CAJ | 학술논문

采用一步水热法制备石墨烯纳米片（GNS）/CoS2复合材料，利用XRD和SEM对所制备复合材料的微观结构进行表征，采用循环伏安法和交流阻抗法对复合材料的电化学性能进行研究。研究结果表明，在水热过程中，氧化石墨（GO）逐渐被还原成石墨烯纳米片（GNS），能够为 CoS2晶核的形成提供更多的接触点，有利于 CoS2颗粒均匀地生长在GNS表面。这种结构的复合材料既能够显著增加CoS2和电解液之间的有效接触面积，提高CoS2的电化学利用率，同时又能够改善材料的导电性，有利于提高材料的比电容。
채용일보수열법제비석묵희납미편（GNS）/CoS2복합재료，이용XRD화SEM대소제비복합재료적미관결구진행표정，채용순배복안법화교류조항법대복합재료적전화학성능진행연구。연구결과표명，재수열과정중，양화석묵（GO）축점피환원성석묵희납미편（GNS），능구위 CoS2정핵적형성제공경다적접촉점，유리우 CoS2과립균균지생장재GNS표면。저충결구적복합재료기능구현저증가CoS2화전해액지간적유효접촉면적，제고CoS2적전화학이용솔，동시우능구개선재료적도전성，유리우제고재료적비전용。
The graphene nanosheet(GNS)/CoS2 composite was prepared by the one-step hydrothermal method. The crystal structure and morphology were characterized by XRD and SEM. Electrochemical properties were determined by cyclic voltammetry and electrochemical impedance spectroscopy. Graphite oxide (GO) was gradually reduced to form graphene nanasheet during the hydrothermal process, which could provide abundant contact sites for the formation of CoS2 crystal nucleus, thus leading to uniform distribution of CoS2particles on the surface of graphene. Such novel structure composite not only significantly enhanced the effective contact area between CoS2 and electrolyte, but also improved electrochemical utilization of CoS2 electrode materials. Meanwhile, it facilitated electrical conductivity of the material, resulting in increased specific capacitance.