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Results for “silicone materials”

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 163 records · Page 9
All sourcesNASA NTRSDOE OSTI
DOE OSTI2023

Methods for manufacturing electrochemical sensors, and related electrochemical sensors

Methods for manufacturing an electrochemical sensor include forming at least one electrode by printing at least one conductive ink on a surface of at least one substrate. The conductive ink may comprise, e.g., a platinum-group metal, another transition-group metal with a high-temperature melting point, a conductive ceramic material, glass-like carbon, or a combination thereof. The electrochemical sensor may be free of another material over the at least one electrode. An electrochemical sensor, formed according to such methods, may be configured for use in harsh environments (e.g., a molten salt environment). Electrodes of the electrochemical sensor comprise conductive material formed from a printed, conductive ink. In some embodiments, at least a portion of the electrochemical sensor is free of silver, gold, copper, silicon, and polymer materials, such portion being that which is to be exposed to the harsh environment during use of the electrochemical sensor.

Shaltry, Michael R.↗
DOE OSTI2021

Polymers in Lithium‐Ion and Lithium Metal Batteries

Abstract Lithium‐ion batteries play a significant role in modern electronics and electric vehicles. However, current Li‐ion battery chemistries are unable to satisfy the increasingly heightened expectations regarding energy demand and reliability. To boost the overall energy density while ensuring the safety of Li batteries, researchers have focused on alternative battery materials, such as silicon, sulfur, and Li metal. These represent promising avenues, although numerous obstacles (e.g., Si cracking, polysulfide shuttling, Li dendrites, etc.) must be tackled before batteries based on these materials can enter mass production and penetrate the mainstream market. Polymers are a class of materials that are widely used in current battery systems; however, many novel polymer chemistries may offer better performance and reliability than the current ones, and even overcome the issues of the above‐mentioned new battery materials. In this review, selected polymeric materials for solving these issues are categorized into four parts: polymer electrolytes, polymer artificial solid‐electrolyte interphases, binders, and separators. Both the current progress and the characterization methods are included. Potential future directions of energy materials research are pointed out as well.

Li, Junheng↗
DOE OSTI2020

Materials Data on GeF4 by Materials Project

GeF4 is Silicon tetrafluoride structured and crystallizes in the cubic I-43m space group. The structure is zero-dimensional and consists of two tetrafluorogermane molecules. Ge4+ is bonded in a tetrahedral geometry to four equivalent F1- atoms. All Ge–F bond lengths are 1.71 Å. F1- is bonded in a single-bond geometry to one Ge4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H4C by Materials Project

CH4 is Silicon tetrafluoride structured and crystallizes in the cubic I-43m space group. The structure is zero-dimensional and consists of two methane molecules. C4- is bonded in a tetrahedral geometry to four equivalent H1+ atoms. All C–H bond lengths are 1.10 Å. H1+ is bonded in a single-bond geometry to one C4- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CF4 by Materials Project

CF4 is Silicon tetrafluoride-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four carbon tetrafluoride molecules. C4+ is bonded in a tetrahedral geometry to four equivalent F1- atoms. All C–F bond lengths are 1.34 Å. F1- is bonded in a single-bond geometry to one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SiF4 by Materials Project

SiF4 is Silicon tetrafluoride structured and crystallizes in the cubic I-43m space group. The structure is zero-dimensional and consists of two silane, tetrafluoro- molecules. Si4+ is bonded in a tetrahedral geometry to four equivalent F1- atoms. All Si–F bond lengths are 1.58 Å. F1- is bonded in a single-bond geometry to one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SO4 by Materials Project

SO4 is Silicon tetrafluoride-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four sulfuric acid molecules. S is bonded in a tetrahedral geometry to four equivalent O atoms. All S–O bond lengths are 1.48 Å. O is bonded in a single-bond geometry to one S atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb4Bi by Materials Project

Rb4Bi is Silicon tetrafluoride-like structured and crystallizes in the cubic Fd-3m space group. The structure is zero-dimensional and consists of eight Rb4Bi clusters. Rb is bonded in a single-bond geometry to one Bi atom. The Rb–Bi bond length is 3.46 Å. Bi is bonded in a tetrahedral geometry to four equivalent Rb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfBr4 by Materials Project

HfBr4 is Silicon tetrafluoride-like structured and crystallizes in the cubic Pa-3 space group. The structure is zero-dimensional and consists of eight hafnium tetrabromide molecules. Hf4+ is bonded in a tetrahedral geometry to four equivalent Br1- atoms. All Hf–Br bond lengths are 2.46 Å. Br1- is bonded in a single-bond geometry to one Hf4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K4Bi by Materials Project

K4Bi is Silicon tetrafluoride-like structured and crystallizes in the cubic Fd-3m space group. The structure is zero-dimensional and consists of eight K4Bi clusters. K is bonded in a single-bond geometry to one Bi atom. The K–Bi bond length is 3.31 Å. Bi is bonded in a tetrahedral geometry to four equivalent K atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MnO4 by Materials Project

MnO4 is Silicon tetrafluoride-like structured and crystallizes in the tetragonal I4_1/amd space group. The structure is zero-dimensional and consists of four mangan(iv)-hydroxyd molecules. Mn is bonded in a tetrahedral geometry to four equivalent O atoms. All Mn–O bond lengths are 1.62 Å. O is bonded in a single-bond geometry to one Mn atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SO4 by Materials Project

SO4 is Silicon tetrafluoride-like structured and crystallizes in the cubic F-43m space group. The structure is zero-dimensional and consists of four sulfuric acid molecules. S is bonded in a tetrahedral geometry to four equivalent O atoms. All S–O bond lengths are 1.48 Å. O is bonded in a single-bond geometry to one S atom.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Mitigation of rapid capacity decay in silicon-LiNi 0.6 Mn 0.2 Co 0.2 O 2 full batteries

Silicon (Si)-based materials have been considered as the most promising anode materials for high-energy-density lithium-ion batteries because of their higher storage capacity and similar operating voltage, as compared to the commercial graphite (Gr) anode. But the use of Si anodes including silicon-graphite (Si-Gr) blended anodes often leads to rapid capacity decay in Si-Gr/LiNixMnyCo z O 2 (x+y+z=1) full cells, which has been attributed to surface instability of the Si component. In addition to stabilizing the surface, this work investigates the potential of the Si-Gr blended anodes in a full-cell configuration and its impact on the capacity contribution from active components. Using dQ/dV plots of the full cells, a powerful but simple-to-implement differential potential approach is developed to decouple the capacity contribution and degradation from the graphite and silicon components. Data collected from three-electrode cells confirm the results from the differential potential approach, which suggests a voltage slippage to a higher voltage at the blended anode side. Additionally, the voltage slippage causes a reduced utilization of the Gr component and exacerbates side reactions between the Si-Gr anode and carbonate electrolytes. Furthermore, based on these failure mechanisms, we adopted a mitigation strategy to tune the open circuit voltage of the prelithiated anode while stabilizing the surface. As a result, the full cells with the modified Si-Gr anodes (mass loading, 2.5 mAh/cm 2 ) offer a highly reversible full-cell energy density of 390 Wh/kg (based on the mass of both anode and cathode materials in a full cell) with a cycling CE of 99.9% over 200 cycles.

25 ENERGY STORAGE↗
DOE OSTI2020

Materials Data on AlBr4 by Materials Project

AlBr4 is Silicon tetrafluoride-like structured and crystallizes in the cubic Fm-3c space group. The structure is zero-dimensional and consists of twenty-four AlBr4 clusters. Al is bonded in a tetrahedral geometry to four equivalent Br atoms. All Al–Br bond lengths are 2.32 Å. Br is bonded in a single-bond geometry to one Al atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RuO4 by Materials Project

RuO4 is Silicon tetrafluoride-like structured and crystallizes in the cubic P-43n space group. The structure is zero-dimensional and consists of eight ruthenium(iv) hydroxide molecules. Ru is bonded in a tetrahedral geometry to four equivalent O atoms. All Ru–O bond lengths are 1.71 Å. O is bonded in a single-bond geometry to one Ru atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on InI4 by Materials Project

InI4 is Silicon tetrafluoride-like structured and crystallizes in the cubic Fm-3c space group. The structure is zero-dimensional and consists of twenty-four InI4 clusters. In is bonded in a tetrahedral geometry to four equivalent I atoms. All In–I bond lengths are 2.76 Å. I is bonded in a single-bond geometry to one In atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CaC4 by Materials Project

CaC4 is Silicon tetrafluoride-like structured and crystallizes in the cubic Pn-3m space group. The structure is zero-dimensional and consists of two CaC4 clusters. Ca2+ is bonded in a tetrahedral geometry to four equivalent C+0.50- atoms. All Ca–C bond lengths are 2.47 Å. C+0.50- is bonded in a single-bond geometry to one Ca2+ atom.

36 MATERIALS SCIENCE↗