Phosphorus-containing crosslinked gel polymer electrolyte and on-site thermal-polymerization preparation method and application thereof

Abstract

The invention belongs to the technical field of gel polymer electrolytes and particularly discloses a phosphorus-containing crosslinked gel polymer electrolyte and an on-site thermal-polymerization preparation method and application thereof. The preparation method comprises the steps of preparing the following raw materials, of which the total weight percent is 100%: 5-15% of polymerization monomers, 3-10% of crosslinker, 0.01-1.0% of thermal initiator and 75-90% of lithium-ion battery liquid electrolyte, uniformly mixing, and then, reacting for 20-100 minutes at the temperature of 75-150 DEG C under the protection of inert gas, thereby obtaining the phosphorus-containing crosslinked gel polymer electrolyte. The invention further discloses application of the phosphorus-containing crosslinked gel polymer electrolyte in the preparation of solid lithium-ion batteries. The invention provides novel phosphates and / or phosphonates, containing double bonds, which serve as monomers of the gel polymer electrolyte, and the phosphorus-containing crosslinked gel polymer electrolyte designed and synthesized from the monomers has the advantages of simple and convenient preparation method, high ionic conductivity, high thermal stability and good electrochemical stability, so that phosphorus-containing crosslinked gel polymer electrolytes with relatively good stability are provided for the practical application of the solid lithium-ion batteries and high-power lithium-ion batteries.

Description

technical field [0001] The invention belongs to the technical field of gel polymer electrolytes, in particular to a phosphorus-containing cross-linked gel polymer electrolyte and its preparation method and application by on-site thermal polymerization. Background technique [0002] Lithium-ion batteries using liquid electrolytes have gradually occupied a major share of the rechargeable battery market due to their excellent performance, and have dominated the field of portable mobile electronic devices such as notebook computers, mobile phones, and camcorders. High-tech products of great significance to the national economy and people's lives. At present, its application scope has been expanded to electric vehicles, space technology, national defense industry, etc., and it plays an increasingly important role in the development of the national economy and the people's livelihood. [0003] However, the use of liquid electrolytes also brings some problems, such as leakage, com...

AI Technical Summary

Problems solved by technology

But in general, there are few varieties of gel polymer electrolyte systems currently developed, and each has some problems, such as room temperature ionic conductivity is still difficult to meet high-power charging and discharging conditions, and mechanical strength is not enough for assembly and use. process requirements

Moreover, in the synthetic gel process, porous polymer electrolytes are mostly used at present. This method requires high operating conditions, unstable performance, and low mechanical strength.

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