Graphene color paste, preparation method thereof and application in fuel cells

Abstract

The invention discloses a graphene color paste, which comprises the following raw materials in parts by weight: 10-18 parts of graphene, 1-10 parts of a dispersing agent, 3-5 parts of a stabilizing agent, 5-10 parts of a cosolvent, 1-3 parts of a defoaming agent and 8-28 parts of water. The preparation of the graphene color paste by adopting the above raw materials includes the steps of adding water, the dispersing agent, the stabilizing agent and the cosolvent into a high-speed shearing and grinding machine, and carrying out pretreatment for 10-15min to obtain a material A; adding graphene into the material A and stirring to obtain a material B; and adding the defoaming agent into the material B in the step (3) and stirring to obtain the graphene color paste. In the invention, the graphene color paste prepared by adopting graphene as the main raw material does not have the conditions such as agglomeration and non-uniform dispersion when being applied to the fuel cells.

Description

technical field [0001] The invention relates to the technical field of graphene materials, in particular to a graphene color paste, its preparation method and its application in fuel cells. Background technique [0002] With the depletion of fossil energy such as coal and oil, human society is facing an increasingly serious energy crisis. In the process of using fossil energy, polluting gases such as sulfide, nitrogen oxide, and carbon oxide have already It has brought huge damage to the environment. As a renewable, clean and pollution-free new energy source, fuel cells are attracting more and more attention. As one of the most important components of fuel cells, catalysts are closely related to the performance indicators of fuel cells, and have always been the research focus of fuel cell and catalyst researchers. [0003] At present, the carrier of fuel cells generally chooses carbonaceous materials with good conductivity and high specific surface area, such as graphite, ...

AI Technical Summary

Problems solved by technology

However, although graphene is used as a carrier material for fuel cells, graphene is not suitable for continuous large-scale production due to its high price and high cost of raw materials, and it is easy to agglomerate with nanoparticles, resulting in uneven dispersion of graphene in the electrolyte. , reduce the transport characteristics of electrons, and the use of noble metal platinum and gold materials will further increase the cost, which is not conducive to the large-scale application of fuel cells

Furthermore, the use of nano-metal iron, cobalt, and nickel is very easy to cause catalyst poisoning, loss of catalytic activity, and poor catalytic stability are the main reasons that seriously restrict the application.

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