries (ASBs) offer enhanced safety and higher energy density potential compared to traditional lithium-ion batteries (LIBs).
- A key challenge for practical ASBs is the development of thin, mechanically stable solid electrolyte separators (SESs) capable of supporting high energy densities.
Purpose of the Study:
- To fabricate a thin, mechanically robust SES using a scalable tape casting method for high-performance ASBs.
- To evaluate the ionic conductivity, mechanical properties, and performance of the fabricated SES in a prototype battery cell.
- To investigate the impact of scaffold porosity and pore distribution on ion transport and plating behavior through simulations.
Main Methods:
- Fabrication of a 27 µm thin SES using a tape casting method, combining Li6PS5Cl solid electrolyte (SE) with a laser-drilled porous polyimide (PI) scaffold (69% porosity).
- Characterization of the SES's ionic conductance (146 mS cm⁻²) and mechanical properties (7.15 MPa tensile stress at 6% strain).
- Assembly and testing of a LiNi0.83Co0.11Mn0.06O2||Li-In pouch cell using the fabricated SES and simulation studies on ion flux and plating.
Main Results:
- The SES achieved high ionic conductance and demonstrated mechanical integrity suitable for roll-to-roll manufacturing.
- The prototype pouch cell exhibited high gravimetric (322 Wh kg⁻¹) and volumetric (571 Wh L⁻¹) energy densities.
- Simulation results emphasized the critical role of scaffold porosity and pore distribution in ensuring uniform ion flux and preventing lithium plating.
Conclusions:
- The developed thin and robust SES is a viable component for high-energy-density ASBs.
- The scalable fabrication method, including a 4m long prototype, confirms the potential for industrial-scale production.
- Optimizing scaffold design is crucial for maximizing the performance and safety of scaffold-supported SESs in ASBs.
