Electrolyte based on zinc iodide and application thereof

Abstract

This invention relates to an electrolyte based on ZnI2 with the following formula: ZnI2(L)n+mM+wI2+xG+yCP+zA, in which, ligand L is an organic material coordinated with ZnI2 in following number: 0<=n<=6, the solvent M includes amine, mellow, acid nitrile, aether and ester organic solvents and their mixtures or ionic solution, the mol ratio of which to the ZnI2 is 0<=m<=2000, the mol ratio of I simple substance to ZnI2 is 0<=w<=0.5, the gel G is an organic compound of small molecules or an organic compound of high molecules and the mol ratio of which to the ZnI2 is 0<=x<=1 and that of ceramic powder to ZnI2 is 0<=y<=5 and additive A is a compound capable of improving performance of electrolyte and the ratio to the ZnI2 is 0<=z<=2.

Description

Technical field

[0001] The invention relates to an electrolyte material, in particular to an electrolyte based on zinc iodide, and its application in dye-sensitized solar cells and other energy conversion and storage devices. Background technique

[0002] In 1991, Professor Grötzel Michael of the Swiss Federal Institute of Technology and his collaborators published an article in the journal Nature (Nature, Vol. 353, page 737, 1991 (Nature, Vol. 353, 737, 1991)), introducing A new type of solar cell-dye-sensitized solar cell. This kind of battery has simple preparation process, low cost and high efficiency, so it has attracted wide attention from scientists all over the world. At present, the electrolytes used in this battery are mainly divided into three categories: one is to dissolve inorganic or organic iodide in organic solvents such as acetonitrile, methoxyacetonitrile, methoxypropionitrile, ionic liquid, etc., to form a liquid electrolyte; A gel electrolyte or ceramic powder...