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Updated: Sep 14, 2025
11:04
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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Halogen-Driven Ion Transport Homogenization in 3D Hierarchical MOF for Ultrastable Solid-State Lithium Metal
Xingxing Zhang1,2, Hongli Chen3, Qingmei Su4
1Xi'an Key Laboratory of Advanced photo-electronics Materials and Energy Conversion Device, Technological Institute of Materials & Energy Science (TIMES), Xijing University, Xi'an, 710123, China.
Angewandte Chemie (International Ed. in English)
|July 21, 2025
Summary
This study introduces a new solid-state electrolyte for lithium metal batteries by embedding lithium halides in a metal-organic framework. This design enhances ionic conductivity and stability for high-energy batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state lithium metal batteries (SSLMBs) face challenges with low ionic conductivity, uneven lithium plating, and unstable interfaces.
- Current solid-state electrolytes limit the performance and safety of next-generation batteries.
Purpose of the Study:
- To develop a hierarchical ion-transport network for improved SSLMB performance.
- To investigate the role of confined lithium halides within a metal-organic framework (MOF) and polymer matrix.
Main Methods:
- Confining lithium halides (LiX) within MIL-100(Al) MOF mesoporous cages, integrated with a PVDF-HFP polymer matrix.
- Utilizing structural characterizations, density functional theory (DFT) calculations, and COMSOL simulations.
- Testing the electrochemical performance of the composite electrolyte in SSLMBs.
Main Results:
- The composite electrolyte, particularly with LiI (E-LiI), demonstrated a high Li⁺ transference number (0.88) and improved interfacial kinetics.
- Uniform LiX distribution within the MOF framework and tunable host-guest interactions facilitated continuous Li⁺ transport.
- SSLMBs with E-LiI electrolytes showed excellent cycling stability (100% retention after 600 cycles) and wide-temperature adaptability.
Conclusions:
- The hierarchical ion-conductive framework strategy offers a transformative approach for high-energy-density SSLMBs.
- Confined lithium halides play a crucial role in regulating lithium deposition kinetics and enhancing electrolyte performance.
- This work advances the rational design of advanced solid-state electrolytes for safer and more efficient energy storage.
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