A linear ramp potential excitation was applied to a thin layer electrolysis cell containing a solution of several electroactive substances. The integral of the current response constitutes a coulometric titration of the electroactive species present. The technique, potential scan coulometry, has been evaluated by electrolysis of solutions of copper, lead, cadmium, and zinc ions in a 1M KNO, medium and precipitation of I-, Br-, and CI-ions with mercurous ion electrogenerated from a mercury-coated platinum electrode. The technique appears to be particularly suited to rapid analysis of mixtures and of very small amounts of electroactive substance.EVERAL
This work was funded by Naval Sea Systems Command (NAVSEA 63R-32) and constitutes a fraction of a program to establish a technology base for high discharge-rate Li/SOC12 batteries. We thank Mr. F. Romano (NAVSEA 63R-32) for his interest and support.
ABSTRACTInfrared, x-ray, and electron spin resonance spectroscopic studies of laboratory-synthesized Li2S204 are reported. Spectra of cathode samples from Li/SO2 cells discharged at -30 ~ 25 ~ and 70~ are compared with the spectra of the laboratory-prepared Li2S204. The principal discharge material is confirmed to be Li~S~O4. The 70~ discharge is shown to produce a different set of products from the discharges at the lower temperatures.* Electrochemical Society Active Member.
This paper describes a lifetime PSP system that has recently been developed using pulsed light-emitting diode (LED) lamps and a new interline transfer CCD camera technology. This system alleviates noise sources associated with lifetime PSP systems that use either flash-lamp or laser excitation sources and intensified CCD cameras for detection. Calibration curves have been acquired for a variety of PSP formulations using this system, and a validation test was recently completed in the Subsonic Aerodynamic Research Laboratory (SARL) at Wright-Patterson Air Force Base (WPAFB). In this test, global surface pressure distributions were recovered using both a standard intensity-based method and the new lifetime system. Results from the lifetime system agree both qualitatively and quantitatively with those measured using the intensity-based method. Finally, an advanced lifetime imaging technique capable of measuring temperature and pressure simultaneously is introduced and initial results are presented.
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