Quasi-solid-state polymer gel electrolyte and preparation method thereof

Abstract

The invention provides a quasi-solid-state polymer gel electrolyte and a preparation method of the quasi-solid-state polymer gel electrolyte. The gel electrolyte comprises polymer macromolecule, a cross-linking agent, a solvent A or the solvent A containing an annexing agent, simple substance iodine and an iodine compound, wherein the cross-linking agent and the polymer macromolecule are interacted through acids and bases or can react with quaternary amine salinization to form a three-dimensional space cage construction. The quasi-solid-state polymer gel electrolyte has good electric conductivity, good solvent hold facility and good photoelectric conversion efficiency. The preparation method is simple and convenient to operate, cross-linking solidification reaction condition is mild, and the volume is not obvious shrinkage before and after gel. By the adoption of the gel electrolyte, the shape of a cell is designed limitlessly, and the gel electrolyte has a wide industrialization prospect in the application aspect of a dye-sensitized solar cell.

Description

technical field [0001] The invention relates to a quasi-solid polymer gel electrolyte and a preparation method thereof, belonging to the technical fields of photoelectric conversion and new energy. Background technique [0002] For a long time, liquid electrolytes containing iodine / iodide redox couples have been used as dye-sensitized nano-TiO 2 Hole transport materials for porous thin film solar cells (DSSCs). Due to the fast diffusion rate, high photoelectric conversion efficiency of the battery and the nano-TiO 2 Porous membranes are widely used due to their advantages such as good wetting. Although the liquid electrolyte solar cell has a high photoelectric conversion rate, it also has a series of problems: ①The sealing process of the liquid electrolyte battery is complicated, and the sealant used for packaging is easy to react with the electrolyte, resulting in leakage; ②The organic solvent of the liquid electrolyte is generally often Toxic, volatile, and adsorbed on ...

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Problems solved by technology

Although the liquid electrolyte solar cell has a high photoelectric conversion rate, it also has a series of problems: ①The sealing process of the liquid electrolyte battery is complicated, and the sealant used for packaging is easy to react with the electrolyte, resulting in leakage; ②The organic solvent of the liquid electrolyte is generally often Toxic, volatile, and adsorbed on TiO 2 The reaction of the dye on the porous film leads to the degradation of the dye, which affects the stability of the battery, which is not conducive to the practical application of the battery, and may affect the environment; ③The liquid electrolyte itself is unstable and prone to chemical changes, leading to the failure of the solar cell; ④Carrier migration The rate is slow, and the photocurrent is unstable under strong light; ⑤In addition to redox cycle reactions, liquid electrolytes also have irreversible reactions; ⑥The shape design of solar cells is limited

However, this patent does not involve the long-term photoelectric stability of dye-sensitized solar cells assembled with gel electrolytes. In terms of technology, gel electrolytes are prepared first, and then batteries are assembled with gel electrolytes. Wetting and penetration problems, it is difficult to further improve the photoelectric conversion efficiency

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