Acumulador de energía en base a Ni-Fe y sensor de temperatura producidos con la técnica: Grafeno Inducido por Laser (LIG) con láser de bajo costo.

Abstract

The use of laser is increasingly present in our life. One of the applications developed by the University of Rice in 2014 was the production of graphene with a porous three -dimensional structure on a polyimide tape. The laser used was CO2 whose wavelength is 10.6 μm and the technique is called laser -induced graphene (LIG). The main difficulty that the technique presents is the access and cost of CO2 laser. This work demonstrates how it is possible access this technique and produce devices from below cos. This energy accumulator Case based on the Ni-Fe-FE Edison battery and a temperature sensor. While devices are already being developed with this technique, such as electrodes for portable potentiostats, it is still in an incial stage. Market demand is far superior to the supply present at this time. The same laser printing technique was used, with a 450 nm wavelength laser, a low -cost table laser. Different power and speed configurations to calibrate printing were made on a polymine citna. As known, graphene is a driver and the parameter we use in the first mometno was resistance per mm. The best value obtained was 15.3 Ω/cm. Verified with a four-pointed Kelvin micro-ohmimeter, an test was performed with a drx, X-ray diffraction. The values obtained are similar to those published by the University of Rice. After verifying that the material obtained was 3D porous graphene, graphene undertaken by laser LIG here in Mas, we went to the construction of the propositions. LIG is formed by carbon atoms and one of the properties of this element is that it changes its resistance when it changes the temperature to which it is. The temperature sensor is built based on a voltage divisor. The other device is an energy accumulator based on Ni-FE. Two electrodes were made in plate format. Nickel and iron were electrodeposited on one plate. The electrolyte used was KOH 6 M with a cellulose separator. Electrochemical tests were performed verifying that the device has a behavior similar to that of a battery. The values achieved are 30mA maximum current in three cell connected in parallel and 1.4 C load. This technique allows the development of new low cost devices.