Search NASA⌕ Search

DOE OSTI · 1269118

Materials Data on Li3Ga(BO3)2 by Materials Project

Abstract

Li3Ga(BO3)2 is Clathrate-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 trigonal pyramids that share a cornercorner with one LiO4 tetrahedra, a cornercorner with one GaO4 tetrahedra, corners with two equivalent LiO4 trigonal pyramids, and edges with two LiO4 trigonal pyramids. There are a spread of Li–O bond distances ranging from 1.93–2.09 Å. In the second Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with three equivalent GaO4 tetrahedra and corners with three LiO4 trigonal pyramids. There are a spread of Li–O bond distances ranging from 1.95–2.07 Å. In the third Li1+ site, Li1+ is bonded to four O2- atoms to form distorted LiO4 trigonal pyramids that share corners with two equivalent LiO4 tetrahedra, corners with two equivalent LiO4 trigonal pyramids, an edgeedge with one GaO4 tetrahedra, and an edgeedge with one LiO4 trigonal pyramid. There are a spread of Li–O bond distances ranging from 1.92–2.31 Å. Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with three equivalent LiO4 tetrahedra, a cornercorner with one LiO4 trigonal pyramid, and an edgeedge with one LiO4 trigonal pyramid. There is three shorter (1.85 Å) and one longer (1.92 Å) Ga–O bond length. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.35–1.42 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.35–1.41 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Li1+ and one B3+ atom. In the second O2- site, O2- is bonded to two Li1+, one Ga3+, and one B3+ atom to form distorted OLi2GaB trigonal pyramids that share corners with two equivalent OLi3B trigonal pyramids and an edgeedge with one OLi2GaB tetrahedra. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Ga3+, and one B3+ atom. In the fourth O2- site, O2- is bonded to three Li1+ and one B3+ atom to form distorted corner-sharing OLi3B trigonal pyramids. In the fifth O2- site, O2- is bonded to two Li1+, one Ga3+, and one B3+ atom to form distorted OLi2GaB tetrahedra that share corners with three equivalent OLi3B trigonal pyramids and an edgeedge with one OLi2GaB trigonal pyramid. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Ga3+, and one B3+ atom.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-07-14. Materials Data on Li3Ga(BO3)2 by Materials Project. https://doi.org/10.17188/1269118

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↗