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Interfacial Evolution of the Solid Electrolyte Interphase and Lithium Deposition in Graphdiyne-Based Lithium-Ion
Jing Wan1,2, Zicheng Zuo3,2, Zhen-Zhen Shen1
1Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Graphdiyne (GDY) materials show promise for energy storage. Nitrogen doping stabilizes the electrode/electrolyte interface, leading to more uniform lithium deposition and improved battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Graphdiyne (GDY)-based materials are recognized for their unique structures and high performance in electrochemical energy storage applications.
- Understanding the interfacial evolution at the GDY electrode/electrolyte interface is crucial for optimizing battery performance and developing targeted strategies.
Purpose of the Study:
- To investigate the dynamic interfacial evolution at graphdiyne (GDY) and N-doped GDY electrodes during lithium deposition.
- To elucidate the role of N-doping in stabilizing the solid electrolyte interphase (SEI) and homogenizing lithium deposition.
Main Methods:
- Utilizing *in situ* optical microscopy and atomic force microscopy to monitor the GDY and N-doped GDY electrodes.
- Observing the growth and morphology of the solid electrolyte interphase (SEI) and its interaction with lithium deposition.
Main Results:
- Directly tracked the growth and accumulation of flocculent-like SEI on the GDY electrode surface.
- Observed nanoparticle-shaped SEI formation that homogeneously propagates on N-doped GDY, indicating interface stabilization.
- Established a correlation between N-doping, SEI morphology, and homogenized lithium deposition.
Conclusions:
- N-doping significantly enhances the stability and uniformity of the SEI layer in GDY electrodes.
- The findings provide critical insights into the N-doping effects for optimizing GDY-based materials in lithium-ion batteries.
- This research offers effective strategies for advancing GDY materials for electrochemical energy storage.
