Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “NaCoO2”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NaCoO2 by Materials Project

NaCoO2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Na1+ is bonded to six equivalent O2- atoms to form distorted NaO6 octahedra that share corners with six equivalent CoO6 octahedra, edges with six equivalent NaO6 octahedra, and edges with six equivalent CoO6 octahedra. The corner-sharing octahedral tilt angles are 13°. All Na–O bond lengths are 2.34 Å. Co3+ is bonded to six equivalent O2- atoms to form CoO6 octahedra that share corners with six equivalent NaO6 octahedra, edges with six equivalent NaO6 octahedra, and edges with six equivalent CoO6 octahedra. The corner-sharing octahedral tilt angles are 13°. All Co–O bond lengths are 1.96 Å. O2- is bonded to three equivalent Na1+ and three equivalent Co3+ atoms to form a mixture of edge and corner-sharing ONa3Co3 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaCoO2 by Materials Project

NaCoO2 is Caswellsilverite-like structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Na1+ is bonded to six O2- atoms to form distorted NaO6 pentagonal pyramids that share corners with nine equivalent CoO6 octahedra, edges with three equivalent CoO6 octahedra, edges with six equivalent NaO6 pentagonal pyramids, and a faceface with one CoO6 octahedra. The corner-sharing octahedra tilt angles range from 11–48°. There are three shorter (2.38 Å) and three longer (2.44 Å) Na–O bond lengths. Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with nine equivalent NaO6 pentagonal pyramids, edges with six equivalent CoO6 octahedra, edges with three equivalent NaO6 pentagonal pyramids, and a faceface with one NaO6 pentagonal pyramid. All Co–O bond lengths are 2.05 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to three equivalent Na1+ and three equivalent Co3+ atoms. In the second O2- site, O2- is bonded to three equivalent Na1+ and three equivalent Co3+ atoms to form edge-sharing ONa3Co3 octahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaCoO2 by Materials Project

NaCoO2 is Caswellsilverite-like structured and crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Na1+ is bonded to six equivalent O2- atoms to form distorted NaO6 octahedra that share corners with twelve equivalent CoO6 octahedra, edges with six equivalent NaO6 octahedra, and faces with two equivalent CoO6 octahedra. The corner-sharing octahedral tilt angles are 48°. All Na–O bond lengths are 2.41 Å. Co3+ is bonded to six equivalent O2- atoms to form CoO6 octahedra that share corners with twelve equivalent NaO6 octahedra, edges with six equivalent CoO6 octahedra, and faces with two equivalent NaO6 octahedra. The corner-sharing octahedral tilt angles are 48°. All Co–O bond lengths are 2.05 Å. O2- is bonded in a 6-coordinate geometry to three equivalent Na1+ and three equivalent Co3+ atoms.

36 MATERIALS SCIENCE↗