Scientific researchers from Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, and Peking University have made new progress in batch preparation of two-dimensional transition metal telluride materials, which makes it possible for large-scale preparation of two-dimensional transition metal telluride materials. The research findings were published online on April 3rd in Nature. Two dimensional transition metal telluride materials are a new type of two-dimensional materials, composed of tellurium atoms (Te) and transition metal atoms (such as molybdenum, tungsten, niobium, etc.). Their microstructure is similar to a "sandwich", where the transition metal atoms are "sandwiched" between the upper and lower layers of tellurium atoms, forming layered two-dimensional materials. Due to their unique physical and chemical properties such as superconductivity, magnetism, and catalytic activity, two-dimensional transition metal telluride materials have shown important application potential in fields such as quantum communication, catalysis, energy storage, and optics, and have received widespread attention from the international academic community. "For example, two-dimensional transition metal telluride has high conductivity and large specific surface area, which can be used as electrode materials for high-performance supercapacitors and batteries. At the same time, two-dimensional transition metal telluride nanosheets have rich adjustable active sites on the surface, which can be used as an electrocatalyst for preparing green hydrogen and dioxygenated water to improve the selectivity, efficiency and performance of the catalyst. In addition, the material also exhibits unique quantum phenomena, such as superconductivity and giant magnetoresistance, which can be used as materials for next-generation low-power devices and high-density magnetic storage devices." Wu Zhongshuai, co author of the paper and researcher of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, explained. However, currently the material is unable to achieve high-quality batch preparation, which hinders its practical application. Two dimensional transition metal telluride materials are generally prepared using a "top-down" method, similar to dismantling building blocks and peeling them layer by layer through mechanical or chemical forces to prepare single-layer two-dimensional nanosheets. The commonly used "top-down" methods include chemical intercalation peeling, ball milling, tape peeling, liquid-phase ultrasound, etc. Among them, although the chemical intercalation peeling has the highest peeling efficiency, it still takes several hours to peel. Scientists mostly use organic lithium reagents as intercalators, which insert intercalators containing lithium ions into the layers of bulk layered materials, and use the reaction between lithium and water to "expand" the intercalators, forming a "pressure column" between each layer to "spread" the stacked nanosheets layer by layer, just like using a "chemical scraper" to "scrape" the nanosheets layer by layer. The gas expansion force between these layers is much greater than the mechanical stripping force, which can improve the stripping efficiency. "However, organic lithium is a flammable and explosive liquid reagent with significant safety hazards. Therefore, achieving safe and efficient chemical stripping has become a goal of scientists' efforts," said Wu Zhongshuai. Researchers have innovatively used solid-phase chemical intercalation and stripping methods to screen out a solid-phase intercalation reagent - lithium borohydride. Lithium borohydride has strong reducing properties and is stable in dry air. It can be used for high-temperature solid-phase lithium insertion reactions, solving the problem of slow insertion reaction speed and achieving safe, efficient, and fast insertion and stripping. The entire intercalation and stripping process only takes 10 minutes and can produce hundreds of grams (108 grams) in bulk