Nano-cellulose whisker MoS2/graphene composite counter electrode material and preparation method and application thereof

Abstract

The invention discloses a preparation method of a nano-cellulose whisker MoS2/graphene composite electrode material, which comprises the following specific steps of treating one of cotton, wood pulp and bamboo pulp through sulfuric acid to obtain nano cellulose whisker, mixing the whicker with thiourea and sodium molybdate, and placing the mixture in a hydrothermal reaction kettle for hydrothermal reaction to obtain the MoS2 nanorods, then compounding the MoS2 nanorods with the graphene oxide, and carrying out high temperature carbonization of the compound in a nitrogen atmosphere to obtain a MoS2 nanorod/graphene composite material . The MoS2 nanorod/graphene composite material is directly applied to the counter electrode of the dye-sensitized solar cell. The dye-sensitized solar cell counter electrode material prepared based on the nano-cellulose whisker MoS2 nano,rod/graphene has a hollow nano rod structure and a great specific surface area, is beneficial to the permeation of electrolyte and the transmission of electrons, has more catalytic activity sites for the redox reaction. The method has the advantages of simple preparation process, low cost, environment friendliness and wide application prospect.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a nano-cellulose-based whisker MoS 2 And graphene electrode materials and their preparation methods and applications. Background technique [0002] With the depletion of fossil energy, energy issues and environmental issues have become the bottleneck of global economic development. Some renewable energy sources such as solar energy, wind energy, geothermal energy, and ocean energy are considered by most countries to be the most ideal substitutes for fossil energy. Solar energy will surely become one of the most promising clean energy for large-scale application in the new century due to its advantages of easy acquisition, safety, and no pollution. [0003] So far, solar cells are mainly divided into the following categories: silicon-based solar cells, polymer multilayer modified electrode solar cells, multi-element compound semiconductor thin-film solar cells and dye-sensitized nanoc...

AI Technical Summary

Problems solved by technology

Although Pt electrodes have many advantages and excellent performance, the price of platinum electrodes is too expensive, accounting for almost 60% of the entire battery cost

For one-dimensional inorganic nano-semiconductor materials, because electrons are easily trapped and lost at the interface and space when conducting through disordered nanoparticles, the collection and conversion efficiency of electrons is reduced.

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