Li2Si
Li2Si is a metastable, metallic lithium silicide compound primarily researched for its potential to improve the performance and stability of silicon-based anodes in lithium-ion batteries.
About Li2Si
Li2Si is a metallic lithium silicide that plays a critical role in the study of silicon-based anode materials. As a metastable phase within the lithium-silicon system, it represents an important intermediate state during the lithiation and delithiation processes that govern battery performance. Its electronic character as a metal distinguishes it from many other silicon-based compounds, making it a subject of intense interest for understanding charge transport in energy storage devices. Due to its complex structural landscape, it is frequently analyzed to better predict the structural evolution of anodes during cycling. This compound is essential for researchers aiming to mitigate the mechanical degradation typically associated with silicon expansion in battery electrodes.
Key Properties
Cross-validated computational properties for Li2Si, aggregated across 5 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Li2Si. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Synthesis Routes
Literature-extracted synthesis procedures targeting Li2Si.
Applications
Where Li2Si is used.
Frequently Asked Questions
Common questions about Li2Si, answered from cross-validated data.
What is Li2Si?
Li2Si is a metastable, metallic lithium silicide compound primarily researched for its potential to improve the performance and stability of silicon-based anodes in lithium-ion batteries.
What is Li2Si used for?
What is the band gap of Li2Si?
Is Li2Si a metal, semiconductor, or insulator?
Is Li2Si thermodynamically stable?
How many polymorphs of Li2Si are known?
How is Li2Si synthesized?
What elements does Li2Si contain?
Where does the data for Li2Si come from?
How It Compares
Within the silicon anode materials class.
Within the broader class of silicon-based materials, Li2Si stands out for its metallic nature and metastable state compared to the more stable, semiconducting silicides like Mg2Si or the elemental semiconductor Si. While compounds such as MoSi2 or FeSi are often studied for their refractory or magnetic properties, Li2Si is specifically investigated for its electrochemical activity and its role as a transient phase in high-capacity energy storage systems.
Related Compounds
Other Silicon Anode Materials in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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