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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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Cost minimization of generation, storage, and new loads, comparing costs with and without externalities
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Uranium fate in wetland mesocosms: Effects of plants at two iron loadings with different pH values
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In-situ imaging of advanced materials subjected to in-plane biaxial loading using X-ray micro-computed tomography
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In-situ investigations of structural changes during cyclic loading of aluminium by high resolution reciprocal space mapping
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Deformation behavior of bulk metallic glasses under a mixed-mode (I/II) loading condition
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Identifying properties of low-loaded CoO[subscript X]/CeO[subscript 2] via X-ray absorption spectroscopy for NO reduction by CO
Abstract not provided
Stress and deformation heterogeneity in individual grains within polycrystals subjected to fully reversed cyclic loading
Abstract not provided
Thermal diffusion of mixed valence Ce in 6Li loaded silicate glass for neutron imaging
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Strength of SiCf-SiCm composite tube under uniaxial and multiaxial loading
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Rechargeability and economic aspects of alkaline zinc-manganese dioxide cells for electrical storage and load leveling
Batteries based on manganese dioxide (MnO2) cathodes are good candidates for grid-scale electrical energy storage, as MnO2 is low-cost, relatively energy dense, safe, water-compatible, and non-toxic. Alkaline Zn-MnO2 cells, if cycled at reduced depth of discharge (DOD), have been found to achieve substantial cycle life with battery costs projected to be in the range of $100 to 150 per kWh (delivered). Commercialization of rechargeable Zn-MnO2 batteries has in the past been hampered due to poor cycle life. In view of this, the work reported here focuses on the long-term rechargeability of prismatic MnO2 cathodes at reduced DOD when exposed to the effects of Zn anodes and with no additives or specialty materials. Over 3000 cycles is shown to be obtainable at 10% DOD with energy efficiency >80%. The causes of capacity fade during long-term cycling are also investigated and appear to be mainly due to the formation of irreversible manganese oxides in the cathode. Analysis of the data indicates that capacity loss is rapid in the first 250 cycles, followed by a regime of stability that can last for thousands of cycles. A model has been developed that captures the behavior of the cells investigated using measured state of charge (SOC) data as input. An approximate economic analysis is also presented to evaluate the economic viability of Zn-MnO2 batteries based on the experiments reported here. (C) 2014 Elsevier B.V. All rights reserved.
Numerical study of damage in particulate composites during high-strain rate loading using novel damage model
Not provided.