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High Quality Pyrazinoquinoxaline-Based Graphdiyne for Efficient Gradient Storage of Lithium Ions
Lei Gao1, Xun Ge2, Zicheng Zuo3
1The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P.R. China.
Nano Letters
|September 4, 2020
Summary
High-quality N-doped graphdiyne (PQ-GDY) was synthesized for lithium storage. This material shows excellent capacity and stability, demonstrating precise atomic doping for advanced applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Atomic precision doping of graphdiyne is crucial for understanding heteroatom effects.
- Graphdiyne's structure-property relationships are key for novel material development.
Purpose of the Study:
- To synthesize and characterize high-quality pyrazinoquinoxaline-based graphdiyne (PQ-GDY) film.
- To investigate the lithium binding affinity and storage capacity of N-doped graphdiyne.
- To explore the potential of PQ-GDY as an anode material for lithium-ion batteries.
Main Methods:
- Bottom-up synthesis of PQ-GDY film.
- First-principle studies (DFT calculations) for structural analysis and binding affinities.
- Lithium-ion half-cell measurements for electrochemical performance evaluation.
Main Results:
- Successful synthesis of high-quality PQ-GDY film.
- Three-stage lithium insertion confirmed, with preferential binding to pyrazine nitrogen.
- Achieved a reversible capacity of 570.0 mA h g-1 at 200 mA g-1 after 800 cycles.
- High capacity utilization rate of 97.2%.
Conclusions:
- PQ-GDY demonstrates excellent lithium storage performance due to precise N-doping.
- The study provides a valuable case for N-doped graphdiyne with atomic precision.
- Pyrazine nitrogen sites are highly effective for lithium binding in PQ-GDY.
