Search NASA⌕ Search

DOE OSTI · 1728410

Materials Data on Fe4Co(BiO3)5 by Materials Project

Abstract

Fe4Co(BiO3)5 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to five O2- atoms to form distorted corner-sharing FeO5 trigonal bipyramids. There are a spread of Fe–O bond distances ranging from 1.87–2.04 Å. In the second Fe3+ site, Fe3+ is bonded to five O2- atoms to form distorted corner-sharing FeO5 trigonal bipyramids. There are a spread of Fe–O bond distances ranging from 1.84–2.05 Å. In the third Fe3+ site, Fe3+ is bonded to five O2- atoms to form distorted corner-sharing FeO5 trigonal bipyramids. There are a spread of Fe–O bond distances ranging from 1.84–2.03 Å. In the fourth Fe3+ site, Fe3+ is bonded to five O2- atoms to form distorted corner-sharing FeO5 trigonal bipyramids. There are a spread of Fe–O bond distances ranging from 1.86–2.07 Å. Co3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Co–O bond distances ranging from 1.76–2.05 Å. There are five inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.23–2.94 Å. In the second Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.19–3.05 Å. In the third Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.23–2.92 Å. In the fourth Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.24–2.93 Å. In the fifth Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.24–2.93 Å. There are fifteen inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Co3+ and two Bi3+ atoms to form distorted OCo2Bi2 tetrahedra that share corners with four OCo2Bi2 tetrahedra and edges with four OFeCoBi2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Fe3+ and two Bi3+ atoms to form distorted OFe2Bi2 tetrahedra that share corners with four OCo2Bi2 tetrahedra and edges with four OFe2Bi2 tetrahedra. In the third O2- site, O2- is bonded to two equivalent Fe3+ and two Bi3+ atoms to form a mixture of distorted edge and corner-sharing OFe2Bi2 tetrahedra. In the fourth O2- site, O2- is bonded to two equivalent Fe3+ and two Bi3+ atoms to form a mixture of distorted edge and corner-sharing OFe2Bi2 tetrahedra. In the fifth O2- site, O2- is bonded to two equivalent Fe3+ and two Bi3+ atoms to form distorted OFe2Bi2 tetrahedra that share corners with four OCo2Bi2 tetrahedra and edges with four OFe2Bi2 tetrahedra. In the sixth O2- site, O2- is bonded to one Fe3+, one Co3+, and two equivalent Bi3+ atoms to form distorted OFeCoBi2 tetrahedra that share corners with four OFeCoBi2 tetrahedra and edges with four OCo2Bi2 tetrahedra. In the seventh O2- site, O2- is bonded to two Fe3+ and two equivalent Bi3+ atoms to form distorted OFe2Bi2 tetrahedra that share corners with four OFeCoBi2 tetrahedra and edges with four OFe2Bi2 tetrahedra. In the eighth O2- site, O2- is bonded to two Fe3+ and two equivalent Bi3+ atoms to form a mixture of distorted edge and corner-sharing OFe2Bi2 tetrahedra. In the ninth O2- site, O2- is bonded to two Fe3+ and two equivalent Bi3+ atoms to form a mixture of distorted edge and corner-sharing OFe2Bi2 tetrahedra. In the tenth O2- site, O2- is bonded to one Fe3+, one Co3+, and two equivalent Bi3+ atoms to form distorted OFeCoBi2 tetrahedra that share corners with four OFeCoBi2 tetrahedra and edges with four OCo2Bi2 tetrahedra. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to one Co3+ and three Bi3+ atoms. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to one Fe3+ and three Bi3+ atoms. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Fe3+ and three Bi3+ atoms. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Fe3+ and three Bi3+ atoms. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Fe3+ and three Bi3+ atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-30. Materials Data on Fe4Co(BiO3)5 by Materials Project. https://doi.org/10.17188/1728410

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↗