Concise, Single‐Step Synthesis of Sulfur‐Enriched Graphene: Immobilization of Molecular Clusters and Battery Applications. Issue 20 (18th March 2020)

• Record Type: Journal Article
• Authors: Omachi, Haruka; Inoue, Tsukasa; Hatao, Shuya; Shinohara, Hisanori; Criado, Alejandro; Yoshikawa, Hirofumi; Syrgiannis, Zois; Prato, Maurizio
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 20(2020)
• Page Start: 7836
• Page End: 7841
• Publication Date: 2020-03-18
• Subjects: cluster compounds -- graphene -- polyoxometalates -- sulfur -- surface chemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201913578
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The concise synthesis of sulfur‐enriched graphene for battery applications is reported. The direct treatment of graphene oxide (GO) with the commercially available Lawesson's reagent produced sulfur‐enriched‐reduced GO (S‐rGO). Various techniques, such as X‐ray photoelectron spectroscopy (XPS), confirmed the occurrence of both sulfur functionalization and GO reduction. Also fabricated was a nanohybrid material by using S‐rGO with polyoxometalate (POM) as a cathode‐active material for a rechargeable battery. Transmission electron microscopy (TEM) revealed that POM clusters were individually immobilized on the S‐rGO surface. This battery, based on a POM/S‐rGO complex, exhibited greater cycling stability for the charge‐discharge process than a battery with nanohybrid materials positioned between the POM and nonenriched rGO. These results demonstrate that the use of sulfur‐containing groups on a graphene surface can be extended to applications such as the catalysis of electrochemical reactions and electrodes in other battery systems. Abstract : The concise synthesis of sulfur‐enriched‐reduced graphene oxide (S‐rGO), based on Lawesson's reagent, was achieved. Polyoxometalate (POM) clusters were individually immobilized on the S‐rGO surface, and a lithium battery based on the POM and S‐rGO complex exhibited high cycling stability for the charge‐discharge process.