Self-supporting lithium ion battery gel polymer electrolyte and preparation method thereof

A lithium-ion battery, gel polymer technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of unsatisfactory electrochemical stability window, unsatisfactory ionic conductivity, and narrow applicable temperature range. Excellent liquid absorption and liquid holding capacity, good electrochemical stability, high production efficiency
CN101409364AActive Publication Date: 2009-04-15SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2009-04-15

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Abstract

The invention discloses a self-supported lithium ion battery gel polymer electrolyte and a preparation method thereof. In the invention, at first, a multi-polymer is obtained by polymerizing the latexes of a methacrylic acid N-Butyl Acetate monomer and a styrene monomer of different proportions; then under the condition of ultrasonic, 10 to 30 minutes after a certain amount of nanometer particles are dispersed in a tetrahydrofuran solvent, the powder of the polymer is dissolved into the liquor to obtain ropy gel; a self-supported lithium ion battery gel polymer membrane is obtained by a phase transfer method; the membrane is dipped into the electrolyte, thus obtaining the gel polymer electrolyte. The gel polymer electrolyte is good in thermal stability, has a high decomposition temperature, is simple in preparation technique and is suitable for the industrial production of the lithium ions of the polymer, with the raw materials easily gotten.
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Description

Technical field

[0001] The invention relates to the field of lithium ion batteries, in particular to a self-supporting gel polymer electrolyte for lithium ion batteries and a preparation method thereof. Background technique

[0002] A new type of lithium ion battery developed on the basis of liquid lithium ion battery-gel polymer lithium ion battery, due to the use of polymer matrix, the liquid organic solvent is directly converted into gel state, which has high safety performance and circulation Good performance, long storage life, wide operating temperature range, large specific energy and no memory effect. As the core part of gel polymer lithium ion batteries-the research of gel polymer electrolyte (GPE) has attracted attention at home and abroad. So far, many polymers used as GPE matrix have been reported, such as polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), polymethylmethacrylate (PMMA), polyethylene oxide (PEO), polychloride Vinyl (PVC) etc. However, due to the ...

Claims

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