Activated gel state lithium ionic cell polymer electrolyte film, preparation and use thereof

A technology of lithium ion battery and electrolyte film, applied in the field of activated gel state lithium ion battery polymer electrolyte film and its preparation, can solve the problem that the electrochemical and interface stability cannot meet the requirements of large-scale application, difficult lithium ion battery, Problems such as poor mechanical properties and interface stability, to achieve the effects of excellent mechanical stability and film formation, simple process, and improved interface stability
CN101353435AInactive Publication Date: 2009-01-28SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2009-01-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an activated form gel type lithium ion battery polyelectrolyte film, a preparation method and application thereof. The invention prepares P(AN-VAc) powder by using monomer acrylonitrile and vinyl acetate or prepares P(AN-MMA) power by using acrylonitrile and methyl methacrylate; and prepares a P(AN-VAc) or P(AN-MMA) polymeric matrix film on the basis; an activated form polymer film is obtained by drying after the P(AN-VAc) or P(AN-MMA) polymeric matrix film is immersed into polymethyl methacrylate gel to be activated, and an activated form gel type lithium ion battery polyelectrolyte is obtained by immersing the activated form polymer film into an electrolytic solution. Compared with the unactivated P(AN-VAc) polyelectrolyte film, the activated form P(AN-VAc) / PMMA polyelectrolyte film obtained by adopting the technology of the invention has better absorbency, room-temperature conductivity, electrochemical stability and the interface stability of electrolyte and lithium electrode; the performance of a lithium secondary battery prepared by using activated electrolyte is obviously better than the performance of the lithium secondary battery prepared by using the unactivated polyelectrolyte; the invention has simple technology, short reaction time, and convenient and easy condition for technologized production.
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Description

technical field

[0001] The invention relates to an activated gel-state lithium-ion battery polymer electrolyte film and a preparation method thereof, belonging to the technical field of chemical power sources. Background technique

[0002] Since Bellcore in the United States used high molecular polymers to develop polymer lithium-ion batteries (PLIB) in 1994, since its shape can be thinned and arbitrarily shaped, it can ensure full contact inside the battery and greatly Improving the flexibility of battery shape design, while polymer lithium-ion batteries have the advantages of light weight, high specific energy, and good safety performance, has become a research hotspot in lithium-ion batteries in recent years. A key component of a polymer lithium-ion battery is a polymer electrolyte. Polymer electrolytes can be divided into gel polymer electrolytes (GPE) and solid polymer electrolytes (SPE) according to their morphology. Gel polymer electrolytes have become a current rese...

Claims

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