Omachi Haruka, Inoue Tsukasa, Hatao Shuya, Shinohara Hisanori, Criado Alejandro, Yoshikawa Hirofumi, Syrgiannis Zois, Prato Maurizio
Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.
Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.
Angew Chem Int Ed Engl. 2020 May 11;59(20):7836-7841. doi: 10.1002/anie.201913578. Epub 2020 Mar 18.
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.
报道了用于电池应用的富硫石墨烯的简洁合成方法。用市售的劳森试剂直接处理氧化石墨烯（GO）制得富硫还原氧化石墨烯（S-rGO）。诸如X射线光电子能谱（XPS）等各种技术证实了硫官能化和GO还原的发生。还通过使用S-rGO与多金属氧酸盐（POM）作为可充电电池的阴极活性材料制备了一种纳米杂化材料。透射电子显微镜（TEM）显示POM簇分别固定在S-rGO表面。这种基于POM/S-rGO复合物的电池在充放电过程中比具有位于POM和未富集rGO之间的纳米杂化材料的电池表现出更高的循环稳定性。这些结果表明，石墨烯表面含硫基团的使用可扩展到诸如电化学反应催化和其他电池系统中的电极等应用。
