Hydrophilic lithium sulfonate terpolymer and preparation method thereof

A terpolymer and lithium sulfonate technology are applied in the fields of hydrophilic lithium sulfonate terpolymer and its preparation, lithium ion polymer and its preparation, and can solve the problems of low chemical stability and low performance of the copolymer, and the like, Achieve the effect of improving charge and discharge performance, improving chemical stability, and reducing polarization
CN112279952AActive Publication Date: 2021-01-29氟金(上海)新材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
氟金(上海)新材料有限公司
Publication Date
2021-01-29

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Abstract

The invention discloses a hydrophilic lithium sulfonate terpolymer and a preparation method thereof. The hydrophilic lithium sulfonate terpolymer is a copolymer containing a polyvinylidene fluoride structural unit composed of vinylidene fluoride monomers, a vinyl pyrrolidone structural unit composed of vinyl pyrrolidone monomers and a perfluorovinyl ether lithium sulfonate structural unit. The preparation method comprises the following steps: respectively adding a vinylidene fluoride monomer, a vinyl pyrrolidone monomer, lithium perfluorovinyl ether sulfonate and an initiator into a reaction device, and carrying out one-step copolymerization by adopting a polymerization reaction method. According to the invention, the structural advantages of polyvinylidene fluoride are retained, the existing defects are overcome, and the chemical stability is improved; by introducing the ion efficient transmission structure unit, the transmission efficiency of lithium ions is optimized, the ionic conductivity of the lithium battery is improved, the polarization of the battery in the charging process can be reduced, and the charging and discharging performance is improved; hydrophilic groups are introduced to improve hydrophilicity, so that the adsorption capacity of the electrolyte and the migration rate of lithium ions are improved.
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Description

technical field

[0001] The invention relates to a lithium ion polymer and a preparation method thereof, in particular to a hydrophilic lithium sulfonate terpolymer and a preparation method thereof, and belongs to the technical field of lithium ion polymer battery production and manufacture. Background technique

[0002] Lithium polymer battery is the most advanced rechargeable battery today. At present, major scientific and technological powers in the world are conducting vigorous research and development.

[0003] Polymer lithium-ion batteries have the characteristics of small size, light weight, high energy density, small self-discharge, no memory effect, good safety performance, and can be made into any shape. At the same time, because the electrolyte of existing lithium-ion rechargeable batteries is relatively Many, high flammability, difficult to guarantee safety, and lithium-ion polymer rechargeable batteries use porous polymer materials as electrolytes, reducing the e...

Claims

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