Jiuhui Han 교수

Chemically doped graphene with three-dimensional bicontinuous nanoporosity is developed for rechargeable Li-O2 batteries. N and S doping, together with a large accessible surface area and open pore channels of the nanoporous graphene significantly enhance the cathodic reaction kinetics of Li-O2 batteries for an ultrahigh rechargeable capacity of 10 400 mAh g−1 and a long cycling lifetime. As a service to our authors and readers, this journal provides supporting information supplied by the author

Constructing bulk graphene materials with well-reserved 2D properties is essential for device and engineering applications of atomically thick graphene. In this article, the recent progress in the fabrications and applications of sterically continuous porous graphene with designable microstructures, chemistries, and properties for energy storage and conversion are reviewed. Both template-based and template-free methods have been developed to synthesize the 3D continuously porous graphene, which

Intermetallic compounds formed from non-precious transition metals are promising cost-effective and robust catalysts for electrochemical hydrogen production. However, the development of monolithic nanoporous intermetallics, with ample active sites and sufficient electrocatalytic activity, remains a challenge. Here we report the fabrication of nanoporous Co₇Mo₆ and Fe₇Mo₆ intermetallic compounds via liquid metal dealloying. Along with the development of

Nitrogen-doped graphene exhibits high electrocatalytic activity toward the oxygen reduction reaction (ORR), which is essential for many renewable energy technologies. To maximize the catalytic efficiency, it is desirable to have both a high concentration of robust nitrogen dopants and a large accessible surface of the graphene electrodes for rapid access of oxygen to the active sites. Here, 3D bicontinuous nitrogen-doped mesoporous graphene synthesized by a low-temperature carbide-mediated graph

<b>Microscale supercapapcitors</b> based on hierarchical nanoporous hybrid electrodes consisting of 3D bicontinuous nanoporous gold and pseudocapacitive manganese oxide deliver an excellent stack capacitance of 99.1 F cm^-3 and a high energy density of 12.7 mW h cm^-3 with a retained high power density of 46.6 W cm^-3.

The fundamental understanding of sodium storage mechanisms in amorphous carbon is essential to develop high-performance anode materials for sodium-ion batteries. However, the intrinsic relation between the structure of amorphous carbon and Na⁺ storage remains to be debated due to the difficulty in controlling and characterizing the local atomic configurations of amorphous carbon. Here we report quantitative measurements of Na⁺ storage in a low-temperature dealloyed hard car

A full-performance rechargeable Li-O2 battery is developed by utilizing a nanoporous graphene cathode integrating with a compatible redox additive in a dimethyl sulfoxide based electrolyte. This battery system promotes the solution phase growth of Li2O2 for a large capacity and efficient decomposition of Li2O2 at a low charge potential, shining lights on practical implementations of Li-O2 batteries for high energy applications. As a service to our authors and readers, this journal provides suppo

Abstract Nickel has risen as a viable and cost‐effective substitute to noble metal catalysts in electrochemical hydrogen production, yet developing air‐stable and highly efficient nanostructured nickel‐based catalysts remains a significant challenge. Here a facile method for creating nanoporous Ni/NiO heterostructure catalysts for electrocatalytic hydrogen production is reported. The protocol employs chemical dealloying to establish a 3D bicontinuous nanoporous structure, followed by a controlle