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Hydrogen sieving and storage in fullerene intercalated graphite.
Agnieszka Kuc1, Lyuben Zhechkov, Serguei Patchkovskii
1Technische Universität Dresden, Fachbereich Chemie, D-01062 Dresden, Germany.
Nano Letters
|January 11, 2007
Summary
Density-functional simulations confirm C60 fullerene structures in graphite. This material can sieve hydrogen gas but requires further tuning for effective hydrogen storage applications.
Area of Science:
- Materials Science
- Computational Chemistry
- Chemical Engineering
Background:
- Fullerenes, specifically C60, can be intercalated into graphite structures.
- Understanding the properties of such composite materials is crucial for potential applications.
Purpose of the Study:
- To confirm the geometrical properties of C60 intercalated in graphite using computational methods.
- To evaluate the potential of this material for molecular hydrogen storage via physisorption.
Main Methods:
- Density-functional theory (DFT)-based computer simulations were employed.
- Free energy calculations were performed to assess hydrogen adsorption.
Main Results:
- The geometrical structure of C60 intercalated in graphite was successfully confirmed.
- The material demonstrates an ability to sieve molecular hydrogen (H2) from heavier gases.
- Current H2 storage capacity is insufficient for technical applications without modification.
Conclusions:
- The synthesized C60-graphite material has confirmed structural properties.
- While capable of gas sieving, its current hydrogen storage capacity needs improvement.
- Further optimization, such as reducing intercalated fullerene content, is recommended for practical hydrogen storage.
