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Monomer and polymer for gel electrolyte material, and preparation methods and applications of monomer and polymer

A gel electrolyte and monomer technology, which is used in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolyte immobilization/gelation, etc., can solve the problems of difficult control of production process, difficulty in post-processing of products, and energy consumption in the preparation process. , to achieve the effect of improving energy storage and energy utilization, improving plasticity, and strong storage capacity

Active Publication Date: 2017-02-01
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the commonly used preparation methods of gel electrolytes use chemical methods or heat-induced free radical polymerization crosslinking, which requires the addition of additional initiators and preparation under heating conditions, resulting in low purity, difficult product post-processing, The preparation process consumes a lot of energy and the production process is difficult to control.

Method used

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  • Monomer and polymer for gel electrolyte material, and preparation methods and applications of monomer and polymer
  • Monomer and polymer for gel electrolyte material, and preparation methods and applications of monomer and polymer
  • Monomer and polymer for gel electrolyte material, and preparation methods and applications of monomer and polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, preparation lithium-ion battery gel electrolyte monomer

[0049]

[0050] In a 500mL two-necked bottle, add 200mL of dichloromethane, pump and change the air 3 times, replace the solution system with a nitrogen atmosphere, add 3-dimethylamino-1-propanol (30mmol, 3.60mL) into the system, and stir thoroughly , under an ice-water bath, triethylamine (60mmol, 8.32mL) was added, stirred thoroughly, and methacryloyl chloride (60mmol, 5.38mL) was added dropwise within 30min. After stirring at room temperature for 5 h, the system changed from a colorless liquid to an orange liquid. The resulting liquid was fully extracted with saturated sodium bicarbonate and saturated sodium chloride, the organic phase was fully dried over anhydrous sodium sulfate, and the organic solvent was spun off to obtain an orange oily product (methacrylic acid-N,N-dimethylaminopropyl , the yield is about 80%).

Embodiment 2

[0051] Embodiment 2, preparation lithium ion battery gel electrolyte

[0052] Polymethacrylic acid-N,N-dimethylaminopropyl ester-lithium hexafluorophosphate polymer gel electrolyte (PDMP-Li GPE) is a methacrylic acid-N,N-dimethylaminopropyl ester monomer polymerized and cross-linked by gamma rays preparation. Dissolve 0.75mol / L methacrylic acid-N,N-dimethylaminopropyl ester monomer in a mixed solution with a volume ratio of ethylene carbonate and diethyl carbonate of 1:1, and then add 0.05mol / L Joint agent polyethylene glycol dimethacrylate and 1mol / L LiPF 6 , after mixing evenly, ultrasonically degassed to form an orange-yellow transparent and clear solution. After γ-ray irradiation, under the condition of dose rate of 80Gy / min and absorbed dose of 10kGy, the polymerization and crosslinking of the system are initiated to form polymethacrylic acid-N,N-dimethylaminopropyl ester-lithium hexafluorophosphate polymer gel Electrolyte (PDMP-Li GPE).

Embodiment 3

[0053] Embodiment 3, prepare the ionic conductivity test of lithium-ion battery gel electrolyte

[0054] At room temperature, put the lithium-ion battery gel electrolyte in Example 2 (or Examples 7-27) into stainless steel electrodes, and use Shanghai Zhenhua 604D electrochemical workstation to test respectively. Measure the ion conductivity of the lithium ion battery gel of each example and comparative example, as figure 2 shown. It can be found that when the dose rate is 80Gy / min, the absorbed dose is 10kGy, the concentration of methacrylic-N,N-dimethylaminopropyl ester monomer is 0.75mol / L, and the polyethylene glycol dimethacrylate crosslinking agent When the concentration is 0.05mol / L, the ionic conductivity reaches the maximum value of 8.88×10 -3 S cm -1 .

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Abstract

The invention discloses a monomer and polymer for a gel electrolyte material, and preparation methods and applications of the monomer and the polymer. By a gamma ray or electron beam-induced polymerization crosslinking method, a hydrophobic oleophilic monomer and an acrylic ester crosslinking agent are polymerized and crosslinked in an organic solvent containing a lithium salt to obtain a polymer gel electrolyte. Compared with a traditional lithium-ion battery, the lithium-ion battery of using the gel electrolyte has higher ionic conductivity (8.88*10<-3>S cm<-1>); liquid leakage can be effectively prevented; the dangers of explosion, combustion and the like caused by liquid leakage are avoided; and the safety factor is high. Meanwhile, a traditional chemical method is replaced with a gamma ray or electron beam irradiation method, so that the preparation method is simpler, safe, environment-friendly and low in energy consumption and is very suitable for industrialized production.

Description

technical field [0001] The invention relates to a polymer gel electrolyte material monomer, polymer, preparation method and its application in the field of energy storage materials, especially in the field of lithium ion batteries, the ionic conductivity of the synthetic gel electrolyte at room temperature can reach 8.88×10 -3 S cm -1 . Background technique [0002] Lithium-ion batteries are the most widely used advanced secondary batteries today. Compared with traditional lead-acid batteries, they are light in weight and high in energy, and are widely used in small electronic devices such as electric vehicles, electric bicycles, and portable devices such as mobile phones and laptop computers. . At present, most lithium-ion batteries use liquid electrolytes, so as to achieve 10 -2 S cm -1 conductivity to meet battery performance. However, liquid electrolytes generally use flammable organic solutions such as alkyl carbonates. Such organic solutions have low flash points...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0565H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 翟茂林王艺蒙彭静李久强
Owner PEKING UNIV
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