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At least 55 records · Page 3
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on LiB(HO)4 by Materials Project

LiB(OH)4 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four equivalent BO4 tetrahedra. There are a spread of Li–O bond distances ranging from 1.96–2.05 Å. B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with four equivalent LiO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.47–1.51 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.73 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.67 Å) H–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Li1+, one B3+, and one H1+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one B3+, and two H1+ atoms. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one B3+, and two H1+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one B3+, and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiB(CO2)4 by Materials Project

LiB(C2O4)2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Li1+ is bonded to five O2- atoms to form corner-sharing LiO5 trigonal bipyramids. There are a spread of Li–O bond distances ranging from 1.99–2.31 Å. B3+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of B–O bond distances ranging from 1.47–1.51 Å. There are three inequivalent C3+ sites. In the first C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.23 Å) and one longer (1.32 Å) C–O bond length. In the second C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.22 Å) and one longer (1.34 Å) C–O bond length. In the third C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.23 Å) and one longer (1.32 Å) C–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to one B3+ and one C3+ atom. In the second O2- site, O2- is bonded in a water-like geometry to one B3+ and one C3+ atom. In the third O2- site, O2- is bonded in a water-like geometry to one B3+ and one C3+ atom. In the fourth O2- site, O2- is bonded in a water-like geometry to one Li1+ and one C3+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+ and one C3+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Li1+ and one C3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiB by Materials Project

LiB crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Li is bonded in a 6-coordinate geometry to six equivalent B atoms. All Li–B bond lengths are 2.44 Å. B is bonded in a body-centered cubic geometry to six equivalent Li and two equivalent B atoms. Both B–B bond lengths are 1.56 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiB(S2O7)2 by Materials Project

LiB(S2O7)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six SO4 tetrahedra. There are a spread of Li–O bond distances ranging from 2.14–2.33 Å. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six SO4 tetrahedra. There are a spread of Li–O bond distances ranging from 2.14–2.34 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with four SO4 tetrahedra. There is two shorter (1.47 Å) and two longer (1.48 Å) B–O bond length. In the second B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with four SO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.47–1.49 Å. There are eight inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 8–20°. There are a spread of S–O bond distances ranging from 1.43–1.64 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 21°. There are a spread of S–O bond distances ranging from 1.42–1.67 Å. In the third S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 19–32°. There are a spread of S–O bond distances ranging from 1.42–1.64 Å. In the fourth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 32°. There are a spread of S–O bond distances ranging from 1.42–1.67 Å. In the fifth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of S–O bond distances ranging from 1.42–1.65 Å. In the sixth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of S–O bond distances ranging from 1.42–1.65 Å. In the seventh S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 13–31°. There are a spread of S–O bond distances ranging from 1.43–1.65 Å. In the eighth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two LiO6 octahedra, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 13–24°. There are a spread of S–O bond distances ranging from 1.42–1.65 Å. There are twenty-eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two S6+ atoms. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to two S6+ atoms. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to two S6+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two S6+ atoms. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Li1+ and one S6+ atom. In the tenth O2- site, O2- is bonded in a linear geometry to one Li1+ and one S6+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the twelfth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Li1+ and one S6+ atom. In the fifteenth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the sixteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the seventeenth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the eighteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+ and one S6+ atom. In the nineteenth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the twentieth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+ and one S6+ atom. In the twenty-first O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the twenty-second O2- site, O2- is bonded in a distorted linear geometry to one Li1+ and one S6+ atom. In the twenty-third O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted linear geometry to one Li1+ and one S6+ atom. In the twenty-fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one S6+ atom. In the twenty-sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the twenty-seventh O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the twenty-eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiB(SO4)2 by Materials Project

LiB(SO4)2 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four SO4 tetrahedra. There are a spread of Li–O bond distances ranging from 1.95–1.98 Å. In the second Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four SO4 tetrahedra. There are a spread of Li–O bond distances ranging from 1.98–2.02 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with four SO4 tetrahedra. There is three shorter (1.47 Å) and one longer (1.48 Å) B–O bond length. In the second B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with four SO4 tetrahedra. There is one shorter (1.47 Å) and three longer (1.48 Å) B–O bond length. There are four inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with two BO4 tetrahedra. There are a spread of S–O bond distances ranging from 1.44–1.56 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two LiO4 tetrahedra and corners with two equivalent BO4 tetrahedra. There is two shorter (1.44 Å) and two longer (1.54 Å) S–O bond length. In the third S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two LiO4 tetrahedra and corners with two equivalent BO4 tetrahedra. There are a spread of S–O bond distances ranging from 1.44–1.55 Å. In the fourth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with two BO4 tetrahedra. There is two shorter (1.44 Å) and two longer (1.55 Å) S–O bond length. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Li1+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one Li1+ and one S6+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one S6+ atom. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one S6+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one S6+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one S6+ atom. In the fourteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the fifteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the sixteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiB by Materials Project

LiB crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Li is bonded to six equivalent B atoms to form a mixture of distorted edge, corner, and face-sharing LiB6 octahedra. The corner-sharing octahedral tilt angles are 60°. There are two shorter (2.21 Å) and four longer (2.53 Å) Li–B bond lengths. B is bonded in a 8-coordinate geometry to six equivalent Li and two equivalent B atoms. Both B–B bond lengths are 1.57 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Photon counting with intensified charge coupled device (ICCD) – II. Laser induced breakdown spectroscopy (LIBS) spectral measurement

This study explores the application of photon counting (PC) to enhance the resolution of spectra acquired by an intensified charge-coupled device (ICCD) detector, with a focus on analytical atomic emission spectrometry using laser-induced breakdown spectroscopy (LIBS) as a use-case example. It demonstrates that, for spectra obtained with the same spectrometer–ICCD system, PC provides higher spectral resolution compared to conventional analog detector readout. This enhancement is particularly evident in the line wings of spectral peaks, facilitating better discrimination of isotopic peaks in the measured spectra. Although PC does not improve the resolution of an optical spectrometer directly, it rectifies the resolution lost caused by signal spreading in conventional ICCD analog measurement. However, similar to other counting techniques, excessive photons compromise detector linearity due to signal pileup. A correction model is proposed to mitigate the pileup effect, resulting in improved linearity and dynamic range in PC measurements. Additionally, the study reveals unexpected periodic structures in the flatfield image of the ICCD, which cause non-uniform detector gain in conventional analog as well as PC measurement modes and must be addressed for high-precision measurements.

47 OTHER INSTRUMENTATION↗
DOE OSTI2025

Implementation of stacked ensemble machine learning for the detection of surrogate plutonium contamination in soil via LIBS

Supervised machine learning methods have demonstrated increased utility for the quantification of lanthanide and actinide elements in atomic spectroscopy applications. This study implements laser-induced breakdown spectroscopy (LIBS) for the identification of plutonium surrogate material (CeO 2 ) in soil matrices by training supervised machine learning methods on the recorded spectral data. A bagged ensemble using Random Forest yields the highest sensitivity predictions with a detection limit of 0.015 wt.% CeO 2 . However, high precision in Ce content prediction required the use of a stacked ensemble regression, which provided the superlative Ce quantification model with an error of 0.107% and a detection limit of 0.022 wt.%. Furthermore, the high performance of the stacked ensemble demonstrates its potential to enhance the accuracy and sensitivity of nuclear contaminant detection using field-deployable spectroscopic analyzers in real-world scenarios.

47 OTHER INSTRUMENTATION↗
DOE OSTI2023

Scale-up Production of Graphene Monoxide for Next-Generation LIB Anodes (AMMTO Final Report)

COnovate, LLC has developed a patented material called graphene monoxide and demonstrated that its unique chemical and crystal structure enables lithium-ion batteries (LIB) with greater specific capacity, safer and faster charging, and better low temperature performance than the industry standard. The current capability gap with COnovate’s technology is to scale up this new active anode material, developing processing technology to commercially relevant levels. This project will develop the means for progressive scale-up to 100g, 1kg, and 10kg levels, incorporating industrial synthesis and processing technologies, and deliver an industrial procedure/batch record draft for use by potential full-scale manufacturers to develop metric-ton production levels. The project goals of 10kg production and industrial procedure for full-scale production are necessary for COnovate’s customers to adequately evaluate and adopt their technology, and to pursue purchase orders for tons of material. MERF will confirm material analytics and performance in half cell tests during scaling and deliver materials to COnovate for QA/QC testing during the iterative scale up efforts. The final product batches will be delivered to COnovate for battery assembly and lifetime testing.

25 ENERGY STORAGE↗
DOE OSTI2024

High power actively Q-switched downhole LIBS analysis systems

An actively Q-switched laser induced breakdown spectroscopy (LIBS) probe, utilizing an optical fiber, a pump beam transmitted through the optical fiber, a coupler, and a lens for collimating the pump beam. The actively Q-switched laser, coupled to a sensor which provides information to a computer that controls a high voltage pulser providing a pulse to a Pockels cell located within the laser which can selectively cause the laser to pulse, resulting in high energy pulses and a second lens for focusing the output pulse such that it creates a plasma or spark. The light from the spark is captured and directed back through an optical system to remote equipment for elemental and/or molecular analysis.

McIntyre, Dustin Langdon↗
DOE OSTI2024

Spectral Data Fusion From Handheld Laser-Induced Breakdown Spectroscopy (LIBS) and X-ray Fluorescence (XRF) Analyzers for Improved Detection of Cerium in a Simulated Dispersal Accident

Here, this work implements a mid-level data fusion methodology on spectral data from handheld X-ray fluorescence and laser-induced breakdown spectroscopy analyzers to quantify plutonium surrogate (CeO 2 ) contamination in soil samples for the first time. Spectral data from each analyzer were used independently to train supervised machine learning regressions to predict Ce concentration. Fused features from both data sets were then used to train the same models, comparing prediction performance by evaluating model precision and sensitivity. Fusing principal component scores from the two sensors yielded an order of magnitude improvement in precision and sensitivity of predictions made with an artificial neural network, compared to predictions made by models trained on independent sensor data. As a result, a boosted ensemble trained on the fused spectral features yielded an ideal predictor with root-mean-squared error on the order of 10 –6 and calculated limit of detection order 10 –5 wt %.

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
DOE OSTI2020

Materials Data on LiB(CN)4 by Materials Project

LiBC4N4 is Tetraauricupride structured and crystallizes in the cubic P-43m space group. The structure is zero-dimensional and consists of one boron, metallic molecule and one Li(CN)4 cluster. In the Li(CN)4 cluster, Li1+ is bonded in a tetrahedral geometry to four equivalent N3- atoms. All Li–N bond lengths are 2.06 Å. C2+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.16 Å. N3- is bonded in a linear geometry to one Li1+ and one C2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiB(H3N)4 by Materials Project

Li(NH2)4BH4 crystallizes in the orthorhombic Pca2_1 space group. The structure is zero-dimensional and consists of four BH4 clusters and four Li(NH2)4 clusters. In each BH4 cluster, B3+ is bonded in a tetrahedral geometry to four H+0.67+ atoms. There is two shorter (1.23 Å) and two longer (1.24 Å) B–H bond length. There are four inequivalent H+0.67+ sites. In the first H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one B3+ atom. In the second H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one B3+ atom. In the third H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one B3+ atom. In the fourth H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one B3+ atom. In each Li(NH2)4 cluster, Li1+ is bonded in a distorted tetrahedral geometry to four N3- atoms. There are a spread of Li–N bond distances ranging from 2.06–2.14 Å. There are four inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted water-like geometry to one Li1+ and two H+0.67+ atoms. There is one shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. In the second N3- site, N3- is bonded in a distorted water-like geometry to one Li1+ and two H+0.67+ atoms. Both N–H bond lengths are 1.03 Å. In the third N3- site, N3- is bonded in a distorted water-like geometry to one Li1+ and two H+0.67+ atoms. Both N–H bond lengths are 1.03 Å. In the fourth N3- site, N3- is bonded in a distorted water-like geometry to one Li1+ and two H+0.67+ atoms. Both N–H bond lengths are 1.03 Å. There are eight inequivalent H+0.67+ sites. In the first H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom. In the second H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom. In the third H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom. In the fourth H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom. In the fifth H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom. In the sixth H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom. In the seventh H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom. In the eighth H+0.67+ site, H+0.67+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Comparison of machine learning techniques to optimize the analysis of plutonium surrogate material via a portable LIBS device

The utilization of machine learning techniques has become commonplace in the analysis of optical emission spectra. These methods are often limited to variants of principal components analysis (PCA), partial-least squares (PLS), and artificial neural networks (ANNs). A plethora of other techniques exist and are well established in the world of data science, yet are seldom investigated for their use in spectroscopic problems. In this study, machine learning techniques were used to analyze optical emission spectra of laser-induced plasma from ceria pellets doped with silicon in order to predict silicon content. Additionally, a boosted regression ensemble model was created, and its predictive accuracy was compared to that of traditional PCA, PLS, and ANN regression models. Boosted regression tree ensembles yielded fits with R-squared (R2) values as high as 0.964 and mean-squared errors of prediction (MSEPs) as low as 0.074, providing the most accurate predictive model. Neural networks performed with slightly lower R2 values and higher MSEPs compared to the ensemble methods, thus indicating susceptibility to overfitting.

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

NGFC-Lib/NGFC-Lib

Automated NGFC system design tool set to develop optimized, next-generation solid oxide fuel cell (SOFC) based natural gas fuel cell (NGFC) system designs with >70% fuel efficiency and <30 g/kWh CO2 emissions

Bao, Jie↗
DOE OSTI2024

LIB Design Module for Grid Energy System Application

We will employ a machine learning approach with intelligent data mining and database construction to analyze enormous data repositories for identifying and extracting geographic-dependent cell design specifications from publicly accessible grid-scale energy storage usage databases in an automated way at scale.

Liu, Dianying [Pacific Northwest National Laborato↗
DOE OSTI2026

covariance libs

This dataset contains covariance libraries created for SCALE. These will be distributed by providing documentation and metadata in GitLab repos hosted by ORNL (code.ornl.gov/scale/data/cov-libs), and the main datasets are hosted in S3-based ORNL servers. The data are also contained in Constellation. More documentation can be found in PUB ID 263037.

Brown, Jesse [ORNL] (ORCID:0000000207694100)↗