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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Dynamic Anion Space Gradient Distribution Drives Wide-Temperature-Range All-Solid-State Lithium-Ion Batteries.
Chao Li1, Wenshuo Zhang1, Zhenkun He1
1Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Frontier Science Center for New Organic Matter, Haihe Laboratory of Sustainable Chemical Transformations, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, People's Republic of China.
Angewandte Chemie (International Ed. in English)
|May 15, 2026
Summary
This study introduces dynamic anion functionalization for rare-earth halide solid electrolytes, enhancing ionic conductivity and interfacial stability in all-solid-state lithium batteries (ASSLBs). These batteries operate reliably across extreme temperatures, offering improved capacity, cycle life, and safety.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- All-solid-state lithium batteries (ASSLBs) face challenges including poor ionic conductivity, interfacial instability, and limited operating temperatures.
- Traditional solid electrolytes often struggle to meet the demands for high-performance and safe energy storage solutions.
Purpose of the Study:
- To develop a novel dynamic anion functionalization strategy for designing yttrium-based rare-earth halide solid-state electrolytes (SSEs).
- To overcome key limitations in ASSLBs, aiming for enhanced ionic conductivity, interfacial stability, and a wider operating temperature range.
Main Methods:
- Design and synthesis of yttrium-based rare-earth halide solid-state electrolytes featuring dynamic anions.
- Investigation of anion's role in lattice modification and reversible migration during battery cycling.
- Characterization of interfacial layers (LiF on cathode, Li3N-LiF-LiI on anode) formed by the dynamic anion strategy.
Main Results:
- Dynamic anions enable cation-anion synergistic conduction, significantly boosting ionic conductivity.
- Formation of protective gradient LiF cathode layer and dense Li3N-LiF-LiI anode interphase enhances stability and dendrite suppression.
- Developed ASSLBs exhibit stable operation from -30°C to 140°C, with high specific capacity, extended cycle life, and superior safety.
Conclusions:
- The dynamic anion functionalization strategy presents a new paradigm for developing advanced solid-state electrolytes.
- This approach successfully addresses critical challenges in ASSLBs, paving the way for reliable energy storage under extreme conditions.
- Rare-earth halide SSEs with dynamic anions offer a promising pathway for next-generation high-performance and safe lithium batteries.
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