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) allyl borate pinacol, trimethylolpropane triacrylate, Pentaerythritol tetramercaptoacetate, propylene carbonate and benzoin dimethyl ether were stirred and mixed evenly until completely dissolved to obtain solution A; (2) solution A obtained in step (1) was dropped onto the electrospun PVDF membrane to infiltrate evenly, and transferred Under ultraviolet light, an ultraviolet photopolymerization reaction occurs to obtain an anion acceptor type single ion conductor flame retardant gel polymer film; (3) the anion acceptor type single ion conductor flame retardant gel polymer film obtained in step (2) is placed After soaking completely in the electrolyte mixture, the anion acceptor type single ion conductor flame retardant gel polymer electrolyte is obtained. The invention also provides the anion acceptor type single ion conductor flame retardant gel polymer electrolyte prepared by 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...

AI Technical Summary

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.

Images