| NiCo2O4/氧化石墨烯复合材料制备与电化学性能研究 |
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| 引用本文： | 魏文硕,宋朝霞,曾森,孙囡翾,刘伟.NiCo2O4/氧化石墨烯复合材料制备与电化学性能研究[J].材料科学与工艺,2018,26(5):47-53. |
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| 作者姓名： | 魏文硕 宋朝霞 曾森 孙囡翾 刘伟 |
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| 作者单位： | 大连理工大学 化工学院,辽宁 大连 116024;大连民族大学 生命科学学院,辽宁 大连116600,大连民族大学 生命科学学院,辽宁 大连116600,中广核工程有限公司,广东 深圳 518124,大连理工大学 化工学院,辽宁 大连 116024,大连理工大学 化工学院,辽宁 大连 116024 |
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| 基金项目： | 辽宁省自然科学基金资助项目 (201602197). |
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| 摘 要： | 为了研究NiCo2O4/氧化石墨烯(NiCo2O4/GO)复合材料的电化学性能，本文通过先水热合成前驱体再煅烧的方法制备了一系列NiCo2O4/GO复合材料.利用X射线衍射(XRD)、扫描电子显微镜(SEM)和电化学方法对其进行物理表征，其中以GO质量浓度为1 mg/mL悬浊液制备出的NiCo2O4 /GO-3复合材料呈类海胆状结构.在1 M KOH水溶液中使用循环伏安法、恒电流充/放电法和交流阻抗法研究了NiCo2O4/GO复合材料电化学性能.研究表明，与纯NiCo2O4相比，制备的NiCo2O4 /GO复合材料的比容量和赝电容性能均有明显提高，这主要是由于NiCo2O4 /GO复合材料中NiCo2O4与GO纳米片的相互作用形成的高孔隙率复合结构；NiCo2O4 /GO-3复合材料在电流密度为0.5~3.0 A/g时，比电容超过650 F/g，具有良好的倍率性能和高比容量.采用本文方法合成的NiCo2O4/GO复合材料，既提高了其倍率性能又保证了高比容量，是一种良好的超级电容器电极材料.
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| 关 键 词： | 超级电容器 电极材料 NiCo2O4 GO 复合材料 |
| 收稿时间： | 2017/9/28 0:00:00 |
Preparation and electrochemical properties of sea urchin-like NiCo2O4/Go composites |
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| WEI Wenshuo,SONG Zhaoxi,ZENG Sen,SUN Nanxuan and LIU Wei.Preparation and electrochemical properties of sea urchin-like NiCo2O4/Go composites[J].Materials Science and Technology,2018,26(5):47-53. |
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| Authors: | WEI Wenshuo SONG Zhaoxi ZENG Sen SUN Nanxuan and LIU Wei |
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| Affiliation: | School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China ;College of Life Science, Dalian Minzu University, Dalian 116600, China,College of Life Science, Dalian Minzu University, Dalian 116600, China,China Nuclear Power Engineering Co., Ltd., Shenzhen 518124, China,School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China and School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | The composites of NiCo2O4/graphene oxide nanosheets(NiCo2O4/GO) were prepared through a facile hydrothermal route followed by calcination. The morphology and microstructure of the products were characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM). It was found that the composite materials showed a sea urchin-like structure. Electrochemical properties were investigated using cyclic voltammetry and galvanostatic charge/discharge in 1 M KOH aqueous solution. In comparison with pure NiCo2O4, the specific capacity and rate performance of the as-made NiCo2O4/GO composites were significantly improved. This is mainly attributed to the high-density porous structures of the NiCo2O4/GO nanocomposites that were formed during the fabrication process. The NiCo2O4/GO composites showed good cyclic performance and coulomb efficiency with a specific capacitance over 650 F/g at a current density of 0.5 to 3.0 A/g, therefore they can be considered as a fine electrode material for surpercapactiors. |
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| Keywords: | supercapacitor electrode material NiCo2O4 GO composite material |
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