Manufacturing method of hydrogen oxygen fuel cell display plate type teaching aid

Abstract

The invention relates to a manufacturing method of a hydrogen oxygen fuel cell display plate type teaching aid. The manufacturing method comprises the following steps that 1) laboratory supplies are prepared; 2) rubber plugs with graphite electrodes are plugged at two openings of a Y-shaped tube, and the sealing is carried out; 3) saturated Na2SO4 solution is filled into the Y-shaped tube, and after air is completely exhausted, the open ends are submerged in the saturated Na2SO4 solution in a beaker; 4) a direct-current power supply is switched on, and the electrolysis is carried out; 5) when gas generated through electrolysis exceeds the length of the graphite electrodes, water electrolysis automatically stops working; and 6) light emitting diodes are connected by conducting wires to form a fuel cell, and the illumination of the diodes is observed. The manufacturing method has the advantages that fuel cell class demonstration experiments have achieved effects that higher current can be generated so that the diodes illuminate, music cards make sound, small lamp beads illuminate, small motors rotate, and the like; the persuasion and the interestingness are enhanced, and the practical value is also shown.

Description

technical field [0001] The invention relates to teaching aids for chemistry classroom experiments in elementary and high schools, which help students understand the composition of water, perceive hydrogen-oxygen fuel cells, and understand the application of chemical principles in the fields of energy and high-tech. Background technique [0002] "Electrolysis of water" and "hydrogen-oxygen fuel cell" are important contents in the chemistry course "mutual conversion of chemical energy and electrical energy" in middle and high school. The textbook first allows students to understand that hydrogen energy is a green energy in the junior high school stage, understand the energy conversion method of chemical batteries (including fuel cells) when they are discharged, and lay the foundation for further learning the working principles of fuel cells in high school. [0003] Since the ninth grade textbook only provides a simple introduction to the fuel cell without schematic diagrams an...

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Problems solved by technology

[0003] Since the ninth grade textbook only provides a simple introduction to the fuel cell without schematic diagrams and experiments, it is very likely that students will have doubts about "whether it can provide electricity to the outside world"

Although there are related demonstration experimental devices for fuel cells in the chemistry textbooks of the new high school curriculum, there are mainly the following problems in carrying out experiments according to the devices in the textbooks: (1) The assembly of the experimental devices is not simple enough; (2) As a demonstration experiment, the experimental phenomena are not enough It is obvious and intuitive, and the phenomenon cannot be clearly observed by the whole class. (3) The experimental operation is not convenient, especially the operation of filling the electrolytic chamber with electrolyte is difficult. (4) The experimental process is not conducive to students' understanding of electrolyzed water and hydrogen-oxygen fuel. The relationship between batteries, understanding how fuel cells work

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