Concise,Single-Step Synthesis of Sulfur-Enriched Graphene: Immobilization of Molecular Clusters and Battery Applications |
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| Authors: | Prof. Dr. Haruka Omachi Tsukasa Inoue Shuya Hatao Prof. Dr. Hisanori Shinohara Dr. Alejandro Criado Prof. Dr. Hirofumi Yoshikawa Dr. Zois Syrgiannis Prof. Dr. Maurizio Prato |
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| Affiliation: | 1. Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602 Japan;2. Department of Nanotechnology for Sustainable Energy, School of Science and Technology, Kwansei Gakuin University, Sanda, 669-1337 Japan;3. Carbon Bionanotechnology Group, CICbiomaGUNE, P° Miramón 182, 20014 Guipúzcoa, Spain;4. Center of Excellence for Nanostructured Materials (CENMAT), INSTM, Dipartimento di Scienze Chimiche e Farmanceutiche, Università di Trieste, Piazzale Europa, 1, 34127 Trieste, Italy |
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| 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. |
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| Keywords: | Clusterverbindungen Graphen Polyoxometallate Schwefel Oberflächenchemie |
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