Preparation method of gel thin film
A film and gel technology, applied in the field of gel film preparation, can solve problems such as poor contact conditions, accelerated gas, gas leakage, etc., and achieve the effects of good electrical conductivity, improved mechanical strength, and good mechanical properties
Inactive Publication Date: 2019-04-05
鄄城永铭地毯有限公司
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Problems solved by technology
Due to the low conductivity of the polymer solid electrolyte at room temperature (10-5~10-4s / cm), the contact with the electrode is poor, and the mechanical strength is poor and the fracture toughness is low.
[0003] The currently widely used lithium-ion battery electrolyte is a liquid electrolyte, which has the advantage of high conductivity, but because it contains flammable and volatile organic solvents, it releases flammable gases during charging and discharging, especially in some unconventional work. Under certain conditions (such as high-power charging and discharging, overcharging and overdischarging, etc.), the generation of a large amount of heat will accelerate the generation of gas, resulting in an increase in the internal pressure of the battery, gas leakage, and even fire and explosion, so there are serious safety hazards
Method used
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Embodiment Construction
[0013] The following examples further illustrate the invention.
[0014] A preparation method of a gel film, specifically comprising the following steps:
[0015] (1) Add 10g PAN and 50g acetonitrile respectively in the flask, and stir under the protection of inert gas for 10h to obtain uniform transparent viscous liquid to mix;
[0016] (2) Apply the obtained mucus evenly on the PP / PE composite diaphragm, and dry it in a vacuum at 0.01 MPa at 60°C for 24 hours to obtain a polyacrylonitrile gel film.
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Abstract
The invention discloses a preparation method of a gel thin film. The preparation method is simple and convenient to operate and feasible. According to the gel thin film prepared by the method, a polyolefin diaphragm is introduced, so that the mechanical property and the conductivity of a polyacrylonitrile gel electrolyte are improved; and when the gel thin film is used for preparing a lithium ionbattery, the battery has relatively high discharge specific capacity and charging and discharging efficiency.
Description
technical field [0001] The invention relates to the field of novel chemical materials, in particular to a method for preparing a gel film. Background technique [0002] Lithium-ion batteries using polymer solid electrolytes have been valued by researchers because of their safety, no leakage, small leakage current, and arbitrary shape. Due to the low conductivity of the polymer solid electrolyte at room temperature (10-5~10-4s / cm), the contact with the electrode is poor, and the mechanical strength is poor and the fracture toughness is low. [0003] The currently widely used lithium-ion battery electrolyte is a liquid electrolyte, which has the advantage of high conductivity, but because it contains flammable and volatile organic solvents, it releases flammable gases during charging and discharging, especially in some unconventional work. Under certain conditions (such as high-power charging and discharging, overcharging and overdischarging, etc.), the generation of a large ...
Claims
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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/058
CPCH01M10/0565H01M10/058H01M2004/023Y02E60/10Y02P70/50
Inventor 黄勇
Owner 鄄城永铭地毯有限公司
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