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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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Structure and electrochemical properties of copper wires with seamless 1D nanostructures
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Robust computational framework for wire-mesh sensor potential field calculations
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Why wait? Let us start computing while the data is still on the wire
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Investigation of asymmetry of wire-array Z pinches at stagnation using a 4-channel laser diagnostic
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Experimental determination and analysis of the transverse pressure difference in a wire-wrapped rod bundle
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Synthesis of NiTi microtubes via the Kirkendall effect during interdiffusion of Ti-coated Ni wires
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Effect of Cr content on interdiffusion and Kirkendall pore formation during homogenization of pack-aluminized Ni and Ni-Cr wires
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Microstructure and porosity evolution during sintering of Ni-Mn-Ga wires printed from inks containing elemental powders
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Capillary forces as a limiting factor for sawing of ultrathin silicon wafers by diamond multi-wire saw
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Recrystallization behavior and mechanical properties of Haynes 282 fabricated by wire-arc additive manufacturing with post-heat treatment
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Synchrotron based investigation of anisotropy and microstructure of wire arc additive manufactured Grade 91 steel
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In-situ and in-operando analysis of voltage losses using sense wires for proton exchange membrane water electrolyzers
Proton exchange membrane water electrolyzer development requires understanding processes at the materials and interface levels to reach the required performance and lifetime targets for increasing market penetration. To achieve the required progress, it is critical to develop advanced in-situ diagnostics that allow observation of the changes that come with the reduction of catalyst loading combined with long-term intermittent operation. This work presents an internal voltage sensing method that enables observing internal voltage drops in an operating electrolyzer cell. It allows the total cell resistance to be separated into anode, CCM, and cathode resistance. The method is demonstrated by operating cells with different anode porous transport layers (PTLs). The changing properties of the PTLs result in significant variations of the resistances. Enhancing the PTL properties with a protective coating reduces the anode resistance significantly. In addition to these observations, the method enables a real-time monitoring of resistance related values that impact performance in water electrolyzers. Long-term experiments with the method allow us to gain insights into processes that occur during operation such as conditioning or degradation. The internal voltage sensing method presented in this study is a novel technique for diagnosing, analyzing, and optimizing water electrolyzers and other energy conversion devices.