Gel polymer electrolyte, polymer lithium ion battery and making method of polymer lithium ion battery

A gel polymer and lithium-ion battery technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, non-aqueous electrolytes, etc., can solve problems such as low reaction conversion rate, battery performance degradation, uncontrollable polymerization, etc., to achieve reaction conversion High efficiency, inhibition of lithium dendrites, and low cost
CN103633367AActive Publication Date: 2014-03-12BYD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BYD CO LTD
Publication Date
2014-03-12

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Abstract

The invention provides a gel polymer electrolyte. A polymer membrane absorbs an electrolyte and swells to form the gel polymer electrolyte, and the polymer membrane is formed through thermocuring self-crosslinking of a liquid polymer mixture; and the liquid polymer mixture contains a pure acrylic emulsion, water and ammonia water, and the glass transition temperature of the pure acrylic emulsion is -30 - 50 DEG C. The invention also provides a polymer lithium ion battery adopting the gel polymer electrolyte, and a making method of the polymer lithium ion battery. The gel polymer electrolyte has the advantages of substantial improvement of the security, stable electrochemical performances and high voltage resistance, can realize the inhibition of the generation of lithium dendrites, no liquid leakage, substantial improvement of the security and good cycle stability when the gel polymer electrolyte is used in the polymer lithium ion battery, and is more suitable for lithium ion power batteries.
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Description

technical field

[0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a gel polymer electrolyte and a polymer lithium ion battery. Background technique

[0002] Polymer lithium ion battery is a new generation of high specific energy secondary battery system developed on the basis of liquid lithium ion battery. The general structure of a polymer lithium ion battery includes a positive electrode, a negative electrode, and a polymer electrolyte between the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material, and the negative electrode includes a negative electrode current collector and a negative electrode active material. The positive electrode active material and The negative electrode active material is disposed opposite to each other, and is contained in the battery case together with the polymer electrolyte. Compar...

Claims

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