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Updated: May 25, 2026
Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Construction of single lithium-ion conducting solid-state electrolyte by amorphous metal-organic framework
Lingjie Huang1, Hanqi Zhao1, Mengyu Liu1
1State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, State Key Laboratory of Advanced Optical Polymer and Manufacturing Technology, College of Environment and Safety Engineering, College of Chemistry and Molecular Engineering, Qingdao Battery Safety and Energy Storage Technology Innovation Center, Qingdao University of Science and Technology, Qingdao 266042, PR China.
Researchers developed amorphous metal-organic frameworks (MOFs) for solid-state electrolytes, enhancing ion conduction and interface contact. This breakthrough enables stable lithium-ion battery performance with uniform lithium deposition.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Solid-state electrolytes are crucial for efficient ionic conduction.
- Metal-organic frameworks (MOFs) offer potential but face interfacial challenges with polymers.
- Crystalline MOFs exhibit mismatches with amorphous polymer electrolytes.
Purpose of the Study:
- To overcome interfacial issues between MOFs and polymers in solid-state electrolytes.
- To develop high-speed ion transfer routes using amorphous MOFs.
- To enhance lithium-ion (Li+) transport and deposition in composite polymer electrolytes (CPEs).
Main Methods:
- Converting crystalline MOFs into an amorphous state rich in open metal sites (OMSs) and dangling bonds.
- Fabricating composite polymer electrolytes (CPEs) using amorphous MOFs and polymers.
- Characterizing ion transfer, interface contact, and electrochemical performance.
Main Results:
- Achieved a Li+ transference number of 0.87 and ionic conductivity of 0.71 mS cm-1.
- Demonstrated uniform Li+ deposition, crucial for battery stability.
- Exhibited stable cycling for over 2400 hours in Li||Li cells.
- Maintained 84% capacity after 500 cycles in Li||NCM811 cells at 0.2 C.
Conclusions:
- Amorphous MOFs effectively create high-speed ion transfer pathways and tight interfaces in CPEs.
- The developed CPEs significantly improve Li+ management and battery cycle life.
- This approach offers a promising strategy for advanced solid-state lithium-ion batteries.
