Conventional surface acoustic wave - electrostatic deposition (SAW-ED) technology is struggling to compete with other thin film fabrication technologies because of its limitation in atomizing high density solutions or solutions with strong inter-particle bonding that requires very high frequency (100 MHz) and power. In this study, a hybrid surface acoustic wave - electrohydrodynamic atomization (SAW-EHDA) system has been introduced to overcome this problem by integrating EHDA with SAW to achieve the deposition of different types of conductive inks at lower frequency (19.8 MHZ) and power. Three materials, Poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV), Zinc Oxide (ZnO), and Poly(3, 4-ethylenedioxythiophene):Polystyrene Sulfonate (PEDOT:PSS) have been successfully deposited as thin films through the hybrid SAW-EHDA. The films showed good morphological, chemical, electrical, and optical characteristics. To further evaluate the characteristics of deposited films, a humidity sensor was fabricated with active layer of PEDOT:PSS deposited using the SAW-EHDA system. The response of sensor was outstanding and much better when compared to similar sensors fabricated using other manufacturing techniques. The results of the device and the films’ characteristics suggest that the hybrid SAW-EHDA technology has high potential to efficiently produce wide variety of thin films and thus predict its promising future in certain areas of printed electronics.
The initial capacity and cycle retention properties of all-solid lithium batteries (ASLBs) were greatly improved by utilizing polyethylene oxide (PEO)/lithium salts in conjunction with LiFSi, and coating the nickel manganese cobalt oxide (NCM) cathode component with lithium manganese oxide (LMO). That is, composite cathodes for ASLBs were fabricated by using lithium salts (LiClO4/LiFSi (8:2)) with PEO, Al-LLZO powder, Super-P, and LMO-coated NCM-424/622, respectively (Al-LLZO = Li6.25Al0.25La3Zr2O12). LiFSi was added to a solution of PEO/LiClO4 ([EO]:[Li] = 13:1) to generate a composite cathode and composite solid electrolyte (CSE) sheet. The initial capacity and cycle retention of the resulting cells were improved by controlling the side reactions and the improving kinetic characteristics. Moreover, NCM-424 and NCM-622 were coated with LMO; the optimum LMO coating amount (1 wt%) and NCM-424/622 ratio (9:1) for simultaneously improving the capacity and cycle retention were explored. Overall, the initial capacity of the ASLBs reached 152 mAh g−1, with a capacity retention rate of 92% at the 100th cycle.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.