Related Experiment Video
Updated: Feb 6, 2026

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
Published on: July 3, 2025
Metal organic frameworks derived cobalt sulfide/reduced graphene oxide composites with fast reaction kinetic and
Jing Huang1, Xuekun Tang1, Zishun Li1
1School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
Abstract:
We report a metal-organic framework-derived Co9S8 nanoflakes on reduced graphene oxide sheet composites as an advanced sodium-ion battery anode. Using a galvanostatic intermittent titration technique, we reveal that the sodium diffusion coefficient of the composite is higher than that of its counterpart. Ex-situ scanning electron microscopy images suggest the excellent mechanical stability of Co9S8 nanoflakes on the reduced graphene oxide sheet electrode during cycling, thereby facilitating cyclic stability. The partial surface-induced capacitive effect also contributes to electrochemical performance. With the reduced graphene oxide, the Co9S8 nanoflakes on the reduced graphene oxide sheet electrode deliver a high discharge capacity of 551 mA h g-1 at 0.1 A g-1, a good rate capability at 10 A g-1, and an excellent cyclic stability up to 500 cycles. rGO/Co9S8 shows potential for practical applications in Na3V2(PO4)3‖rGO/Co9S8 full cells.
Related Concept Videos
Oxidation-Reduction Reactions
Preparation and Reactions of Sulfides
Alkali Metals
Table 1: Properties of the alkali metals
Structure and Nomenclature of Thiols and Sulfides
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Stability of structures

