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Preparation method of colloidal electrolyte for airport ferry vehicle lithium battery

A colloidal electrolyte and shuttle bus technology, which is applied in the field of colloidal electrolyte preparation of lithium batteries, can solve the problems of poor mechanical stability and thermal stability, poor ionic conductivity and electrochemical compatibility, etc., so as to improve interface stability and improve safety. , the effect of reducing group interaction

Active Publication Date: 2020-12-04
WEIHAI GUANGTAI AIRPORT EQUIP CO LTD
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Problems solved by technology

The Chinese invention patent with the application number 201811104130.4 introduces a method for preparing a flexible and stretchable battery array based on colloidal electrolytes. It is to add polyvinyl alcohol and polyethylene oxide to a solution of potassium hydroxide and stir, and solidify to form a colloidal electrolyte. The manufacturing method of the invention is simple, and the battery can meet the advantages of bending and stretching, but the ionic conductivity and electrochemical compatibility are poor
The invention patent publication with the application number 201811104275.4 introduces the colloid of PVA and potassium hydroxide as a separator and electrolyte. The preparation method is simple, but it has the disadvantages of poor mechanical and thermal stability.

Method used

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  • Preparation method of colloidal electrolyte for airport ferry vehicle lithium battery
  • Preparation method of colloidal electrolyte for airport ferry vehicle lithium battery
  • Preparation method of colloidal electrolyte for airport ferry vehicle lithium battery

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preparation example Construction

[0045] refer to figure 1 and figure 2 It can be seen that a method for preparing a colloidal electrolyte for an airport shuttle lithium battery comprises the following steps:

[0046] (1) PVDF-HFP and PMMA powders are weighed and dissolved in DMF and acetone solution;

[0047] (2) Add LLZO nanoparticles to the mixed solution after stirring;

[0048] (3) Stir fully for 10-90 minutes to obtain a milky white mixed solution;

[0049] (4) Add CMC powder to the mixed solution and stir fully;

[0050] (5) Add AIBN in the mixed solution as initiator;

[0051] (6) Heat the solution at 60-70°C, filter while it is hot, and cool the filtrate in the refrigerator for 1-3 hours;

[0052] (7) Precipitate crystals, filter again, and dry in a vacuum oven at 25-45°C for 12 hours;

[0053] (8) prepare electrolyte;

[0054] (9) Put the crystal obtained in step (7) into the electrolyte solution obtained in step (8), place it in a magnetic stirrer and stir until completely dissolved;

[005...

Embodiment 1

[0064] 1) Take PVDF-HFP and PMMA powder with a mass ratio of 1:1 with a balance;

[0065] 2) adding a solution of acetone and DMF with a volume ratio of 3:1;

[0066] 3) After stirring evenly with a magnetic stirrer, add LLZO nanoparticles into the mixed solution;

[0067] 4) Fully stir for 20 min to obtain a milky white mixed solution;

[0068] 5) First add CMC to the above solution, and then add AIBN to the mixed solution;

[0069] 6) Heat the solution to 60°C, filter while it is hot, and cool the filtrate in a refrigerator for 2 hours;

[0070] 7) Precipitate crystals, filter again, and dry in a vacuum oven at 25°C for 12 hours;

[0071] 8) prepare electrolyte;

[0072] 9) Add the crystals in step 7) to the electrolyte in step 8), and stir to completely dissolve them;

[0073] 10) Add NPGDA and stir and mix to obtain a composite polymer solution;

[0074] 11) The prepared composite polymer solution is passed through an electrospinning mechanism to obtain a blended fil...

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Abstract

The invention relates to a preparation method of a colloidal electrolyte for an airport ferry vehicle lithium battery, and particularly relates to the field of lithium ion power batteries. The methodcomprises the following steps: dissolving PVDF-HFP and PMMA in a solvent, and adding LLZO nanoparticles as an active filler to improve the ionic conductivity; and adding a natural polymer compound CMCfor surface coating modification, then transferring the composite polymer solution into an injection device of an electrostatic spinning machine to prepare a PVDF-HFP / PMMALLZO membrane, and soaking the prepared PVDF-HFP / PMMALLZO membrane in an electrolytic solution to form a PVDF-HFP / PMMA-LLZO composite polymer electrolyte. According to the invention, the safety, the reliability and the compatibility of the lithium battery are improved, and the lithium battery also has relatively good ion transmission performance.

Description

technical field [0001] The invention belongs to the field of lithium-ion power battery materials, and in particular relates to a method for preparing a colloidal electrolyte for lithium batteries. Background technique [0002] With the rapid development of science and technology and economy, energy shortage and environmental pollution are imminent. Therefore, people are focusing more on the new energy technology industry. Under this general trend, new energy vehicles have emerged as the times require. In the "Power Battery Blue Book: China's New Energy Vehicle Power Battery Industry Development Report (2018)", it has been shown that the country is now vigorously promoting the new energy industry, and the sales of lithium batteries continue to grow and the overall market price declines, gradually forming a sound battery recycling route system. According to the "Made in China 2025" plan issued by the Ministry of Industry and Information Technology in 2015, the annual output o...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2220/20H01M2300/0082H01M2300/0085Y02E60/10
Inventor 盛团结王明雨邢帅魏义礼
Owner WEIHAI GUANGTAI AIRPORT EQUIP CO LTD
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