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A novel compressive Phlogopite mica seal was developed that showed superior thermal cycle stability with very low leak rates at 800 °C. A commercially available Phlogopite mica paper was infiltrated with a wetting or melt-forming agent, and tested in a hybrid form during thermal cycling. The...
Data are presented to show the transient response of a proton exchange membrane fuel cell (PEMFC) subjected to change in the load. Overshoot and undershoot behaviors of the steady-state current density were observed for various rates of change in the voltage during constant inlet flow rate...
Hexamethylphosphoramide (HMPA) was investigated as a flame retarding additive for lithium-ion batteries. The flammability, electrochemical stability, conductivity, and cycling performance of electrolytes containing HMPA were studied. The addition of HMPA to electrolytes comprising solutions of...
The electrocatalytic activity and stability of alkaline air electrodes have been studied. The results show that the stability of the electrodes is determined by a large number of factors. To obtain high reaction rates electrocatalyst with high exchange currents and high surface area is critical....
Current density and potential distribution measurements were conducted using a segmented current collector and flow field setup on membrane electrode assemblies prepared with segmented and unsegmented electrodes made from two different types of commercially available gas diffusion layers. Both...
A high-voltage (5 V) LiCo 0.8 Fe 0.2 MnO 4 electrode with spinel-type structure has been prepared. 57 Fe Mössbauer spectra reveal high-spin Fe 3+ ions in octahedral coordination in the pristine sample, which are oxidized to tetravalent iron ions. Surface treatments with zinc and magnesium have...
A composite of mesoporous silica (SBA-15) with a polyethylene oxide (PEO) polymer electrolyte is examined for use in various electrochemical devices. Incorporation of SBA-15 in a PEO:LiClO 4 polymer electrolyte facilitates salt dissociation, enhances ion conductivity, and improves miscibility...
A new class of materials based on La x Sr 1− x VO 3− δ (LSV) has been studied as the anode for solid oxide fuel cells (SOFCs) operating on H 2 S-containing fuels. The LSV-based anodes are chemically and electrochemically stable under SOFC operating conditions. Furthermore, they appear to be...
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