Jeong Seok Yeon (Prof. Ho Seok Park’s group) in School of Advanced Materials Science & Engineering, Sungkyunkwan Univers
- 공과대학
- Hit4089
- 2021-07-05
Jeong Seok Yeon (Prof. Ho Seok Park’s group) in School of Advanced Materials Science & Engineering, Sungkyunkwan University (SKKU) reports a radially oriented open-porous structure and overall microspherical morphology of the as-designed host material, a uniform distribution and high loading of rod-like nano sulfur (nS), and a proper composition and strong bonding of host and nS. Thus, we could greatly improve the rate and cyclic capabilities of Li-S battery cathodes by optimizing redox kinetics of multi-electron conversion reaction.
Journal: ACS Nano, 2016, (5), 5163-5171
Contents: Hierarchical complex architectures of 2D conductive nanomaterials such as graphene and MXene, precisely controlling internal open porosity and orientation, external morphology, composition, and interaction are expected to provide promising hosts for high-capacity active materials. Moreover, the assembly of 2D nanomaterials into a specific direction leads to the achievement of unexpected transport properties exceeding the limitation of conventional randomly assembled ones. Thus, we first demonstrate the combined chemistry of a spray-frozen assembly and ozonation for the design of surface-modified rod-like nanosulfur (nS) immobilized onto radially oriented open-porous microspherical reduced graphene oxide (rGO) architectures. Our concept is featured with a radially oriented open-porous structure and overall microspherical morphology of the as-designed host material, a uniform distribution and high loading of rod-like nS, and a proper composition and strong bonding of host and nS. Thus, we could greatly improve the rate and cyclic capabilities of Li-S battery cathodes by optimizing redox kinetics of multi-electron conversion reaction.
DOI:https://doi.org/10.1021/acsnano.8b08822
Jeong Seok Yeon is a unified master's and doctor's course student under the supervision of Prof. Ho Seok Park in School of Advanced Materials Science & Engineering, Sungkyunkwan University (SKKU). His main research interests include the advanced energy storage materials and devices, including nanocarbon materials, modified polyoxometalate, advanced Li-ion batteries, Li-S batteries, Zn-ion batteries.
Chronoamperometry data of photo-assisted electrochemical oxidation process, open-circuit potential (OCP) enhanced by stacked structure.