SEARCH · Engineering Papers
Results for “graphite”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Anode Overpotential Control via Interfacial Modification: Inhibition of Lithium Plating on Graphite Anodes
Not Available
120 GeV neutrino physics graphite target damage assessment using electron microscopy and high-energy x-ray diffraction
Not Available
Roller Coaster in a Flatland: Magnetoresistivity in Eu-Intercalated Graphite
Not Available
Predicting High-Temperature Decomposition of Lithiated Graphite: Part I. Review of Phenomena and a Comprehensive Model
Not Available
Diffusivities of Ag, Cs, Sr, and Kr in TRISO fuel particles and graphite
Tri-structural isotropic (TRISO) coated particles have been developed and studied since the late 1950s when the concept of coated particles was invented by Roy Huddle of the United Kingdom Atomic Energy Authority. Several decades of work by half a dozen countries on fission product transport in TRISO fuel through numerous irradiation and heating experiments have led to several recommendations of transport data and to the adoption of various sets of diffusion coefficients. In 1997, the International Atomic Energy Agency (IAEA) gathered all these historical results and issued a technical document (TECDOC-978 [IAEA]) that summarizes these sets of recommended diffusion coefficients. Table 1 shows the reference literature articles for the diffusivities that have historically been recommended by the American and German TRISO fuel development programs and that are summarized in the IAEA report (see section 7 for full references of these articles).
Quantifying Lithium Ion Exchange in Solid Electrolyte Interphase (SEI) on Graphite Anode Surfaces
Solid Electrolyte Interphase (SEI) has been identified as the most important and least understood component in lithium-ion batteries. Despite extensive studies in the past two decades, a few mysteries remain: what is the chemical form of and degree of mobility of Li + in the interphase? What fraction of Li + is permanently immobilized in the SEI, while the rest are still able to participate in the cell reactions via the ion-exchange process with Li + in the electrolyte? This study attempted to answer, in part, these questions by using 6 Li and 7 Li-isotopes to label SEIs and electrolytes, and then quantifying the distribution of permanently immobilized and ion-exchangeable Li + with solid-state NMR and ToF-SIMS. The results showed that the majority of Li + were exchanged after one SEI formation cycle, and a complete exchange after 25 cycles. Ion exchange by diffusion based on concentration gradient in the absence of applied potential also occurred simultaneously. This knowledge will provide a foundation for not only understanding but also designing better SEIs for future battery chemistries.
Graphite oxidation at low temperature.
Reaction kinetics of solid carbon oxidation investigated at 420-530 degrees c
Nested Fullerenes on Graphite
A novel method of forming nested fullerenes by irradiation of carbon soot using the high energy beam in a 300-kV electron microscope.
Stress-rupture test program and life predictions for T-1000 graphite and polybenzoxazole fibers
Explore the source record for details and available documents.
The Role of Electrolyte Upon the SEI Formation Characteristics and Low Temperature Performance of Lithium-Ion Cells With Graphite Anodes
Quarternary lithium-ion battery electrolyte solutions containing ester co-solvents in mixtures of carbonates have been demonstrated to have high conductivity at low temperatures (<-20 degrees Celcius).
Irreversible Capacities of Graphite in Low Temperature Electrolytes for Lithium-Ion Batteries
Carbonaceous anode materials in lithium ion rechargeable cells experience irreversible capacity, mainly due to a consumption of lithium in the formation of surface passive films. The stability and kinetics of lithium intercalation into the carbon anodes are dictated by these films.
PREDICTIVE MODEL FOR CHRONIC OXIDATION OF NUCLEAR GRAPHITE UNDER NORMAL OPERATING CONDITIONS OF HIGH TEMPERATURE GAS-COOLED REACTORS
Explore the source record for details and available documents.
Assessment of elastic anisotropy in nuclear graphites using laser ultrasonic shear wave birefringence measurements
Explore the source record for details and available documents.
Graphite Irradiation Data Analysis
Future ASME Code Development and Reactor Deployment