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Concise, Single‐Step Synthesis of Sulfur‐Enriched Graphene: Immobilization of Molecular Clusters and Battery Applications
Author(s) -
Omachi Haruka,
Inoue Tsukasa,
Hatao Shuya,
Shinohara Hisanori,
Criado Alejandro,
Yoshikawa Hirofumi,
Syrgiannis Zois,
Prato Maurizio
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201913578
Subject(s) - graphene , battery (electricity) , x ray photoelectron spectroscopy , sulfur , materials science , oxide , electrochemistry , reagent , surface modification , polyoxometalate , cathode , nanotechnology , chemical engineering , lithium–sulfur battery , catalysis , electrode , inorganic chemistry , chemistry , organic chemistry , power (physics) , physics , quantum mechanics , engineering , metallurgy
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.