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All-Graphitic Multilaminate Mesoporous Membranes by Interlayer-Confined Molecular Assembly
Qingfu Cai1, Jing Wang1, Yucong Jiao1
1State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200433, China.
Small (Weinheim an Der Bergstrasse, Germany)
|May 20, 2021
Summary
Researchers developed a novel method to create multilayer mesoporous graphene membranes. These membranes enhance lithium-sulfur battery performance by preventing polysulfide shuttle and lithium dendrite growth, advancing energy storage solutions.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Layered mesoporous graphene offers combined benefits of graphene and porous materials for energy storage.
- Developing high-performance graphene-based materials is crucial for advanced energy applications.
Purpose of the Study:
- To present a new interlayer-confined molecular assembly method for constructing all-graphitic multilaminate membranes (MMG⊂rGO).
- To demonstrate the application of these membranes as dual-functional interlayers in lithium-sulfur (Li-S) batteries.
Main Methods:
- Utilized hybrid assembly of iron-oleate complexes and organically modified graphene oxide (GO) sheets.
- Employed confined pyrolysis of precursors within GO interlayers to template mesoporous graphene formation.
- Fabricated multilayer mesoporous graphene (MMG⊂rGO) membranes with reduced graphene oxide (rGO) sheets.
Main Results:
- Successfully constructed MMG⊂rGO membranes with monolayer mesoporous graphene (MMG) sandwiched between rGO sheets.
- Demonstrated the formation of carbon-coated Fe3O4 nanocrystal arrays as intermediates for templating.
- Showcased improved performance in Li-S batteries due to suppressed polysulfide shuttle and Li dendrite growth.
Conclusions:
- The molecular-based hybrid assembly is effective for synthesizing densely packed multilayer mesoporous graphene.
- MMG⊂rGO membranes show significant potential as dual-functional interlayers for high-performance electrochemical energy storage devices like Li-S batteries.
