Preparation And Properties Of Porous Nickel Membrane-CNTs Composite Electrode

With the development of the social sciences and the increase of the global population,energy play an important part in our modern daily life.The increasing consumption of energy,and unreasonable usage of it made the environmental pollution worse,therefore seeking make the clean and renewable resources become extremely urgent.Along with the development of wind energy,solar energy and other clean energy that can't continue to supply,all kinds of energy storage devices have been developed,such as super capacitors,lithium-ion batteries,etc.Supercapacitors are superior to lithium-ion batteries because of its ultra-high power density and sought after by everyone.According to the different electrode materials Supercapacitors can be divided into three categories including pseudocapacitors,electric,double layer capacitors and hybrid capacitors.The composition of the supercapacitor including electrode materials,electrolytes and membranes.Among them,the active material content of electrode material directly affects the electrochemical performance of supercapacitor.Commonly used fluid materials such as foam metal with pore diameter of 500 ?m,the active material is only covered in the skeleton surface,the space utilization is very low.In order to improve the content of active material in per unit volume and improve the energy density of supercapacitor,a thin,lightweight,flexible and uniform porous nickel platform membrane was prepared.The growth of carbon nanomaterials by chemical vapor deposition(CVD)was studied systematically.The influencing factors and performance modes of carbon nanotubes such as CNFs grown on different porous nickel-based catalysts were systematically studied.The morphology and properties of the obtained carbon nanomaterials were characterized and tested.The results show that the self-made porous nickel platform membrane made the initial idea come true,it can be made about 20 ?m thickness,pore size distribution in 5-10 ?m.The amount of active material per unit volume is increased as compared to commercial foam nickel.In addition,CNTs with diameter of 20 nm can be grown at 550? with self-made porous nickel as matrix.A porous nickel film of 40 ?m thick can grow 0.002 g of carbon nanomaterials per square centimeter.5 mV/s scan rate of the performance by plasma treatment can be increased to 224 F/g.