多孔钴-镍-锌氧化物/碳纳米复合材料的制备及其在超级电容器中的应用

doi:10.3969/j.issn.2095-4239.2014.06.007

储能科学与技术 ›› 2014, Vol. 3 ›› Issue (6): 607-613.doi: 10.3969/j.issn.2095-4239.2014.06.007

多孔钴-镍-锌氧化物/碳纳米复合材料的制备及其在超级电容器中的应用

张水蓉, 刘开宇, 易小艺, 何方, 谢清亮

中南大学化学化工学院,湖南长沙 410083

收稿日期:2014-08-23 出版日期:2014-11-01 发布日期:2014-11-01
通讯作者: 刘开宇,教授,从事化学电源,超级电容器及其相关材料的研究开发工作,E-mail:kaiyuliu309@163.com.
作者简介:张水蓉(1989--),女,硕士研究生,研究方向为电池及超级电容器电极材料的研究及制备,E-mail:feiyangzsr@163.com;
基金资助:
国家自然科学基金(21471162),龙岩市科技计划项目(2014LY36)

Preparation and electrochemical performance of the novel porous cobalt-nickel-zinc oxides/carbon nanocomposites

ZHANG Shuirong, LIU Kaiyu, YI Xiaoyi, HE Fang, XIE Qingliang

College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China

Received:2014-08-23 Online:2014-11-01 Published:2014-11-01

摘要/Abstract

摘要： 以Co(NO₃)₂·6H₂O 和 Ni(NO₃)₂·6H₂O为原料,金属有机骨架材料MOF-5为模板剂和碳锌的原料来源,制备了前驱体,随后通过高温煅烧法合成了多孔钴-镍-锌氧化物/碳纳米复合物.应用X射线衍射,扫描电子显微镜和氮气吸附-脱附测试等手段对样品的微观结构和表面形貌进行研究,发现钴-镍-锌氧化物/碳复合物有多孔结构,比表面积高达155 m²/g.采用循环伏安,恒电流充放电和交流阻抗等方法研究了样品的电化学性能.结果表明,在1 A/g的电流密度下,钴-镍-锌氧化物/碳纳米复合物的比容量为804 F/g,远高于钴-镍氧化物的比容量(180 F/g),且1000次循环后其比容量仍保持94.4%;在高电流密度10 A/g下,比容量保持率为90%.

关键词: 钴-镍-锌氧化物/碳纳米复合物, MOF-5, 模板法, 超级电容器

Abstract: Metal-organic frameworks (MOF-5) as template and the sources of carbon and zinc, the cobalt-nickel-zinc oxides/carbon nanocomposites have been synthesized by impregnation method following by a calcinations procedure. The microstructure and morphology of Co-Ni-Zn oxides/C composite are characterized by XRD,SEM,EDS and nitrogen adsorption/desorption experiment. The result shows that the Co-Ni-Zn oxides/C composites display a porous structure with a specific surface area of 155 m²/g. The electrochemical performances are investigated by CV, galvanostatic charge-discharge tests and EIS. The specific capacitance of as-prepared porous Co-Ni-Zn oxides/C composites is 804 F/g at 1 A/g with the retention ratio of 94.4% after 1000 cycles, which is much higher than that of Co-Ni oxides (180 F/g). The high rate discharge (HRD) for porous Co-Ni-Zn oxides/C composites reaches to 90% at 10 A/g.

Key words: cobalt-nickel-zinc oxides/carbon composites, MOF-5, template method, supercapacitors

中图分类号:

TM53

张水蓉, 刘开宇, 易小艺, 何方, 谢清亮. 多孔钴-镍-锌氧化物/碳纳米复合材料的制备及其在超级电容器中的应用[J]. 储能科学与技术, 2014, 3(6): 607-613.

ZHANG Shuirong, LIU Kaiyu, YI Xiaoyi, HE Fang, XIE Qingliang. Preparation and electrochemical performance of the novel porous cobalt-nickel-zinc oxides/carbon nanocomposites[J]. Energy Storage Science and Technology, 2014, 3(6): 607-613.

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多孔钴-镍-锌氧化物/碳纳米复合材料的制备及其在超级电容器中的应用

Preparation and electrochemical performance of the novel porous cobalt-nickel-zinc oxides/carbon nanocomposites

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