Dr Han’s research focuses on developing low-dimensional functional materials, including carbon nanotubes, graphene and metal oxide nanostructures, to tackle the challenges in materials, energy and environmental science. He is an expert in vertical graphene, a special form of graphene that grows perpendicularly to the substrate. Vertical graphene can prevent the “re-stacking” issue of graphene layers, thereby enabling fast ion transport and large surface accessibility in energy storage devices. Together with colleagues and collaborators, he demonstrated that vertical graphene can be integrated into batteries and supercapacitors to offer highly-effective and reliable charge storage for renewable energy, hybrid electric vehicles and many other applications. More recently, his research is extended to vertical graphene supported catalysts for hydrogen energy (a CAS-CSIRO Joint Project 2019-2022) and CO2 reduction.