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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Anion Modulation: Enabling Highly Conductive Stable Polymer Electrolytes for Solid-State Li-Metal Batteries.
Liyi Zhao1, Qingyu Dong1, Yueqi Wang1
1i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, 215123, P. R. China.
Angewandte Chemie (International Ed. in English)
|November 4, 2024
Summary
Researchers developed an anion-modulated polymer electrolyte (AMPE) for high-voltage lithium metal batteries. This novel AMPE enhances ionic conductivity and forms a stable interface, enabling longer battery life.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Solid polymer electrolytes (SPEs) are crucial for high-energy solid-state lithium metal batteries.
- Challenges include achieving both high ionic conductivity and good interfacial compatibility in SPEs.
Purpose of the Study:
- To propose a new design concept for anion-modulated polymer electrolytes (AMPEs) for high-voltage lithium metal batteries.
- To enhance ionic conductivity and interfacial stability for improved battery performance.
Main Methods:
- Designed AMPEs by incorporating high-voltage-resistant, high charge density units, and an anion receptor (boron-containing molecule).
- Investigated the interaction between the anion receptor and anions (TFSI-) to promote Li+ generation and stable interphase formation.
- Fabricated and tested all-solid-state Li|AMPE|LiCoO2 cells.
Main Results:
- Achieved high ionic conductivity of 3.80×10⁻⁴ S/cm.
- Successfully suppressed lithium dendrite formation.
- Demonstrated a cycle life of 700 cycles at 4.40 V in a Li|AMPE|LiCoO2 cell.
Conclusions:
- The anion-modulated polymer electrolyte design concept is effective for high-performance solid-state lithium metal batteries.
- This approach offers a pathway to overcome key challenges in SPE development for high-voltage applications.
Keywords:
Anion receptor unitAnion-derived mosaic-like SEIAnion-modulated polymer electrolyteHigh-voltage lithium metal batteryHigh-voltage-resistant unitMore Related Videos
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