Multifunctional Disordered Sulfur-Doped Carbon for Efficient Sodium-Ion-Exchange and 2-Electron-Transfer-Dominant Oxygen Reduction Reaction. (September 2021)

• Record Type: Journal Article
• Authors: Kim, Hanvin; Yang, Hyeonsu; Kang, Jun; Takeuchi, Nozomi
• Is Part Of: Carbon. Volume 182(2021)
• Page Start: 242
• Page End: 253
• Publication Date: 2021-09
• Subjects: Multifunctional disordered sulfur-doped carbon -- Sodium-ion-exchange -- Reaction kinetics -- Sodium-ion-exchange performance -- Oxygen reduction reaction; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2021.05.063
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Multifunctional disordered sulfur-doped carbon catalyst is demonstrated for use in both sodium-ion-exchange and the 2-electron-transfer-dominant oxygen reduction reaction (ORR) for energy storage and conversion applications. The disordered sulfur-doped carbon prepared via a simple plasma-in-liquid approach showed distinct performance for each electrochemical application, and the underlying fundamental mechanisms were experimentally demonstrated. Benefiting from the enhanced reaction kinetics derived from C–S covalent bonds, superior sodium-ion-exchange performance with a high reversible capacity of ∼150 mA h g −1 over 5000 cycles is achieved with a stable rate capability. In addition, an efficient 2-electron-transfer-dominant ORR with a high current density of ∼25.66 mA cm −2 at a low overpotential of ∼0.890 V (vs. RHE) is obtained. This work cautiously proposes the importance of sulfur bonded to carbon to boost its electrochemical performance and is expected to provide new perspectives for various interdisciplinary applications. Graphical abstract: Image 1