石墨烯/镍钴类水滑石的制备及电化学性能  

Preparation and Electrochemical Properties of Graphene/Nickel-Cobalt Hydrotalcite

作　　者：白瑞[1,2] 卢翠英 党睿[1] 王金玺 慕苗[1,2] 张瑾瑾[1] 马东涛[1] 弓莹 Bai Rui;Lu Cuiying;Dang Rui;Wang Jinxi;Mu Miao;Zhang Jinjin;Ma Dongtao;Gong Ying(School of Chemistry and Chemical Engineering,Yulin University,Yulin,Shaanxi 719000;Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization,Yulin University,Yulin,Shaanxi 719000)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]陕西省低变质煤洁净利用重点实验室,陕西榆林719000

出　　处：《非金属矿》2022年第5期23-25,29,共4页Non-Metallic Mines

基　　金：陕西省教育厅重点科学研究计划(重点实验室)(20JS162、21JS046、21JS043);国家自然科学基金(52062047、21763029);榆林市科技局项目(CXY-2020-006-06、CXY-2020-005-04、CXY-2019-82-2);榆林学院校内高层次人才项目(11GK45);榆林学院横向项目(2021HX286)。

摘　　要：采用改进Hummers法制备的氧化石墨烯(GO)为原料,利用水热法制备石墨烯/镍钴类水滑石复合材料(RGO/NiCoLDHs)。分别采用扫描电子显微镜(SEM)、X射线能谱(EDS)仪和原位红外光谱(IR)仪对复合材料内部结构、形貌特征进行表征分析,并利用电化学工作站对样品的电化学性能(包括交流阻抗、循环伏安、计时电位)进行测试研究。结果表明,NiCoLDHs呈花簇状,均匀分散在石墨烯表面,复合材料整体呈疏松的片层交错结构。镍钴比为3∶1的RGO/NiCoLDHs电化学性能最好,在0.5 A/g的电流密度下,其比电容高达39 F/g。Graphene/nickel-cobalt hydrotalcite(RGO/NiCoLDHs)nanocomposites were fabricated by a hydrothermal method using GO prepared by the modified Hummers method as raw materials.The crystal structure and micromorphology of the composites were studied by scanning electron microscope,energy dispersive spectrometer and in-situ infrared spectroscopy.The electrochemical properties of RGO/NiCoLDHs nanocomposites were investigated by cyclic voltammetry,galvanostatic charge-discharge and electrochemical impedance spectroscopy.The results show that NicoLDHs are flower clusters and evenly dispersed on the surface of graphene,and the composite is in a loose interlaced structure.The RGO/NiCoLDHs show the best electrochemical performance with the nickel cobalt ratio of 3∶1.At the current density of 0.5 A/g,the specific capacitance is 39 F/g.

关 键 词：石墨烯 镍钴类水滑石 复合材料 电化学性能 

分 类 号：O646[理学—物理化学]