Anion acceptor type single-ion conductor flame-retardant gel polymer electrolyte and preparation method thereof

Abstract

The invention discloses a preparation method of an anion acceptor type single-ion conductor flame-retardant gel polymer electrolyte, which comprises the following steps: (1) uniformly stirring and mixing allyl boronic acid pinacol ester, trimethylolpropane triacrylate, pentaerythritol tetramercaptoacetate, propylene carbonate and benzoin dimethyl ether until the components are completely dissolvedto obtain a solution A; (2) dripping the solution A obtained in the step (1) on an electrostatic spinning PVDF (Polyvinylidene Fluoride) membrane, uniformly infiltrating, transferring to ultravioletlight, and carrying out ultraviolet light polymerization reaction, so as to obtain an anion acceptor type single ion conductor flame-retardant gel polymer membrane; and (3) completely soaking the anion receptor type single ion conductor flame-retardant gel polymer membrane obtained in the step (2) in an electrolyte mixed solution to obtain the anion receptor type single ion conductor flame-retardant gel polymer electrolyte. The invention also provides the anion acceptor type single-ion conductor flame-retardant gel polymer electrolyte prepared by adopting the preparation method.

Description

technical field [0001] The invention belongs to the field of polymer electrolytes, in particular to an anion acceptor type single ion conductor flame retardant gel polymer electrolyte and a preparation method thereof. Background technique [0002] Traditional lithium-ion batteries use liquid electrolytes, usually composed of organic liquids and lithium salts. However, these organic liquids such as dimethyl carbonate (DMC), diethyl carbonate (DEC) and ethylene carbonate (EC) are easily Inflammable and explosive substances, there are many safety hazards (such as combustion, explosion, leakage, etc.) in the use of lithium-ion batteries. Polymer electrolytes are composed of ion-conducting polymers and lithium salts, which are safer than liquid electrolytes and can be used as electrolytes and separators at the same time. However, polymer electrolytes are generally dual ion conductors, that is, in polymer electrolytes, both lithium ions and anions migrate during charge and discha...

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Problems solved by technology

In addition, anion does not react with the electrode, and accumulation at the electrode will cause concentration polarization, which will hinder the conduction of lithium ions, resulting in an increase in impedance and ultimately reducing the energy efficiency of the battery.

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