Search NASA⌕ Search

DOE OSTI · 1730617

Materials Data on Sb8Cl2O15 by Materials Project

Abstract

Sb8O13Cl2O2 crystallizes in the monoclinic C2 space group. The structure is three-dimensional and consists of two hydrogen peroxide molecules and one Sb8O13Cl2 framework. In the Sb8O13Cl2 framework, there are four inequivalent Sb4+ sites. In the first Sb4+ site, Sb4+ is bonded to five O2- atoms to form corner-sharing SbO5 square pyramids. There are a spread of Sb–O bond distances ranging from 1.94–2.05 Å. In the second Sb4+ site, Sb4+ is bonded in a 5-coordinate geometry to four O2- and one Cl1- atom. There are a spread of Sb–O bond distances ranging from 1.95–2.55 Å. The Sb–Cl bond length is 3.09 Å. In the third Sb4+ site, Sb4+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Sb–O bond distances ranging from 1.93–2.33 Å. In the fourth Sb4+ site, Sb4+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Sb–O bond distances ranging from 1.92–2.22 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Sb4+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to two Sb4+ and two Cl1- atoms. There are one shorter (3.28 Å) and one longer (3.43 Å) O–Cl bond lengths. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two Sb4+ and one Cl1- atom. The O–Cl bond length is 3.23 Å. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to three Sb4+ and one Cl1- atom. The O–Cl bond length is 3.38 Å. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Sb4+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to three Sb4+ and one Cl1- atom. The O–Cl bond length is 3.45 Å. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to three Sb4+ atoms. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 4-coordinate geometry to four O2- atoms. In the second Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent Sb4+ and six O2- atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-05-02. Materials Data on Sb8Cl2O15 by Materials Project. https://doi.org/10.17188/1730617

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↗