Lee Yeon-Ju, Ha Tae-Hyun, Cho Gyu-Bong, Kim Ki-Won, Ahn Jou-Hyeon, Cho Kwon-Koo
Department of Materials Engineering and Convergence Technology and Research Institute for Green Energy Convergence Technology Gyeongsang National University 501, Jinju-daero, Jinju-si, Gyeongsangnam-do 52828, Republic of Korea.
Department of Chemical Engineering & Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 501, Jinju-daero, Jinju-si, Gyeongsangnam-do 52828, Republic of Korea.
J Nanosci Nanotechnol. 2020 Nov 1;20(11):6782-6787. doi: 10.1166/jnn.2020.18783.
In this study, NiS/graphene nanocomposites were synthesized by simple heat treatment method of three graphene materials (graphene oxide (GO), reduced graphene oxide (rGO) and nitrogen-doped graphene oxide (N-rGO)) and NiS precursor. The morphology and crystal structure of NiS/graphene nanocomposites were characterized using field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. Electrochemical properties were also investigated. NiS/graphene nanocomposites homogeneously wrapped by graphene materials have been successfully manufactured. Among the three nanocomposites, NiS/N-rGO nanocomposite exhibited the highest initial and retention capacity in discharge, respectively, of 1240 mAh/g and 467 mAh/g up to 100 cycles at 0.5 C.
在本研究中，通过三种石墨烯材料（氧化石墨烯（GO）、还原氧化石墨烯（rGO）和氮掺杂氧化石墨烯（N-rGO））与硫化镍前驱体的简单热处理方法合成了硫化镍/石墨烯纳米复合材料。使用场发射扫描电子显微镜（FE-SEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）和拉曼光谱对硫化镍/石墨烯纳米复合材料的形态和晶体结构进行了表征。还研究了其电化学性能。已成功制备出被石墨烯材料均匀包裹的硫化镍/石墨烯纳米复合材料。在这三种纳米复合材料中，硫化镍/N-rGO纳米复合材料在0.5 C下100次循环时的放电初始容量和保持容量最高，分别为1240 mAh/g和467 mAh/g。
