江汉大学学报(自然科学版) ›› 2018, Vol. 46 ›› Issue (6): 485-492.doi: 10.16389/j.cnki.cn42-1737/n.2018.06.001

• 光电化学材料与器件研究 • 上一篇    下一篇

不同摩尔比对镍基金属有机骨架材料的电容性能影响研究

曹文杰,蔡俊,胡传正,徐俊晖,鲁珍,王亚珍*   

  1. 江汉大学 光电化学材料与器件教育部重点实验室,化学与环境工程学院,湖北 武汉 430056
  • 出版日期:2018-12-28 发布日期:2018-11-29
  • 通讯作者: 王亚珍
  • 作者简介:曹文杰(1992—),女,硕士生,研究方向:超级电容器。
  • 基金资助:
    光电化学材料与器件教育部重点实验室(江汉大学)开放基金项目(JDGD-2016008);工业烟尘污染控制湖北省重点实验室开放基金项目(HBIK2016-01);江汉大学研究生科研创新基金项目(001-2015-03)

Effects of Different Molar Ratio on Capacitive Performances of Ni-Based Metal Organic Frameworks Materials

CAO Wenjie,CAI Jun,HU Chuanzheng,XU Junhui,LU Zhen,WANG Yazhen*   

  1. Key Laboratory of Optoelectronic Chemical Materials and Devices,Ministry of Education,School of Chemical and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei,China
  • Online:2018-12-28 Published:2018-11-29
  • Contact: WANG Yazhen

摘要: 以六水合硝酸镍为金属源,以均苯三甲酸(BTC)为有机配体,通过一步水热法成功合成了一种镍基金属有机骨架(Ni-BTC MOFs)化合物,采用循环伏安、恒流充放电等技术对不同摩尔比下合成得到的Ni-BTC MOFs作为活动物质构建的超级电容器的电化学性能进行了测试,并用XRD和SEM对材料的结构和形貌进行了表征。考察了不同摩尔比的金属源和有机配体对Ni-BTC MOFs 的产量、晶型、形貌及比电容等的影响。实验结果表明,在反应温度为140 ℃,Ni∶BTC的摩尔比为1∶1时,将制备的Ni-BTC MOFs 作为超级电容器的电极活性材料,在1 A∕g电流密度下,充放电时间长达近784 s,比电容高达1 016. 3 F/g。在10 A/g电流密度下,循环950圈后比电容保持率为62. 1%。

关键词: 超级电容器, 金属有机骨架, 电极材料, 均苯三甲酸, 比电容

Abstract: In this paper,a kind of Ni- based metal- organic frameworks (Ni- BTC MOFs) was successfully synthesized based on the reaction of Ni(NO3)2 ·6H2O and 1,3,5-benzenetricarboxylic acid (BTC) by one- pot hydrothermal method. The electrochemical properties of Ni- BTC MOFs obtained under the different molar ratio of Ni∶BTC were investigated with cyclic voltammetry and galvanostatic charge-discharge technique. Their structure and surface morphology were characterized with XRD and SEM. The experimental results showed that the discharge time was up to 784 s and the specific capacitance was 1 016. 3 F/g at a current density of 1 A/g,Ni-BTC MOFs synthesized at the Ni to BTC ratio of 1∶1,the reaction temperature of 140 ℃,while the prepared Ni-BTC MOFs was used as the supercapacitor electrode material. The specific capacitance retention rate was 62. 1% after 950 cycles at the current density of 10 A/g.

Key words: supercapacitors, metal-organic frameworks, electrode material, 1, 3, 5-benzenetricarboxylic acid, specific capacitance

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