多孔镍膜-CNTs复合电极的制备与性能研究
发布时间：2018-08-28 08:18
【摘要】：随着社会发展以及全球人口的持续增加,能源的耗损量不断增大,此外,化石能源的过度开发利用造成的环境污染等问题,也使得寻求清洁可再生资源的需求更为迫切。伴随着风能、太阳能等不能持续供给的清洁能源发展起来的是各类的能源存储器件如超级电容器、锂离子电池等。其中超级电容器因其优于锂离子电池的超高功率密度而受到广泛关注。超级电容器的组成结构主要包括电极材料、集流体、电解液和隔膜等。其中,电极材料中活性物质的含量直接影响超级电容器的电化学性能。常用的集流体材料如泡沫金属孔径在500μm左右,活性材料仅覆盖在其骨架表层,空间利用率很低。为了提高单位体积内活性物质的含量,进而提高超级电容器的能量密度,本课题制备了薄层、轻质、柔韧、孔径均匀的多孔镍平板膜。采用化学气相沉积(CVD)的方式生长碳纳米材料,系统的研究了不同种类的催化剂在多孔镍基载体上生长CNFs等碳纳米材料的各影响因素及表现方式,对得到的碳纳米材料的形貌和性能进行了表征和测试。本实验制备的多孔镍平板膜厚度最小在20 μm,孔径分布在5-10 μm。此外,以多孔镍平板膜为基体550℃可生长直径在20 nm的CNTs,40 μm厚的多孔镍膜单位平方厘米可生长0.002g的碳纳米材料。5 mV/s的扫描速率下电容性能由经等离子处理提高到224F/g以上。
[Abstract]:With the development of society and the continuous increase of global population, the amount of energy consumption is increasing. In addition, the environmental pollution caused by the excessive exploitation and utilization of fossil energy makes the demand for clean and renewable resources more urgent. With the development of clean energy, such as wind energy and solar energy, various energy storage devices such as supercapacitors, lithium ion batteries and so on have been developed. Among them, supercapacitors have attracted much attention because of their superior ultrahigh power density to lithium ion batteries. The structure of supercapacitor mainly includes electrode material, fluid collection, electrolyte and diaphragm. Among them, the content of active material in electrode material directly affects the electrochemical performance of supercapacitor. The commonly used fluid collecting materials such as foam metal pore size is about 500 渭 m, the active material is only covered in the surface layer of the skeleton, and the space utilization ratio is very low. In order to increase the content of active substances in unit volume and increase the energy density of supercapacitors, thin, light, flexible and uniform porous nickel plate films were prepared in this paper. Carbon nanomaterials were grown by chemical vapor deposition (CVD). The factors affecting the growth of CNFs and other carbon nanomaterials such as CNFs on porous nickel based support were systematically studied. The morphology and properties of the carbon nanocomposites were characterized and tested. The thickness and pore size distribution of the porous nickel plate membrane were 20 渭 m and 5-10 渭 m respectively. In addition, a porous nickel film with a diameter of 20 nm and a thickness of CNTs,40 渭 m at 550 鈩，
本文编号：2208822
[Abstract]:With the development of society and the continuous increase of global population, the amount of energy consumption is increasing. In addition, the environmental pollution caused by the excessive exploitation and utilization of fossil energy makes the demand for clean and renewable resources more urgent. With the development of clean energy, such as wind energy and solar energy, various energy storage devices such as supercapacitors, lithium ion batteries and so on have been developed. Among them, supercapacitors have attracted much attention because of their superior ultrahigh power density to lithium ion batteries. The structure of supercapacitor mainly includes electrode material, fluid collection, electrolyte and diaphragm. Among them, the content of active material in electrode material directly affects the electrochemical performance of supercapacitor. The commonly used fluid collecting materials such as foam metal pore size is about 500 渭 m, the active material is only covered in the surface layer of the skeleton, and the space utilization ratio is very low. In order to increase the content of active substances in unit volume and increase the energy density of supercapacitors, thin, light, flexible and uniform porous nickel plate films were prepared in this paper. Carbon nanomaterials were grown by chemical vapor deposition (CVD). The factors affecting the growth of CNFs and other carbon nanomaterials such as CNFs on porous nickel based support were systematically studied. The morphology and properties of the carbon nanocomposites were characterized and tested. The thickness and pore size distribution of the porous nickel plate membrane were 20 渭 m and 5-10 渭 m respectively. In addition, a porous nickel film with a diameter of 20 nm and a thickness of CNTs,40 渭 m at 550 鈩，
本文编号：2208822
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