Search NASA⌕ Search

DOE OSTI · 1685363

Materials Data on CsReN2 by Materials Project

Abstract

CsReN2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are eight inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to two Cs1+ and twelve N3- atoms. There are one shorter (3.78 Å) and one longer (3.79 Å) Cs–Cs bond lengths. There are a spread of Cs–N bond distances ranging from 3.46–3.75 Å. In the second Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to two Cs1+ and twelve N3- atoms. There are one shorter (3.77 Å) and one longer (3.79 Å) Cs–Cs bond lengths. There are a spread of Cs–N bond distances ranging from 3.45–3.74 Å. In the third Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to one Cs1+ and twelve N3- atoms. The Cs–Cs bond length is 3.79 Å. There are a spread of Cs–N bond distances ranging from 3.46–3.73 Å. In the fourth Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to one Cs1+ and twelve N3- atoms. The Cs–Cs bond length is 3.78 Å. There are a spread of Cs–N bond distances ranging from 3.47–3.72 Å. In the fifth Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to four Cs1+ and twelve N3- atoms. There are one shorter (3.74 Å) and one longer (3.77 Å) Cs–Cs bond lengths. There are a spread of Cs–N bond distances ranging from 3.39–3.84 Å. In the sixth Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to four Cs1+ and twelve N3- atoms. There are one shorter (3.73 Å) and one longer (3.76 Å) Cs–Cs bond lengths. There are a spread of Cs–N bond distances ranging from 3.38–3.84 Å. In the seventh Cs1+ site, Cs1+ is bonded in a 7-coordinate geometry to four Cs1+ and twelve N3- atoms. There are a spread of Cs–N bond distances ranging from 3.37–3.87 Å. In the eighth Cs1+ site, Cs1+ is bonded in a 10-coordinate geometry to two equivalent Cs1+ and ten N3- atoms. There are a spread of Cs–N bond distances ranging from 3.37–3.71 Å. There are eight inequivalent Re5+ sites. In the first Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. There is one shorter (1.88 Å) and three longer (1.89 Å) Re–N bond length. In the second Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. There is one shorter (1.88 Å) and three longer (1.89 Å) Re–N bond length. In the third Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. All Re–N bond lengths are 1.88 Å. In the fourth Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. There is one shorter (1.88 Å) and three longer (1.89 Å) Re–N bond length. In the fifth Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. There is one shorter (1.88 Å) and three longer (1.89 Å) Re–N bond length. In the sixth Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. All Re–N bond lengths are 1.89 Å. In the seventh Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. All Re–N bond lengths are 1.88 Å. In the eighth Re5+ site, Re5+ is bonded to four N3- atoms to form corner-sharing ReN4 tetrahedra. There is three shorter (1.88 Å) and one longer (1.89 Å) Re–N bond length. There are sixteen inequivalent N3- sites. In the first N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the second N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the third N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the fourth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the fifth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the sixth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the seventh N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the eighth N3- site, N3- is bonded in a linear geometry to five Cs1+ and two Re5+ atoms. In the ninth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the tenth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the eleventh N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the twelfth N3- site, N3- is bonded in a linear geometry to five Cs1+ and two Re5+ atoms. In the thirteenth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the fourteenth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the fifteenth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms. In the sixteenth N3- site, N3- is bonded in a linear geometry to six Cs1+ and two Re5+ atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-30. Materials Data on CsReN2 by Materials Project. https://doi.org/10.17188/1685363

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↗