Super capacitor successfully developed 3D printing
Now in the field of electronics, battery life is very important. Whether it is a smartphone or tablet, people want to have the longest possible battery life, and many technology companies are heavily in this area of research and development. Recently, the University of California Santa Cruz and Lawrence Livermore National Laboratory scientists report an unprecedented performance results supercapacitors motor, the researchers used a printable graphene airgel manufacturing an electrode, to build a material with a Pseudocapacitance porous three-dimensional scaffold. Compared with batteries, they remain less energy in the same space, and they do not remain charged for a long time, but the technology advances supercapacitor so that they can compete with cell broader applications. In early experiments, researchers demonstrated using ultrafast super-capacitor electrode 3D printing graphene airgel manufactured in this new study, they improve graphene airgel porous scaffold fabricated and then loaded manganese oxide this is a common pseudocapacitance material. Pseudo capacitor is a super capacitor to store energy through the electrode reaction surface, so as to have properties like the main battery is higher than supercapacitor by an electrostatic mechanism for storing energy. But the problem is that pseudo capacitors, when the thickness of the electrode increases, since the structure of the slow diffusion of ions, the capacitance will decrease rapidly. Therefore, the challenge is to increase the quality of pseudo load capacitor material rather than sacrificing energy storage capacity per unit mass. The new study shows that, in terms of quality and capacitive load balancing pseudo capacitors to achieve a breakthrough, the researchers were able to increase quality in line with more than 100 milligrams per square centimeter of manganese oxide levels without compromising performance, while the typical level of commercial equipment about 10 mg / cm. Most importantly, as the mass of the load and the pseudocapacitive electrode thickness increases linearly manganese oxide, per gram of capacitance remains almost unchanged. This shows that even at such a high limit of the mass load, but also performance of the electrode from ion diffusion. The researchers noted, in conventional commercial manufacturing a super capacitor, a thin coating of electrode material is applied to a thin metal sheet as a current collector. Because of the increased thickness of the coating leading to performance degradation, so stacking a plurality of sheets to build a capacitance, since each of the metal collector increases weight and material cost. Researchers electrode thickness can be increased to 4 mm, and without any loss of performance. They have designed a periodic pore structureElectrode, the structure enables the material is uniformly deposited and effective diffusion of ions for charging and discharging. In addition to the lattice structure of the pores, the manganese oxide is electrodeposited on the graphene airgel lattice. The key innovation of this study is to use 3D printing to make reasonable structure design, providing a scaffold to support Pseudocapacitance carbon material. This capacitor has a surface area of more than, lightweight properties and excellent conductivity, will in the future play a commercial good performance.