（1. Northwest Institute for Nonferrous Metal Research, Xian 710016, China) (2. National Defense Technology Industry Nuclear Materials Technology Innovation Center, Beijing 102413, China)
Two dimensional transition metal dichalcogenides (TMDCs) are novel materials with a graphenelike layered structure. Due to ultrathin interlayer spacing, large specific surface area, abundant edge sites, good chemical stability, and adjustable band gap width, it has caused widespread concern among researchers in the fields of optoelectronic devices, photocatalysts, lithiumion batteries, supercapacitors, solid lubricants, etc. The basic structure of graphenelike TMDCs is introduced, and the commonly used preparation methods and applications are reviewed. Future development trends and challenges are also forecasted.