Si2W
Si2W is a stable, semimetallic tungsten silicide used as a structural component in the design of high-performance silicon-based battery anodes.

About Si2W
Si2W is a stable, near-zero-gap intermetallic silicide that plays a critical role in the development of advanced silicon-based anode materials. Its position on the convex hull underscores its structural integrity, making it a reliable candidate for electronic and energy storage applications where stability is paramount. The material is well-documented in structural databases, reflecting its significance in modern materials science research. It is primarily investigated for its potential to improve the cycling performance and structural durability of silicon anodes in lithium-ion batteries. By integrating tungsten into the silicon framework, researchers aim to mitigate the mechanical degradation typically associated with pure silicon during lithiation cycles.
Key Properties
Cross-validated computational properties for Si2W, aggregated across 4 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.
Applications
Where Si2W is used.
Frequently Asked Questions
Common questions about Si2W, answered from cross-validated data.
What is Si2W?
Si2W is a stable, semimetallic tungsten silicide used as a structural component in the design of high-performance silicon-based battery anodes.
What is Si2W used for?
What is the band gap of Si2W?
Is Si2W a metal, semiconductor, or insulator?
Is Si2W thermodynamically stable?
How many polymorphs of Si2W are known?
What elements does Si2W contain?
Where does the data for Si2W come from?
How It Compares
Within the silicon anode materials class.
Within the diverse class of silicon anode materials, Si2W stands out for its thermodynamic stability compared to more volatile or metastable silicides. While materials like Mg2Si or NaSi are often studied for their specific electrochemical reactivity, Si2W provides a robust, metallic-like framework that contrasts with the semiconducting nature of elemental silicon or the complex structural variations found in MoSi2.
Related Compounds
Other Silicon Anode Materials in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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