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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 73 records · Page 4
All sourcesNASA NTRSDOE OSTI
DOE OSTI2023

A Self‐Healing Chemistry‐Enabled Organic Cathode for Sustainable and Stable Sodium‐Ion Batteries

Sodium‐on batteries (SIBs) are promising alternatives to lithium‐ion batteries (LIBs) because of the low cost, abundance, and high sustainability of sodium resources. Analogous to LIBs, the high‐capacity electrodes in SIBs always suffer from rapid capacity decay upon long‐term cycling due to the particle pulverization induced by a large volume change. Circumventing particle pulverization plays a critical role in developing high‐energy and long‐life SIBs. Herein, tetrahydroxy‐1,4‐benzoquinone disodium salt (TBDS) that can self‐heal the cracks by hydrogen bonding between hydroxyl group and carbonyl group is employed as a cathode for sustainable and stable SIBs. The self‐healing TBDS exhibits long cycle life of 1000 cycles with a high rate capability up to 2 A g −1 due to the fast Na‐ion diffusion reaction in the TBDS cathode. The intermolecular hydrogen bonding has been comprehensively characterized to understand the self‐healing mechanism. The hydrogen bonding‐enabled self‐healing organic materials are promising for developing high‐energy and long‐cycle‐life SIBs.

25 ENERGY STORAGE↗
DOE OSTI2020

Phenanthroline-strapped calix[4]pyrroles: anion receptors displaying affinity reversal as a function of solvent polarity

Calix[4]pyrroles 1 and 2, diametrically strapped with a phenanthroline via ester and amide linkages, respectively, have been synthesized as anion receptors. It was revealed by 1 H NMR spectroscopic analysis that receptors 1 and 2 possessing both hydrogen bonding donors and acceptors were able to bind the bicarbonate anion (as its tetraethylammonium (TEA + ) or sodium salt) in CDCl 3 , as well as in 15% aqueous DMSO with high affinity and selectivity over other anions. The amide-based receptor 2 contains additional potential hydrogen bonding donors relative to its ester-based congener 1. Nevertheless, in CDCl 3 receptor 1 was found to display a higher affinity for all test anions than receptor 2. In contrast, in 15% aqueous DMSO solution the affinities of receptor 2 for anions, in particular chloride, bicarbonate, and dihydrogen phosphate, were enhanced, whereas those of receptor 1 were reduced dramatically with no appreciable interaction being seen in the case of most test anions considered in this study. These reversals in selectivity and affinities underscore the importance of solvent in regulating the recognition features of seemingly similiar anion binding agents.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2025

Probing the Redox Reactivity of Alkyl Bound Astatine: A Study on the Formation and Cleavage of a Stable At–C Bond

The formation of a stable alkyl At–C bond occurs during the shipment of 211 At on a 3-octanone-impregnated column and the reactivity of 211 At stripped from columns has been studied. The 211 At could not be recovered from the 3-octanone organic phase using nitric acid or sodium hydroxide, even up to 10 and 15.7 M, respectively. Several reducing and oxidizing agents, including hydrazine, hydroxylamine, ascorbic acid, ceric ammonium nitrate, potassium permanganate, sodium hypochlorite, and calcium hypochlorite were used to promote the recovery of 211 At. The most effective reducing agent was hydroxylamine, where ~70% of the 211 At was recovered, while among oxidizing agents ceric ammonium nitrate, potassium permanganate, and sodium hypochlorite all showed near quantitative recovery of 211 At. These results indicate an At–C bond is being formed during the shipment of the column and a redox reaction is required for bond cleavage to occur. Furthermore, DFT calculations have been used to propose several products of an AtO + -3-octanone reaction, with 4-astato-5-hydroxy-octa-3-one being the most probable.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2020

Materials Data on Na3SiTe3 by Materials Project

(Na)3SiTe3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of twelve sodium molecules and two SiTe3 clusters. In each SiTe3 cluster, Si4- is bonded in a tetrahedral geometry to one Si4- and three Te+0.33+ atoms. The Si–Si bond length is 2.38 Å. There are one shorter (2.53 Å) and two longer (2.54 Å) Si–Te bond lengths. There are three inequivalent Te+0.33+ sites. In the first Te+0.33+ site, Te+0.33+ is bonded in a single-bond geometry to one Si4- atom. In the second Te+0.33+ site, Te+0.33+ is bonded in a single-bond geometry to one Si4- atom. In the third Te+0.33+ site, Te+0.33+ is bonded in a single-bond geometry to one Si4- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb3Na by Materials Project

(Rb)3Na is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional and consists of one sodium molecule and one Rb framework. In the Rb framework, Rb is bonded in a 8-coordinate geometry to eight equivalent Rb atoms. All Rb–Rb bond lengths are 4.72 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3DyCl6 by Materials Project

(Na)2NaDyCl6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one NaDyCl6 framework. In the NaDyCl6 framework, Na1+ is bonded to six equivalent Cl1- atoms to form NaCl6 octahedra that share corners with six equivalent DyCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Na–Cl bond lengths are 2.70 Å. Dy3+ is bonded to six equivalent Cl1- atoms to form DyCl6 octahedra that share corners with six equivalent NaCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Dy–Cl bond lengths are 2.62 Å. Cl1- is bonded in a linear geometry to one Na1+ and one Dy3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3Al4O8 by Materials Project

(Na)3(AlO2)4 crystallizes in the cubic Im-3m space group. The structure is three-dimensional and consists of twelve sodium molecules and one AlO2 framework. In the AlO2 framework, Al is bonded to four O atoms to form corner-sharing AlO4 tetrahedra. There is one shorter (1.70 Å) and three longer (1.76 Å) Al–O bond length. There are two inequivalent O sites. In the first O site, O is bonded in a linear geometry to two equivalent Al atoms. In the second O site, O is bonded in a bent 150 degrees geometry to two equivalent Al atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3NdCl6 by Materials Project

(Na)2NaNdCl6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one NaNdCl6 framework. In the NaNdCl6 framework, Na1+ is bonded to six equivalent Cl1- atoms to form NaCl6 octahedra that share corners with six equivalent NdCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Na–Cl bond lengths are 2.71 Å. Nd3+ is bonded to six equivalent Cl1- atoms to form NdCl6 octahedra that share corners with six equivalent NaCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Nd–Cl bond lengths are 2.71 Å. Cl1- is bonded in a linear geometry to one Na1+ and one Nd3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2ScHgF6 by Materials Project

(Na)2ScHgF6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one ScHgF6 framework. In the ScHgF6 framework, Sc2+ is bonded to six equivalent F1- atoms to form ScF6 octahedra that share corners with six equivalent HgF6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Sc–F bond lengths are 2.02 Å. Hg2+ is bonded to six equivalent F1- atoms to form HgF6 octahedra that share corners with six equivalent ScF6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Hg–F bond lengths are 2.50 Å. F1- is bonded in a linear geometry to one Sc2+ and one Hg2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2HgAsCl6 by Materials Project

(Na)2HgAsCl6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one HgAsCl6 framework. In the HgAsCl6 framework, Hg2+ is bonded to six equivalent Cl1- atoms to form HgCl6 octahedra that share corners with six equivalent AsCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Hg–Cl bond lengths are 2.79 Å. As2+ is bonded to six equivalent Cl1- atoms to form AsCl6 octahedra that share corners with six equivalent HgCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All As–Cl bond lengths are 2.51 Å. Cl1- is bonded in a linear geometry to one Hg2+ and one As2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2LiErCl6 by Materials Project

(Na)2LiErCl6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one LiErCl6 framework. In the LiErCl6 framework, Li1+ is bonded to six equivalent Cl1- atoms to form LiCl6 octahedra that share corners with six equivalent ErCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Li–Cl bond lengths are 2.52 Å. Er3+ is bonded to six equivalent Cl1- atoms to form ErCl6 octahedra that share corners with six equivalent LiCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Er–Cl bond lengths are 2.59 Å. Cl1- is bonded in a linear geometry to one Li1+ and one Er3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2TlCuBr6 by Materials Project

(Na)2CuTlBr6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one CuTlBr6 framework. In the CuTlBr6 framework, Cu1+ is bonded to six equivalent Br1- atoms to form CuBr6 octahedra that share corners with six equivalent TlBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cu–Br bond lengths are 2.57 Å. Tl3+ is bonded to six equivalent Br1- atoms to form TlBr6 octahedra that share corners with six equivalent CuBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Tl–Br bond lengths are 2.85 Å. Br1- is bonded in a linear geometry to one Cu1+ and one Tl3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsNaO3 by Materials Project

NaCsO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional and consists of one sodium molecule and one CsO3 framework. In the CsO3 framework, Cs is bonded to six equivalent O atoms to form corner-sharing CsO6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cs–O bond lengths are 2.22 Å. O is bonded in a linear geometry to two equivalent Cs atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2InAgCl6 by Materials Project

(Na)2AgInCl6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one AgInCl6 framework. In the AgInCl6 framework, Ag1+ is bonded to six equivalent Cl1- atoms to form AgCl6 octahedra that share corners with six equivalent InCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–Cl bond lengths are 2.67 Å. In3+ is bonded to six equivalent Cl1- atoms to form InCl6 octahedra that share corners with six equivalent AgCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All In–Cl bond lengths are 2.54 Å. Cl1- is bonded in a linear geometry to one Ag1+ and one In3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2LuAgCl6 by Materials Project

(Na)2LuAgCl6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one LuAgCl6 framework. In the LuAgCl6 framework, Lu3+ is bonded to six equivalent Cl1- atoms to form LuCl6 octahedra that share corners with six equivalent AgCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Lu–Cl bond lengths are 2.56 Å. Ag1+ is bonded to six equivalent Cl1- atoms to form AgCl6 octahedra that share corners with six equivalent LuCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–Cl bond lengths are 2.70 Å. Cl1- is bonded in a linear geometry to one Lu3+ and one Ag1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2TmAgCl6 by Materials Project

(Na)2TmAgCl6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one TmAgCl6 framework. In the TmAgCl6 framework, Tm3+ is bonded to six equivalent Cl1- atoms to form TmCl6 octahedra that share corners with six equivalent AgCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Tm–Cl bond lengths are 2.58 Å. Ag1+ is bonded to six equivalent Cl1- atoms to form AgCl6 octahedra that share corners with six equivalent TmCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–Cl bond lengths are 2.70 Å. Cl1- is bonded in a linear geometry to one Tm3+ and one Ag1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3YCl6 by Materials Project

Na3YCl6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one NaYCl6 framework. In the NaYCl6 framework, Na1+ is bonded to six equivalent Cl1- atoms to form NaCl6 octahedra that share corners with six equivalent YCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Na–Cl bond lengths are 2.70 Å. Y3+ is bonded to six equivalent Cl1- atoms to form YCl6 octahedra that share corners with six equivalent NaCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Y–Cl bond lengths are 2.62 Å. Cl1- is bonded in a linear geometry to one Na1+ and one Y3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2AlAgBr6 by Materials Project

(Na)2AgAlBr6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight sodium molecules and one AgAlBr6 framework. In the AgAlBr6 framework, Ag1+ is bonded to six equivalent Br1- atoms to form AgBr6 octahedra that share corners with six equivalent AlBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–Br bond lengths are 2.81 Å. Al3+ is bonded to six equivalent Br1- atoms to form AlBr6 octahedra that share corners with six equivalent AgBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Al–Br bond lengths are 2.52 Å. Br1- is bonded in a linear geometry to one Ag1+ and one Al3+ atom.

36 MATERIALS SCIENCE↗