His research focuses on carbon-related materials, particularly graphene. His work includes spectroscopic and theoretical studies of few-layer graphene and folded graphene, graphene intercalation, and graphene-based composites for energy harvesting, such as lithium-ion batteries and supercapacitors, as well as nanoelectronics. His team has developed several advanced graphene technologies, including a nanometer-level protective coating for lithium-ion battery electrodes using micro-gravure coating, mass production of graphene via a supercritical carbon dioxide system assisted by co-intercalation, and graphene-based electrodes for water treatment through electrolysis.