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Binder-free Co-Mn composite oxide was successfully deposited at low temperature on a woven substrate through a combination of electroless and electrolytic steps. The principle of the approach was illustrated with cobalt metal and a successful thin film metal oxide formation was supported by CV, XRD and XPS data. The viability of the binder-free Co-Mn oxide electrode was tested as a Li-air battery electrocatalyst and yielded an initial specific capacity of up to 2000 mA h g À1 and survived multiple charge-dischargerecharge cycles. The oxidation time in the electrolytic oxidation-step was found to affect the battery discharge period. In comparison to the conventional polymeric binder methods, the present binder-free method is potentially adaptable to a roll-roll continuous processing approach. Experimental Materials preparationThe thin lm Co-Mn composite oxide catalyst was prepared on a exible woven carbon substrate (Fuel Cell Earth, AvCarbele, 11 ohm cm electrical resistivity, 99.5% carbon content) which is rst

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A procedure is described for making self absorption corrections for x-ray fluorescence analysis of ambient air aerosols which are collected in two size ranges with a dichotomous sampler. Calculations for fine particles are based on the assumption of a uniform layer of accumulated deposit which has an exponentially decreasing depth profile within a membrane filter. Coarse particles are treated as spheres with a log normal mass distribution which is subject to modification by the sampling device. An average attenuation and the associated uncertainty is deduced for coarse particles by considering a wide variety of possible chemical compositions.