Preparing method and application of polymer electrolyte

Abstract

The invention belongs to the field of polymer electrolytes, and relates to a preparing method and application of a polymer electrolyte. According to the preparing method, a first reactant containing sulfydryl terminals and a second reactant with the two ends containing acrylate terminals are taken as raw materials, and under the function of a main catalyst and a cocatalyst, a sulfydryl-Michael addition reaction is carried out for preparing the polymer electrolyte. The first reactant at least contains three sulfydryl groups; the main catalyst is used for capturing protons on the sulfydryl groups of the first reactant to form thioalcohol negative ions, and the thioalcohol negative ions are used for attacking electron-deficiency double bonds in the second reactant; metal salt serves as the cocatalyst; positive ions of the metal salt and the second reactant are subjected to a complex reaction, so that the electron cloud density of the double bonds of acrylate is lowered, the process that the thioalcohol negative ions attack the double bonds of the acrylate for the sulfydryl-Michael addition reaction is promoted, and the reaction speed and the conversion rate of the addition reaction are increased.

Description

technical field [0001] The invention belongs to the field of polymer electrolytes, and relates to a method for preparing polymer electrolytes and applications thereof, and more specifically, to a method for preparing polymer electrolytes by mercapto-Michael addition reaction catalyzed by metal salts. Background technique [0002] "Click" chemistry has attracted a lot of attention since it was proposed by Kolb, Finn, and Sharpless in 2001. Its advantages include fast reaction rate, quantifiable yield, almost no side reactions, and avoids the shortcomings of a series of common synthetic reactions. , such as time-consuming product separation and harsh reaction conditions. Therefore, "click" chemistry is widely used in the field of macromolecular synthesis such as polymer functionalization and network preparation. There are generally two pathways for thiol-ene reactions: (1) free radical-mediated addition reactions, commonly known as thiol-ene reactions; (2) thiol-Michael addit...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a preparation method and application of a polymer electrolyte, which relies on metal salt-promoted mercapto-Michael addition reaction to achieve, wherein metal salt cations are used to contain The complexation of reactants with electron-deficient terminal double bonds reduces the electron cloud density of electron-deficient double bonds, making it easier for thiol anions to attack the electron-deficient double bonds to undergo thiol-Michael addition reaction and increase the reaction rate of the addition reaction and conversion rate, thereby increasing the cross-linking density of the electrolyte and inhibiting the crystallization of the polymer electrolyte, thereby solving the problems of complex production process, harsh reaction conditions and high crystallinity of the solid electrolyte in the existing solid electrolyte preparation method question

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