Search NASA⌕ Search

DOE OSTI · 1318809

Materials Data on CoO2 by Materials Project

Abstract

Lix0CoO2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twelve inequivalent Co4+ sites. In the first Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share a cornercorner with one CoO4 tetrahedra and edges with five CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.79–1.99 Å. In the second Co4+ site, Co4+ is bonded to six O2- atoms to form edge-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.89–1.91 Å. In the third Co4+ site, Co4+ is bonded to six O2- atoms to form edge-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.85–1.91 Å. In the fourth Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share a cornercorner with one CoO4 tetrahedra and edges with five CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.79–1.99 Å. In the fifth Co4+ site, Co4+ is bonded to six O2- atoms to form edge-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.88–1.91 Å. In the sixth Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share a cornercorner with one CoO4 tetrahedra and edges with five CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.80–1.99 Å. In the seventh Co4+ site, Co4+ is bonded to six O2- atoms to form edge-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.86–1.91 Å. In the eighth Co4+ site, Co4+ is bonded to six O2- atoms to form edge-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.88–1.91 Å. In the ninth Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with two equivalent CoO4 tetrahedra and edges with five CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.87–1.90 Å. In the tenth Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with two equivalent CoO4 tetrahedra and edges with five CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.87–1.90 Å. In the eleventh Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with two equivalent CoO4 tetrahedra and edges with five CoO6 octahedra. There is two shorter (1.88 Å) and four longer (1.89 Å) Co–O bond length. In the twelfth Co4+ site, Co4+ is bonded to four O2- atoms to form corner-sharing CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 54–59°. There are a spread of Co–O bond distances ranging from 1.86–1.89 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to two Co4+ atoms. In the second O2- site, O2- is bonded in a water-like geometry to two Co4+ atoms. In the third O2- site, O2- is bonded in a distorted T-shaped geometry to three Co4+ atoms. In the fourth O2- site, O2- is bonded in a water-like geometry to two Co4+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Co4+ atoms. In the seventh O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to four Co4+ atoms. In the eighth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Co4+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the tenth O2- site, O2- is bonded in a distorted T-shaped geometry to three Co4+ atoms. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the twelfth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Co4+ atoms. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted T-shaped geometry to three Co4+ atoms. In the fifteenth O2- site, O2- is bonded in a distorted T-shaped geometry to three Co4+ atoms. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted T-shaped geometry to three Co4+ atoms. In the eighteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the nineteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the twentieth O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the twenty-first O2- site, O2- is bonded in a trigonal planar geometry to three Co4+ atoms. In the twenty-second O2- site, O2- is bonded in a trigonal planar geometry to three Co4+ atoms. In the twenty-third O2- site, O2- is bonded in a 3-coordinate geometry to three Co4+ atoms. In the twenty-fourth O2- site, O2- is bonded in a trigonal planar geometry to three Co4+ atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-30. Materials Data on CoO2 by Materials Project. https://doi.org/10.17188/1318809

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

Cyclic moisture reactivation of calcium sorbents for long duration thermochemical energy storage

The transition to a flexible and reliable energy infrastructure, using electro-thermal energy generation technologies such as geothermal, concentrated solar power, and nuclear, usually demands simultaneous advancement of thermal energy storage (TES) to support on-demand electricity generation and industrial applications while mitigating the inherent intermittency of renewable energy sources and power outages from direct energy generation. Among TES technologies, thermochemical energy storage (TCES) based on calcium looping emerges as a compelling high-power energy storage candidate due to its high reaction enthalpy, compatibility with elevated operating temperatures, and abundance of low-cost materials. However, the long-term durability of calcium-based sorbents for TCES is hindered by surface sintering and particle aggregation, leading to performance degradation over repeated thermal cycles. This study explores a moisture hydration-based strategy to regenerate a degraded calcium sorbent and mitigate performance degradation for long duration TCES. The addition of moisture transforms calcium oxide into calcium hydroxide and produces intercalation water layers, associated with a regenerated surface area and reduced calcium oxide crystallite size. Both these effects are beneficial in restoring the sorbents' reactivity for carbonization. Additionally, an optimized hydration-assisted reactivation protocol balances the recovered energy storage capacity with heating penalty required for moisture removal from hydrated samples, resulting in an enhanced energy storage capacity up to 176% compared to benchmark sorbents that undergo cycling without reactivation after 60 cycles. In conclusion, these results highlight the potential of hydration-assisted reactivation to enhance the long-term performance of TCES, providing an effective pathway to advancing electro-thermal storage technologies.

36 MATERIALS SCIENCE↗