Ge2Si2
Ge2Si2 is a semiconducting germanium-silicon compound being investigated as a potential material for high-performance battery anodes.
About Ge2Si2
Ge2Si2 is a semiconducting compound composed of germanium and silicon, representing a specialized member of the silicon anode materials class. Its electronic properties and structural configuration make it a subject of interest for researchers looking to optimize charge transport in electrochemical energy storage systems.
As a material positioned near the thermodynamic hull, it is considered a viable candidate for synthesis and experimental investigation. Its structural diversity, supported by numerous reported configurations across multiple databases, highlights its potential utility in advanced battery architectures where silicon-based frameworks are prioritized.
Key Properties
Cross-validated computational properties for Ge2Si2, 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.
Reported Structures
Lowest-energy structures reported for Ge2Si2, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| F-43m (No. 216) | cubic | 0.61 | 0.0162 | -11.307 | 3.93 |
| P63mc (No. 186) | hexagonal | 0.41 | 0.0308 | -11.292 | 3.93 |
| P21 (No. 4) | monoclinic | 0.51 | 0.0530 | -11.270 | 3.81 |
| P4/nmm (No. 129) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| P-3m1 (No. 164) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| Pmma (No. 51) | — | — | — | — | — |
| Imma (No. 74) | — | — | — | — | — |
| I41/amd (No. 141) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
Applications
Where Ge2Si2 is used.
Frequently Asked Questions
Common questions about Ge2Si2, answered from cross-validated data.
What is Ge2Si2?
Ge2Si2 is a semiconducting germanium-silicon compound being investigated as a potential material for high-performance battery anodes.
What is Ge2Si2 used for?
What is the band gap of Ge2Si2?
Is Ge2Si2 a metal, semiconductor, or insulator?
Is Ge2Si2 thermodynamically stable?
What is the crystal structure of Ge2Si2?
What is the density of Ge2Si2?
How many polymorphs of Ge2Si2 are known?
What elements does Ge2Si2 contain?
Where does the data for Ge2Si2 come from?
How It Compares
Within the silicon anode materials class.
Within the broader class of silicon-based anode materials, Ge2Si2 occupies a distinct niche compared to established systems like Si or Mg2Si. While Si remains the industry standard for high-capacity anodes, Ge2Si2 offers a unique chemical landscape that may mitigate some of the mechanical degradation issues seen in pure silicon, providing a different structural pathway for ion insertion compared to intermetallic compounds like FeSi or MoSi2.
Related Compounds
Other Silicon Anode Materials in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
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