NaNiO2
sodium nickelate
NaNiO2 is a stable, semiconducting layered oxide used primarily as a cathode material in sodium-ion battery research.
About sodium nickelate
NaNiO2 belongs to the family of layered sodium transition-metal oxides, characterized by its stable structural arrangement on the convex hull. As a semiconducting material, it plays a vital role in the development of electrochemical energy storage systems where efficient ion transport and structural integrity are paramount.
Its significance lies in its potential as a high-performance cathode material for next-generation sodium-ion batteries. The material is the subject of extensive research due to its ability to facilitate stable cycling, making it a critical focus for researchers aiming to move beyond lithium-based technologies.
Key Properties
Cross-validated computational properties for sodium nickelate, 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.
Synthesis Routes
Literature-extracted synthesis procedures targeting NaNiO2.
Applications
Where sodium nickelate is used.
Frequently Asked Questions
Common questions about sodium nickelate, answered from cross-validated data.
What is NaNiO2?
NaNiO2 is a stable, semiconducting layered oxide used primarily as a cathode material in sodium-ion battery research.
What is NaNiO2 used for?
What is the band gap of NaNiO2?
Is NaNiO2 a metal, semiconductor, or insulator?
Is NaNiO2 thermodynamically stable?
How many polymorphs of NaNiO2 are known?
How is NaNiO2 synthesized?
What elements does NaNiO2 contain?
Where does the data for NaNiO2 come from?
How It Compares
Within the layered sodium transition-metal oxides class.
Within the group of layered sodium transition-metal oxides, NaNiO2 stands out as a highly studied material compared to counterparts like NaFeO2 or NaMnO2. While many members of this class exhibit diverse structural variations, NaNiO2 is distinguished by its thermodynamic stability and its specific electronic properties that favor its application in battery architectures over more complex oxides like Na2Ti3O7.
Related Compounds
Other Layered Sodium Transition-Metal Oxides in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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