Co5O8
Co5O8 is a metallic cobalt oxide conversion material being researched for its potential as a high-capacity anode in electrochemical energy storage.
About Co5O8
Co5O8 is a cobalt-based conversion oxide that exhibits metallic electronic character. Its status as a near-hull phase suggests that it is a viable candidate for synthesis and further experimental investigation within the broader family of transition metal oxides.
This material is primarily studied for its role as an anode in advanced electrochemical energy storage systems. By leveraging its conversion reaction mechanism, it offers a pathway to high-capacity performance, making it a subject of interest for researchers optimizing next-generation battery technologies.
Key Properties
Cross-validated computational properties for Co5O8, 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 Co5O8, 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 | 0.00 | 0.0240 | -6.958 | 5.58 |
| F-43m (No. 216) | Cubic | — | — | — | 5.32 |
| F-43m (No. 216) | Cubic | — | — | — | 5.72 |
| F-43m (No. 216) | Cubic | — | — | — | 5.52 |
| F-43m (No. 216) | — | — | — | — | — |
| — | — | — | — | — | 5.32 |
| C2/m (No. 12) | — | — | — | — | — |
Applications
Where Co5O8 is used.
Frequently Asked Questions
Common questions about Co5O8, answered from cross-validated data.
What is Co5O8?
Co5O8 is a metallic cobalt oxide conversion material being researched for its potential as a high-capacity anode in electrochemical energy storage.
What is Co5O8 used for?
What is the band gap of Co5O8?
Is Co5O8 a metal, semiconductor, or insulator?
Is Co5O8 thermodynamically stable?
What is the crystal structure of Co5O8?
What is the density of Co5O8?
How many polymorphs of Co5O8 are known?
What elements does Co5O8 contain?
Where does the data for Co5O8 come from?
How It Compares
Within the conversion oxide anodes class.
Within the class of conversion oxide anodes, Co5O8 occupies a unique position compared to more common cobalt oxides like Co3O4 or CoO. While these simpler oxides are widely characterized, Co5O8 represents a more complex stoichiometry that challenges traditional synthesis routes, offering a distinct structural framework for studying ion storage kinetics.
Related Compounds
Other Conversion Oxide Anodes in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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