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Flexible, Mechanically Robust, Solid-State Electrolyte Membrane with Conducting Oxide-Enhanced 3D Nanofiber Networks
Mengmeng Zhang1,2, Peng Pan1,2, Zhongling Cheng1,2
1Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, P.R. China.
Nano Letters
|June 8, 2021
Summary
Researchers developed a new 3D network using lithium lanthanum zirconium oxide (LLZO) nanoparticles in polymer nanofibers. This flexible, lightweight composite electrolyte offers improved mechanical strength and ionic conductivity for advanced batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Three-dimensional (3D) lithium-ion (Li-ion) conducting ceramic networks, like Li7La3Zr2O12 (LLZO), are promising for polymer composites.
- Brittle ceramic nanofibers in current 3D networks limit mechanical adaptability in composite electrolytes.
Purpose of the Study:
- To develop a novel 3D ion-conducting network with enhanced mechanical properties and ionic conductivity.
- To create a lightweight, flexible, and robust composite electrolyte membrane for improved battery performance.
Main Methods:
- Synthesis of a new 3D ion-conducting network using highly loaded LLZO nanoparticles reinforced with conducting polymer nanofibers.
- Creation of a lightweight, continuous, and interconnected LLZO-enhanced 3D network structure.
Main Results:
- The developed LLZO-enhanced 3D network exhibits superior mechanical robustness and structural flexibility compared to brittle ceramic nanofibers.
- The composite electrolyte membrane demonstrates high ionic conductivity and a high surface area.
- This design overcomes limitations of ceramic-only nanoparticles, nanowires, or nanofibers in polymer electrolytes.
Conclusions:
- A new generation of composite electrolyte membrane has been developed, offering a promising design principle for all-round properties.
- The LLZO-enhanced 3D network provides a viable alternative to conventional ceramic nanofibers for advanced battery applications.
