MOUDI analysis of particle size distributions for ultrasonic spraying of salt solutions from an array of microscopic orifices

We report characterization of spray-based nanoporous particle synthesis for use in the cathode of lithiumion batteries. Ultrasonic Microarray Spray Tuning (uMIST) was used to create microdroplets of salt solutions and battery material precursors, and the size distributions of produced microdroplets were investigated with a MicroOrifice Uniform Deposit Impactor (MOUDI). Experimental challenges associated with spray orientation, flow control and consistency of operation were addressed, and a promising solution for continuous droplet collection to obtain a statistically relevant droplet size distribution was proposed. Improved analysis capabilities will lead to a better understanding of the uMIST droplet formation mechanism.