Abstract:Nano-micron materials play an important role in the field of new energy. Spray pyrolysis technology is regarded as a promising technique for the industrial-scale production of nano-micro powders, owing to its short process flow, continuous operation, low production cost, and pollution-free reaction. Additionally, spray pyrolysis technology offers advantages such as minimal powder agglomeration, uniform particle size distribution, high specific surface area, controllable chemical composition, and excellent particle flowability, which is widely used in the synthesis of composite materials. This article summarizes research achievements in the preparation of key materials via spray pyrolysis technology, including conductors and catalysts, multi-purpose materials, solar cell materials, lithium-ion battery materials, and fuel cell materials. It was found that most studies focus on exploring the influence of process parameters on the properties of target materials, while some studies focus on synthesizing composite materials with specific structures and optimizing their properties. Currently, achieving large-scale production of fine powders with particle sizes below 5μm is a major challenge for spray pyrolysis technology: powders produced by pneumatic atomization can be easily mass-produced but have larger particle sizes, limiting their industrial application scope; ultrasonic atomization can produce submicron powders (below 5μm) but is difficult to scale up. Based on literature research, future development efforts should focus on two aspects: first, in the technical research domain, there is an urgent need to deepen the understanding of the mechanisms of spray pyrolysis technology and its operational processes; second, in the field of engineering applications, equipment and atomization processes must be optimized and improved, such as enhancing atomization nozzles or incorporating methods to promote particle size reduction. Furthermore, it is essential to actively integrate spray pyrolysis technology with other material preparation techniques to further explore the advantages of combined technologies and improve material performance.
